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Home/Land Rover/Discovery/Land Rover Discovery L318 (2002-2004)/Repair manual/Testing & Diagnostics/Engine Controls - Self-Diagnostics - with Codes
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Engine Controls - Self-Diagnostics - with Codes Land Rover Discovery L318

Testing & Diagnostics ~33438 words

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTCDescription
DTC P0101MASS AIRFLOW TO THROTTLE SENSOR CROSS CHECK FAULT
DTC P0102 & P0103MASS AIR FLOW SENSOR FAULT
DTC P0112 & P0113AIR INTAKE TEMPERATURE SENSOR FAULT (IN MAF)
DTC P0116, P0117 & P0118ENGINE COOLANT TEMPERATURE SENSOR FAULT
DTC P0122 & P0123THROTTLE POSITION FAULT
DTC P0130, P0132 & P0134OXYGEN SENSOR UPSTREAM OF CATALYST BANK A (FRONT LEFT HAND SENSOR)
DTC P0133OXYGEN SENSOR AGING (PERIOD) UPSTREAM BANK A (FRONT LEFT HAND SENSOR)
DTC P0135OXYGEN SENSOR HEATER UPSTREAM OF CATALYST BANK A (FRONT LEFT HAND SENSOR)
DTC P0136, P0137, P0138 & P0140OXYGEN SENSOR DOWNSTREAM OF CATALYST BANK A (REAR LEFT HAND SENSOR)
DTC P0139OXYGEN SENSOR AGING DOWNSTREAM BANK A (REAR LEFT HAND SENSOR)
DTC P0141OXYGEN SENSOR HEATER DOWNSTREAM OF CATALYST BANK A (REAR LEFT HAND SENSOR)
DTC P0150, P0152 & P0154OXYGEN SENSOR UPSTREAM OF CATALYST BANK B (FRONT RIGHT HAND SENSOR)
DTC P0153OXYGEN SENSOR AGING (PERIOD) UPSTREAM BANK B (FRONT RIGHT HAND SENSOR)
DTC P0155OXYGEN SENSOR HEATER UPSTREAM OF CATALYST BANK B (FRONT RIGHT HAND SENSOR)
DTC P0156, P0157, P0158 & P0160OXYGEN SENSOR DOWNSTREAM OF CATALYST BANK B (REAR RIGHT HAND SENSOR)
DTC P0159OXYGEN SENSOR AGING DOWNSTREAM BANK B (REAR RIGHT HAND SENSOR)
DTC P0161OXYGEN SENSOR HEATER DOWNSTREAM OF CATALYST BANK B (REAR RIGHT HAND SENSOR)
DTC P0171 & P0172FUELLING AIR LEAK ADAPTION BANK A (LEFT) OUT OF RANGE
DTC P0171 & P0172FUELLING FLOW RATE ADAPTION BANK A (LEFT) OUT OF RANGE
DTC P0174 & P0175FUELLING AIR LEAK ADAPTION BANK B (RIGHT) OUT OF RANGE
DTC P0174 & P0175FUELLING FLOW RATE ADAPTION BANK B (RIGHT) OUT OF RANGE
DTC P0201, P0261 & P0262INJECTOR 1 CIRCUIT FAULT
DTC P0202, P0264 & P0265INJECTOR 2 CIRCUIT FAULT
DTC P0203, P0267 & P0268INJECTOR 3 CIRCUIT FAULT
DTC P0204, P0270 & P0271INJECTOR 4 CIRCUIT FAULT
DTC P0205, P0273 & P0274INJECTOR 5 CIRCUIT FAULT
DTC P0206, P0276 & P0277INJECTOR 6 CIRCUIT FAULT
DTC P0207, P0279 & P0280INJECTOR 7 CIRCUIT FAULT
DTC P0208, P0282 & P0283INJECTOR 8 CIRCUIT FAULT
DTC P0300EMISSION RELEVANT MISFIRE MULTIPLE CYLINDERS
DTC P0301EMISSION RELEVANT MISFIRE CYLINDER 1
DTC P0301SEVERE (CATALYST DAMAGING) MISFIRE CYLINDER 1
DTC P0302EMISSION RELEVANT MISFIRE CYLINDER 2
DTC P0302SEVERE (CATALYST DAMAGING) MISFIRE CYLINDER 2
DTC P0303EMISSION RELEVANT MISFIRE CYLINDER 3
DTC P0303SEVERE (CATALYST DAMAGING) MISFIRE CYLINDER 3
DTC P0304EMISSION RELEVANT MISFIRE CYLINDER 4
DTC P0304SEVERE (CATALYST DAMAGING) MISFIRE CYLINDER 4
DTC P0305EMISSION RELEVANT MISFIRE CYLINDER 5
DTC P0305SEVERE (CATALYST DAMAGING) MISFIRE CYLINDER 5
DTC P0306EMISSION RELEVANT MISFIRE CYLINDER 6
DTC P0306SEVERE (CATALYST DAMAGING) MISFIRE CYLINDER 6
DTC P0307EMISSION RELEVANT MISFIRE CYLINDER 7
DTC P0307SEVERE (CATALYST DAMAGING) MISFIRE CYLINDER 7
DTC P0308EMISSION RELEVANT MISFIRE CYLINDER 8
DTC P0308SEVERE (CATALYST DAMAGING) MISFIRE CYLINDER 8
DTC P0327 & P0328KNOCK SENSOR FAULT BANK A (LEFT)
DTC P0332 & P0333KNOCK SENSOR FAULT BANK B (RIGHT)
DTC P0335FAULT READING CRANK SENSOR REFERENCE MARK
DTC P0336FAULT READING CRANK SENSOR REFERENCE MARK
DTC P0340CAMSHAFT SENSOR SIGNAL OUT OF SYNC WITH CRANKSHAFT SENSOR
DTC P0412, P0413 & P0414SECONDARY AIR POWER STAGE FAULT
DTC P0418SECONDARY AIR PUMP POWER STAGE FAULT
DTC P0420CATALYST HAS DETERIORATED BANK A (LEFT)
DTC P0430CATALYST HAS DETERIORATED BANK B (RIGHT)
DTC P0440EVAPORATIVE CONTROL SYSTEM FAULT
DTC P0442EVAPORATIVE CONTROL SMALL LEAK DETECTED
DTC P0446PURGE CANISTER VENT SEAL VALVE FAULT
DTC P0447, P0448 & P0449PURGE CANISTER VENT SEAL VALVE CIRCUIT FAULT
DTC P0451, P0452 & P0453FUEL TANK PRESSURE SENSOR SIGNAL FAULT
DTC P0455EVAPORATIVE CONTROL LARGE LEAK DETECTED
DTC P0500 & P0501VEHICLE SPEED SENSOR SIGNAL FAULT
DTC P0505BLOCKED OR JAMMED IDLE AIR CONTROL VALVE
DTC P0560, P0562 & P0563ECM MEASURES BATTERY VOLTAGE AS INVALID
DTC P0600CAN INTERFACE TIMEOUT TO TRANSMISSION CONTROL UNIT
DTC P0601ECM SELF CHECK FAIL ROM
DTC P0603ECM HAS DETECTED FAULT MEMORY PROBLEM
DTC P0603ECM SELF CHECK FAIL xRAM
DTC P0604ECM SELF CHECK FAIL iRAM
DTC P0606KNOCK SENSOR ECM SELF TEST PULSE FAULT
DTC P0606KNOCK SENSOR ECM SELF TEST ZERO PULSE FAULT
DTC P0650MIL CIRCUIT FAULT
DTC P0654ENGINE SPEED SIGNAL OUTPUT CIRCUIT FAULT
DTC P0703SOLENOID VALVE LOCKUP CLUTCH CHECK (S/C TO +12V)
DTC P0705POSITION (PRND) SWITCH MONITORING FAULT
DTC P0705POSITION SWITCH MONITORING DURING CRANKING FAULT
DTC P0721DOWNSHIFT SAFETY MONITORING FAULT
DTC P0722STALL SPEED MONITORING
DTC P0731GEAR RATIO FAULT (1ST GEAR)
DTC P0732GEAR RATIO FAULT (2ND GEAR)
DTC P0733GEAR RATIO FAULT (3RD GEAR)
DTC P0734GEAR RATIO FAULT (4TH GEAR)
DTC P0741LOCK-UP CLUTCH MONITORING
DTC P0743SOLENOID VALVE LOCKUP CLUTCH S/C TO VEHICLE GROUND OR O/C
DTC P0748PRESSURE REGULATOR CHECK (S/C TO +12V)
DTC P0748PRESSURE REGULATOR S/C TO VEHICLE GROUND OR O/C
DTC P0753SOLENOID VALVE 1 CHECK (S/C TO +12V)
DTC P0753SOLENOID VALVE 1 S/C TO VEHICLE GROUND OR O/C
DTC P0758SOLENOID VALVE 2 CHECK (S/C TO +12V)
DTC P0758SOLENOID VALVE 2 S/C TO VEHICLE GROUND OR O/C
DTC P1129UPSTREAM OXYGEN SENSORS (SWAPPED)
DTC P1170OXYGEN SENSOR AGING (CHARACTERISTIC SHIFT) UPSTREAM BANK A (FRONT LEFT HAND SENSOR)
DTC P1173OXYGEN SENSOR AGING (CHARACTERISTIC SHIFT) UPSTREAM BANK B (FRONT RIGHT HAND SENSOR)
DTC P1230, P1231 & P1232FUEL PUMP RELAY CIRCUIT FAULT
DTC P1300SEVERE (CATALYST DAMAGING) MISFIRE - MULTIPLE CYLINDERS
DTC P1319MISFIRE DETECTED WITH LOW OR EMPTY FUEL TANK
DTC P1412, P1413 & P1414SECONDARY AIR SYSTEM FUNCTIONALITY BANK 1
DTC P1415, P1416 & P1417SECONDARY AIR SYSTEM FUNCTIONALITY BANK 1
DTC P1510, P1513 & P1514IDLE AIR CONTROL VALVE OPENING COIL FAULT
DTC P1535AIRCON SIGNAL FAULT
DTC P1551, P1552 & P1553IDLE AIR CONTROL VALVE CLOSING COIL FAULT
DTC P1562BATTERY SUPPLY FAULT
DTC P1590, P1591 & P1592ABS ROUGH ROAD SIGNAL FAULT
DTC P1601ECU INTERNAL FAULT - EEPROM CHECKSUM
DTC P1602ENGINE SPEED SIGNAL CAN MESSAGE FROM ECM INVALID
DTC P1606ECU INTERNAL FAULT - EEPROM COMMUNICATION
DTC P1606ECU INTERNAL FAULT - WATCH DOG CHECK
DTC P1612HIGHSIDE SWITCH CONTROL CANNOT SWITCH ON OR HAS S/C TO VEHICLE GROUND
DTC P1613HIGHSIDE SWITCH CONTROL CANNOT SWITCH OFF OR HAS S/C TO +12V
DTC P1663, P1664 & P1665THROTTLE/TORQUE SIGNAL OUTPUT CIRCUIT FAULT
DTC P1666, P1667 & P1668IMMOBILIZER CODE NOT RECEIVED FROM ALARM ECU
DTC P1672, P1673 & P1674IMMOBILIZER CODE FROM ANTI THEFT ALARM INCORRECT
DTC P1700LOW RANGE SIGNAL FAULT
DTC P1705RANGE SWITCH CIRCUIT FAULT
DTC P1776GEARBOX TORQUE SIGNAL PROBLEM (CAN LINK)
DTC P1810MESSAGE LINE 1 OPEN CIRCUIT OR SHORT CIRCUIT TO 12V OR GROUND
DTC P1810MESSAGE LINE 2 OPEN CIRCUIT OR SHORT CIRCUIT TO 12V OR GROUND
DTC P1841TRANSMISSION ECU IS RECEIVING CORRUPTED MESSAGES FROM THE ENGINE MANAGEMENT ECM
DTC P1842GEARBOX ECU & ENGINE MANAGEMENT ECM HAVE INCOMPATIBLE CAN LEVEL
DTC P1843TRANSMISSION ECU TO ENGINE MANAGEMENT ECM CAN LINK TIMEOUT
DTC P1884AIR INTAKE TEMPERATURE SIGNAL CAN MESSAGE FROM ECM INVALID
DTC P1884CAN MESSAGES FOR ALTITUDE CORRECTION FROM ECM INVALID
DTC P1884ENGINE COOLANT TEMPERATURE SIGNAL CAN MESSAGE FROM ECM INVALID
DTC P1884ENGINE FRICTION CAN MESSAGE FROM ECM INVALID
DTC P1884ENGINE SPEED SIGNAL CAN MESSAGE FROM ECM INVALID
DTC P1884ROAD SPEED CAN MESSAGE FROM ECM INVALID
DTC P1884THROTTLE ANGLE CAN MESSAGE FROM ECM INVALID
DTC P1884TORQUE SIGNAL CAN MESSAGE FROM ECM INVALID
DTC P1884TORQUE SIGNAL CAN MESSAGE FROM ECM INVALID

DIAGNOSTIC TROUBLE CODE DEFINITIONS

GENERAL

When diagnosing an electrical fault follow the steps below

  1. Read the circuit description appropriate to the reported fault to ensure a good understanding of circuit operation.
  2. Study the power distribution, fuse details and earth (ground) distribution diagrams and identify other circuits which share fuses and/or earth points. Check whether these circuits operate correctly.
  3. Using connector views, locate a point on the circuit (approximately half way between supply and earth) which is easily accessible.
  4. Check that the pin out details of the connector are correct and that the correct signals exist at the correct terminals.
  5. Continue to the next point on the circuit which is easiest to access and repeat the above.
  6. Continue this approach until a fault is found, rectify the fault and then verify that the circuit operates correctly.
CAUTIONNever probe directly into the front face of a connector. This can damage the terminal and cause a failure. Always probe the back of a terminal, taking care not to damage the terminal or any seals. Never probe wire insulation. On small diameter cables this can cut the conductors. It may also allow moisture into the cable, causing corrosion.

WIRE COLORS

For wire color codes used in diagnostic tests, see WIRE COLOR CODES table.

CodeColor
BBlack
GGreen
KPink
LGLight Green
NBrown
OOrange
PPurple
RRed
SSlate (Grey)
SCRScreen
TTransparent (White)
UBlue
WWhite
YYellow

WIRE COLOR CODES

DIAGNOSTIC TESTS

WARNINGAlways install testers and measuring instruments on the back seat and have a second person operate them from there. If test equipment were operated from the front passenger seat, the person sitting there could be injured if the front passenger airbag were triggered in the event of an accident.

Note. While limited diagnostic information is available, vehicle manufacturer does not support diagnostic information using aftermarket scan tools. To properly diagnose vehicle, it is recommended to use Textbook/T4 scan tool with appropriate adapter cables. Before replacing any component that scan tool suggests are faulty, ensure that all wiring connections and harness connectors are okay. Ensure that power and ground circuits are functioning properly.

Note. For circuit identification, see ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. For component locations, see appropriate COMPONENT LOCATION article in ELECTRICAL.

Description

  1. DTC P0101 Air Flow To Throttle Angle Cross Check Fault Drive Cycle B: Signal Implausible

Possible Causes

  1. Obstruction to airflow. See 1 under CHECK.
  2. MAFS fault. See 2 under CHECK.
  3. Throttle fault. See 3 under CHECK.

Check

  1. Obstruction To Airflow CHECK THE FOLLOWING Air intake path obstructed or air cleaner clogged. NOTE: Airflow will be normal for a specific engine speed but throttle will be further open than expected. POSSIBLE FAULTS Clogged air cleaner element. Obstruction in air intake path.
  2. MAFS Fault CHECK THE FOLLOWING Any MAFS diagnostic flags are set. POSSIBLE FAULTS Inaccurate reading from MAFS.
  3. Throttle Fault CHECK THE FOLLOWING Visual check for damage to throttle linkages. Any throttle diagnostic flags are set. POSSIBLE FAULTS Inaccurate reading from throttle position sensor.
  1. DTC P0102 Mass Air Flow Sensor Fault Drive Cycle A: Signal Out Of Range - Below Minimum
  2. DTC P0103 Mass Air Flow Sensor Fault Drive Cycle A: Signal Out Of Range - Above Maximum
  1. MAFS contaminated. See 1 under CHECK.
  2. Open circuit - C636/23 (UG) to C149/5 (UG). See 2 under CHECK.
  3. Open circuit - C636/9 (RB) to C149/3 (RB). See 3 under CHECK.
  4. 5V MAFS supply voltage C149/4 (R) to C149/3 (RB). See 4 under CHECK.
  5. 12V MAFS supply voltage C149/2 (NK) to C149/3 (RB). See 5 under CHECK.
  6. Connectors C149, ECM C636 (B). See 6 under CHECK.
  7. Fuse F2 Engine Compartment Fusebox. See 7 under CHECK.
  8. MAFS faulty. See 8 under CHECK.
  1. MAFS Contaminated CHECK THE FOLLOWING Visually inspect the metal and plastic mesh on the upstream side of the airflow meter. If this mesh is contaminated then this is a good indication that the sensor film is also contaminated. POSSIBLE FAULTS MAFS Fault - Contaminated hot film sensor.
  2. Open Circuit - C636/23 (UG) To C149/5 (UG) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit - C636/9 (RB) To C149/3 (RB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. 5V MAFS Supply Voltage C149/4 (R) To C149/3 (RB) CHECK THE FOLLOWING 5V MAFS supply voltage C149/4 (R) to C149/3 (RB). ACCEPTABLE RESULTS Between 4.5-5.5V. DIAGNOSTIC HINTS If the voltage is too high a short circuit to battery or faulty ECM should be suspected. If the voltage is too low an open circuit or connector problem should be suspected.
  5. 12V MAFS Supply Voltage C149/2 (NK) To C149/3 (RB) CHECK THE FOLLOWING 12 volt MAFS supply voltage C149/2 (NK) to C149/3 (RB). ACCEPTABLE RESULTS Between 11.5V and 15.0V. DIAGNOSTIC HINTS If the voltage is not present check F2 Engine Compartment Fusebox and open circuit C149/2 (NK) to C570/5 (NK).
  6. Connectors C149, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  7. Fuse F2 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  8. MAFS Faulty CHECK THE FOLLOWING Check MAFS by substituting with known good unit. POSSIBLE FAULTS MAFS Fault.
  1. DTC P0112 Intake-Air Temperature Sensor Fault (In MAFS) Drive Cycle B: Signal Out Of Range - Below Minimum
  2. DTC P0113 Intake-Air Temperature Sensor Fault (In MAFS) Drive Cycle B: Signal Out Of Range - Above Maximum
  1. Open circuit - C636/34 (SL) to C149/1 (SLG). See 1 under CHECK.
  2. Open circuit - C636/9 (RB) to C149/3 (RB). See 2 under CHECK.
  3. 5V IATS supply voltage C149/4 (R) to C636/7 (R). See 3 under CHECK.
  4. 12 volt IATS supply voltage C149/2 (NK) to C149/3 (RB). See 4 under CHECK.
  5. Connectors C149, ECM C636 (B). See 5 under CHECK.
  6. Fuse F2 Engine Compartment Fusebox. See 6 under CHECK.
  7. Inlet air temperature sensor faulty. See 7 under CHECK.
  1. Open Circuit - C636/34 (SL) To C149/1 (SLG) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Open Circuit - C636/9 (RB) To C149/3 (RB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. 5V IATS Supply Voltage C149/4 (R) To C636/7 (R) CHECK THE FOLLOWING 5V IATS supply voltage C149/4 (R) to C636/7 (R). ACCEPTABLE RESULTS Between 4.5V and 5.5V. DIAGNOSTIC HINTS If the voltage is too high a short circuit to battery or faulty ECM should be suspected. If the voltage is too low an open circuit or connector problem should be suspected.
  4. 12 volt IATS Supply Voltage C149/2 (NK) To C149/3 (RB) CHECK THE FOLLOWING 12 volt IATS supply voltage C149/2 (NK) to C149/3 (RB). ACCEPTABLE RESULTS Between 11.5V and 15.0V. DIAGNOSTIC HINTS If the voltage is not present check F2 Engine Compartment Fusebox and open circuit C149/2 (NK) to C570/5 (NK).
  5. Connectors C149, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  6. Fuse F2 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  7. Inlet Air Temperature Sensor Faulty CHECK THE FOLLOWING Check inlet air temperature sensor (in MAFS) by substituting MAFS with known good unit. POSSIBLE FAULTS IATS/MAFS Fault.
  1. DTC P0116 Engine Coolant Temperature Sensor Input Fault Drive Cycle D: Signal Implausible
  2. DTC P0117 Engine Coolant Temperature Sensor Input Fault Drive Cycle D: Signal Out Of Range - Below Minimum
  3. DTC P0118 Engine Coolant Temperature Sensor Input Fault Drive Cycle D: Signal Out Of Range - Above Maximum
  1. Connectors C196, ECM C636 (B). See 1 under CHECK.
  2. Open circuit - C636/22 (G) to C196/2 (G). See 2 under CHECK.
  3. Open circuit - C636/21 (RB) to C196/1 (KB). See 3 under CHECK.
  4. Engine cooling system problem. See 4 under CHECK.
  5. Engine coolant temperature sensor fault. See 5 under CHECK.
  1. Connectors C196, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit - C636/22 (G) To C196/2 (G) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit - C636/21 (RB) To C196/1 (KB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Engine Cooling System Problem CHECK THE FOLLOWING Check if the engine does not fully warm up within the normal time. Check that there is not a problem with the cooling system thermostat sticking open. NOTE: The diagnostic will flag a fault if the coolant temperature does not rise at the expected rate. POSSIBLE FAULTS Engine cooling system fault. Coolant thermostat fault.
  5. Engine Coolant Temperature Sensor Fault CHECK THE FOLLOWING Check coolant temperature sensor by substitution with a known good unit. POSSIBLE FAULTS Engine coolant temperature sensor fault.
  1. DTC P0122 Plausibility Check - Throttle Angle Drive Cycle B: Signal Out Of Range - Below Minimum.
  2. DTC P0123 Plausibility Check - Throttle Angle Drive Cycle B: Signal Out Of Range - Above Maximum.
  1. Connectors C175, ECM C636 (B). See 1 under CHECK.
  2. Open circuit - C636/24 (YLG) to C175/3 (YLG). See 2 under CHECK.
  3. Open circuit - C636/25 (RB) to C175/2 (RB). See 3 under CHECK.
  4. 5V MAFS supply voltage C175/1 (R) to C175/2 (RB). See 4 under CHECK.
  5. Throttle position sensor fault. See 5 under CHECK.
  1. Connectors C175, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit - C636/24 (YLG) To C175/3 (YLG) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit - C636/25 (RB) To C175/2 (RB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. 5V MAFS Supply Voltage C175/1 (R) To C175/2 (RB) CHECK THE FOLLOWING 5V MAFS supply voltage C175/1 (R) to C175/2 (RB). ACCEPTABLE RESULTS Between 4.5V and 5.5V. DIAGNOSTIC HINTS If the voltage is too high a short circuit to battery or faulty ECM should be suspected. If the voltage is too low an open circuit or connector problem should be suspected.
  5. Throttle Position Sensor Fault CHECK THE FOLLOWING Throttle position sensor resistance, pins /1 to /3. ACCEPTABLE RANGE 5K Ohms. CHECK THE FOLLOWING Throttle position sensor resistance, pins /3 to /2. ACCEPTABLE RANGE Reading should vary from below 100 ohms when the throttle is closed to 5k/Ohms as the sensor is moved to fully open. The reading should vary smoothly with no jumps in the reading as the throttle is moved.
  1. DTC P0130 Lambda Sensor Upstream Catalyst Bank 1 Drive Cycle C: Signal Implausible
  2. DTC P0132 Lambda Sensor Upstream Catalyst Bank 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  3. DTC P0134 Lambda Sensor Upstream Catalyst Bank 1 Drive Cycle C: Signal Missing
  1. Oxygen sensor heater not functioning correctly. See 1 under CHECK.
  2. Open circuit C635/15 (O) to C644/2 (O). See 2 under CHECK.
  3. Open circuit C635/9 (RB) to C644/1 (RB). See 3 under CHECK.
  4. Connector(s) C644, ECM C635 (B). See 4 under CHECK.
  5. Oxygen sensor damaged or surface contaminated. See 5 under CHECK.
  1. Oxygen Sensor Heater Not Functioning Correctly CHECK THE FOLLOWING Oxygen sensor heater fault flags are set. INFORMATION If the oxygen sensor is not at the correct operating temperature the sensor may appear faulty to the Motronic diagnostics system. This fault should be diagnosed by exploring the oxygen sensor heater faults which will be set if this fault is present.
  2. Open circuit C635/15 (O) To C644/2 (O) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open circuit C635/9 (RB) To C644/1 (RB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Connector(s) C644, ECM C635 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  5. Oxygen Sensor Damaged Or Surface Contaminated CHECK THE FOLLOWING Remove the oxygen sensor and examine the side internal to the exhaust system and the side outside the exhaust system. Both sides of the sensor should be free from contamination. Gas must be able to be absorbed by both sides of the sensor. Also check the sensor for any mechanical damage or cracks. INFORMATION If the oxygen sensor shows signs of damage or contamination that cannot be cleaned it should be renewed.
  1. DTC P0133 Lambda Sensor Aging tp Bank 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0133 Lambda Sensor Aging tp Bank 1 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Deteriorated oxygen sensor. See 1 under CHECK.
  1. Deteriorated Oxygen Sensor POSSIBLE FAULTS The Motronic ECM has internally diagnosed that the switching delay time of this oxygen sensor has degraded to a point where exhaust emissions will be increased. This fault is usually caused by the aging of the sensor in normal operation, however, this effect can be accelerated if the sensor has been contaminated with oil or other surface contamination.
  1. DTC P0135 Oxy Sensor Heater Upstream Cat Bank 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0135 Oxy Sensor Heater Upstream Cat Bank 1 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Open circuit heater - oxygen sensor/3 to oxygen sensor/4. See 1 under CHECK.
  2. Open circuit C635/19 (WO) to C644/4 (WO). See 2 under CHECK.
  3. Open circuit C573/3 (NK) to C644/3 (NK). See 3 under CHECK.
  4. Fuse condition - F2 Engine Compartment Fusebox. See 4 under CHECK.
  5. Connector(s) C644, ECM C635 (B). See 5 under CHECK.
  1. Open Circuit Heater - Oxygen Sensor/3 To Oxygen Sensor/4 OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Open Circuit C635/19 (WO) To C644/4 (WO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C573/3 (NK) To C644/3 (NK) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Fuse Condition - F2 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  5. Connector(s) C644, ECM C635 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0136 Lambda Sensor Downstream Catalyst Bank 1 Drive Cycle C: Signal Implausible
  2. DTC P0137 Lambda Sensor Downstream Catalyst Bank 1 Drive Cycle C: Signal Out Of Range - Below Minimum
  3. DTC P0138 Lambda Sensor Downstream Catalyst Bank 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  4. DTC P0140 Lambda Sensor Downstream Catalyst Bank 1 Drive Cycle C: Signal Missing
  1. Oxygen sensor heater not functioning correctly. See 1 under CHECK.
  2. Open circuit C635/17 (Y) to C643/2 (Y). See 2 under CHECK.
  3. Open circuit C635/11 (RB) to C643/1 (RB). See 3 under CHECK.
  4. Connector(s) C643, ECM C635 (B). See 4 under CHECK.
  5. Oxygen sensor damaged or surface contaminated. See 5 under CHECK.
  1. Oxygen Sensor Heater Not Functioning Correctly CHECK THE FOLLOWING Oxygen sensor heater fault flags are set. INFORMATION If the oxygen sensor is not at the correct operating temperature the sensor may appear faulty to the Motronic diagnostics system. This fault should be diagnosed by exploring the oxygen sensor heater faults which will be set if this fault is present.
  2. Open Circuit C635/17 (Y) To C643/2 (Y) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C635/11 (RB) To C643/1 (RB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Connector(s) C643, ECM C635 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  5. Oxygen Sensor Damaged Or Surface Contaminated CHECK THE FOLLOWING Remove the oxygen sensor and examine the side internal to the exhaust system and the side outside the exhaust system. Both sides of the sensor should be free from contamination. Gas must be able to be absorbed by both sides of the sensor. Also check the sensor for any mechanical damage or cracks. INFORMATION If the oxygen sensor shows signs of damage or contamination that cannot be cleaned it should be renewed.
  1. DTC P0139 Lambda Sensor Aging Downstream Bank 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0139 Lambda Sensor Aging Downstream Bank 1 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Deteriorated oxygen sensor. See 1 under CHECK.
  1. Deteriorated Oxygen Sensor POSSIBLE FAULTS The Motronic ECM has internally diagnosed that the switching characteristics of this oxygen sensor have degraded to a point where on board diagnostics will be affected. This fault is normally caused by the aging of the sensor in normal operation, however, this effect can be accelerated if the sensor has been contaminated with oil or other surface contamination.
  1. DTC P0141 Oxygen Sensor Heater Downstream Cat Bank 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0141 Oxy Sensor Heater Downstream Cat Bank 1 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Open circuit heater - oxygen sensor/3 to oxygen sensor/4. See 1 under CHECK.
  2. Open circuit C635/7 (WU) to C643/4 (WU). See 2 under CHECK.
  3. Open circuit C573/3 (NK) to C643/3 (NK). See 3 under CHECK.
  4. Fuse condition - F2 Engine Compartment Fusebox. See 4 under CHECK.
  5. Connector(s) C643, ECM C635 (B). See 5 under CHECK.
  1. OPEN_CIRCUIT Open circuit heater - oxygen sensor/3 to oxygen sensor/4. Check resistance less than 1 M/ohm.
  2. OPEN_CIRCUIT Open circuit C635/7 (WU) to C643/4 (WU). Check resistance less than 1 M/ohm.
  3. OPEN_CIRCUIT Open circuit C573/3 (NK) to C643/3 (NK). Check resistance less than 1 M/ohm.
  4. POWER_DISTRIBUTION Fuse condition - F2 Engine Compartment Fusebox: Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  5. CONNECTOR Connector(s) C643, ECM C635 (B). Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0150 Lambda Sensor Upstream Catalyst Bank 2 Drive Cycle C: Signal Implausible
  2. DTC P0152 Lambda Sensor Upstream Catalyst Bank 2 Drive Cycle C: Signal Out Of Range - Above Maximum
  3. DTC P0154 Lambda Sensor Upstream Catalyst Bank 2 Drive Cycle C: Signal Missing.
  1. Oxygen sensor heater not functioning correctly. See 1 under CHECK.
  2. Open circuit C635/16 (U) to C645/2 (U). See 2 under CHECK.
  3. Open circuit C635/10 (RB) to C645/1 (RB). See 3 under CHECK.
  4. Connector(s) C1225 ECM C635 (B). See 4 under CHECK.
  5. Oxygen sensor damaged or surface contaminated. See 5 under CHECK.
  1. Oxygen Sensor Heater Not Functioning Correctly CHECK THE FOLLOWING Oxygen sensor heater fault flags are set. INFORMATION If the oxygen sensor is not at the correct operating temperature the sensor may appear faulty to the Motronic diagnostics system. This fault should be diagnosed by exploring the oxygen sensor heater faults which will be set if this fault is present.
  2. Open circuit C635/16 (U) To C645/2 (U) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open circuit C635/10 (RB) To C645/1 (RB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Connector(s) C645, ECM C635 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  5. Oxygen Sensor Damaged Or Surface Contaminated CHECK THE FOLLOWING Remove the oxygen sensor and examine the side internal to the exhaust system and the side outside the exhaust system. Both sides of the sensor should be free from contamination. Gas must be able to be absorbed by both sides of the sensor. Also check the sensor for any mechanical damage or cracks. INFORMATION If the oxygen sensor shows signs of damage or contamination that cannot be cleaned it should be renewed.
  1. DTC P0153 Lambda Sensor Aging tp Bank 2 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0153 Lambda Sensor Aging tp Bank 2 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Deteriorated oxygen sensor. See 1 under CHECK.
  1. Deteriorated Oxygen Sensor POSSIBLE FAULTS The Motronic ECM has internally diagnosed that the switching characteristics of this oxygen sensor have degraded to a point where exhaust emissions will be increased. This fault is normally caused by the aging of the sensor in normal operation, however, this effect can be accelerated if the sensor has been contaminated with oil or other surface contamination.
  1. DTC P0155 Oxygen Sensor Heater Upstream Cat Bank 2 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0155 Oxy Sensor Heater Upstream Cat Bank 2 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Open circuit heater - oxygen sensor/3 to oxygen sensor/4. See 1 under CHECK.
  2. Open circuit C635/13 (WO) to C645/4 (WO). See 2 under CHECK.
  3. Open circuit C573/3 (NK) to C645/3 (NK). See 3 under CHECK.
  4. Fuse condition - F2 Engine Compartment Fusebox. See 4 under CHECK.
  5. Connector(s) C645, ECM C635 (B). See 5 under CHECK.
  1. Open Circuit Heater - Oxygen Sensor/3 To Oxygen Sensor/4 OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Open Circuit C635/13 (WO) To C645/4 (WO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C573/3 (NK) To C645/3 (NK) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Fuse Condition - F2 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  5. Connector(s) C645, ECM C635 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0156 Lambda Sensor Downstream Catalyst Bank 2 Drive Cycle C: Signal Implausible
  2. DTC P0157 Lambda Sensor Downstream Catalyst Bank 2 Drive Cycle C: Signal Out Of Range - Below Minimum
  3. DTC P0158 Lambda Sensor Downstream Catalyst Bank 2 Drive Cycle C: Signal Out Of Range - Above Maximum
  4. DTC P0160 Lambda Sensor Downstream Catalyst Bank 2 Drive Cycle C: Signal Missing
  1. Oxygen sensor heater not functioning correctly. See 1 under CHECK.
  2. Open circuit C635/14 (G) to C642/2 (G). See 2 under CHECK.
  3. Open circuit C635/8 (RB) to C642/1 (RB). See 3 under CHECK.
  4. Connector(s) C642, ECM C635 (B). See 4 under CHECK.
  5. Oxygen sensor damaged or surface contaminated. See 5 under CHECK.
  1. Oxygen Sensor Heater Not Functioning Correctly CHECK THE FOLLOWING Oxygen sensor heater fault flags are set. INFORMATION If the oxygen sensor is not at the correct operating temperature the sensor may appear faulty to the Motronic diagnostics system. This fault should be diagnosed by exploring the oxygen sensor heater faults which will be set if this fault is present.
  2. Open Circuit C635/14 (G) To C642/2 (G) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C635/8 (RB) To C642/1 (RB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Connector(s) C642, ECM C635 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  5. Oxygen Sensor Damaged Or Surface Contaminated CHECK THE FOLLOWING Remove the oxygen sensor and examine the side internal to the exhaust system and the side outside the exhaust system. Both sides of the sensor should be free from contamination. Gas must be able to be absorbed by both sides of the sensor. Also check the sensor for any mechanical damage or cracks. INFORMATION If the oxygen sensor shows signs of damage or contamination that cannot be cleaned it should be renewed.
  1. DTC P0159 Lambda Sensor Aging Downstream Bank 2 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0159 Lambda Sensor Aging Downstream Bank 2 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Deteriorated oxygen sensor. See 1 under CHECK.
  1. Deteriorated Oxygen Sensor POSSIBLE FAULTS The Motronic ECM has internally diagnosed that the switching characteristics of this oxygen sensor have degraded to a point where on board diagnostics will be affected. This fault is normally caused by the aging of the sensor in normal operation, however, this effect can be accelerated if the sensor has been contaminated with oil or other surface contamination.
  1. DTC P0161 Oxy Sensor Heater Downstream Cat Bank 2 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0161 Oxy Sensor Heater Downstream Cat Bank 2 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Open circuit heater - Oxygen sensor/3 to oxygen sensor/4. See 1 under CHECK.
  2. Open circuit C635/1 (WU) to C642/4 (WU). See 2 under CHECK.
  3. Open circuit C573/3 (NK) to C642/3 (NK). See 3 under CHECK.
  4. Fuse condition - F2 Engine Compartment Fusebox. See 4 under CHECK.
  5. Connector(s) C642, ECM C635 (B). See 5 under CHECK.
  1. Open Circuit Heater - Oxygen Sensor/3 To Oxygen Sensor/4 OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Open Circuit C635/1 (WU) To C642/4 (WU) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C573/3 (NK) To C642/3 (NK) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Fuse Condition - F2 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  5. Connector(s) C642, ECM C635 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0171 Additive Adaptive Mixture Correction TRA Bank 1 Drive Cycle B: Signal Out Of Range - Above Maximum
  2. DTC P0172 Additive Adaptive Mixture Correction TRA Bank 1 Drive Cycle B: Signal Out Of Range - Below Minimum
  1. Air leak between MAFS and inlet manifold (high TRA). See 1 under CHECK.
  2. Air leak in inlet manifold (high TRA). See 2 under CHECK.
  3. MAF sensor inaccurate. See 3 under CHECK.
  4. Fuel leak in one injector (low TRA). See 4 under CHECK.
  5. Part load breather pipe. See 5 under CHECK.
  1. Air Leak Between MAFS And Inlet Manifold (High TRA) CHECK THE FOLLOWING Fuelling adaption TRA also abnormally high on bank B (right). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set on the vehicle. POSSIBLE FAULTS Air leak near to MAFS. Air leak near to IACV. Air leak near to throttle body. DIAGNOSTIC HINTS If TRA adaption is normal on bank B (right) the problem is not an air leak. Misfire, oxygen sensor or catalyst faults could give a false indication of an air leak fault.
  2. Air Leak In Inlet Manifold (High TRA) CHECK THE FOLLOWING Fuelling adaption TRA also abnormally high on bank B (right). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set on the vehicle. POSSIBLE FAULTS Air leak in inlet manifold gaskets or seals. Porous inlet manifold casting (especially on new manifolds). Air leak around injector or spark plug seals. Air leak in injector or spark plug. DIAGNOSTIC HINTS If TRA adaption is normal on bank B (right) the problem is not an air leak. Misfire, oxygen sensor or catalyst faults could give a false indication of an air leak fault.
  3. MAF Sensor Inaccurate CHECK THE FOLLOWING Fuelling adaption TRA is also abnormal on bank B (right). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set. POSSIBLE FAULTS MAF sensor is functioning but inaccurate. DIAGNOSTIC HINTS Renew MAFS or test by substitution with known good unit.
  4. Fuel Leak In One Injector (Low TRA) CHECK THE FOLLOWING Fuelling adaption TRA is slightly reduced or normal on bank B (right) and reduced on bank A (left). There are no misfire faults set on bank A (left) the vehicle. There are no oxygen sensor or catalyst faults set on bank A (left). POSSIBLE FAULTS Continuous fuel seepage in one injector. DIAGNOSTIC HINTS Misfire, oxygen sensor or catalyst faults could give a false indication of a fuel leak fault. Look for evidence of the fuel leak (excess fuel present in cylinder). Fit a pressure gauge to the fuel rail and check that the fuel pressure does not die away quickly when the ignition is switched off (indicating a leak).
  5. Part Load Breather Pipe CHECK THE FOLLOWING Part load breather pipe connections. State of the part load breather pipe for cracks etc.
  1. DTC P0171 Mixture Adaption Factor FRA Bank 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0172 Mixture Adaption Factor FRA Bank 1 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Faulty injector (low or high flow). See 1 under CHECK.
  2. Fuel pressure regulator fault - pressure incorrect. See 2 under CHECK.
  3. MAF sensor inaccurate. See 3 under CHECK.
  4. Fuel pump fault - flow too low. See 4 under CHECK.
  5. Part load breather pipe. See 5 under CHECK.
  1. Faulty Injector (Low Or High Flow) CHECK THE FOLLOWING Fuelling adaption FRA is normal on bank B (right). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set on bank A (left). Check Engine Roughness and misfire counts. Is one cylinder different from the others? POSSIBLE FAULTS Fuel injector flow rate too low (one injector bank A). Fuel injector flow rate too high (one injector bank A). DIAGNOSTIC HINTS Renew or temporarily substitute injector for any cylinder with abnormal engine roughness or misfire counts. Renew or temporarily substitute all injectors for bank A. Swap injectors with injectors from the opposite bank to see if fault can be transferred to opposite bank.
  2. Fuel Pressure Regulator Fault - Pressure Incorrect CHECK THE FOLLOWING Fuelling adaption FRA is also abnormal on bank B (right). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set. POSSIBLE FAULTS Fuel pressure too low (high FRA adaption). Fuel pressure too high (low FRA adaption). DIAGNOSTIC HINTS Fit fuel pressure gauge and measure fuel pressure.
  3. MAF Sensor Inaccurate CHECK THE FOLLOWING Fuelling adaption FRA is also abnormal on bank B (right). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set. Fuel pressure (measured with pressure gauge) is correct. POSSIBLE FAULTS MAF sensor is functioning but inaccurate. DIAGNOSTIC HINTS Renew MAFS or test by substitution with known good unit.
  4. Fuel Pump Fault - Flow Too Low CHECK THE FOLLOWING Fuelling adaption FRA is abnormally high on both banks. There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set. POSSIBLE FAULTS Fuel pressure too low at high engine power due to poor fuel pump flow. DIAGNOSTIC HINTS Fit fuel pressure gauge and measure fuel pressure during driving at high engine revs.
  5. Part Load Breather Pipe CHECK THE FOLLOWING Part load breather pipe connections. State of the part load breather pipe for cracks etc.
  1. DTC P0174 Additive Adaptive Mixture Correction TRA Bank 2 Drive Cycle B: Signal Out Of Range - Above Maximum
  2. DTC P0175 Additive Adaptive Mixture Correction TRA Bank 2 Drive Cycle B: Signal Out Of Range - Below Minimum
  1. Air leak between MAFS and inlet manifold (high TRA). See 1 under CHECK.
  2. Air leak in inlet manifold (high TRA). See 2 under CHECK.
  3. MAF sensor inaccurate. See 3 under CHECK.
  4. Fuel leak in one injector (low TRA). See 4 under CHECK.
  5. Part load breather pipe. See 5 under CHECK.
  1. Air Leak Between MAFS And Inlet Manifold (High TRA) CHECK THE FOLLOWING Fuelling adaption TRA also abnormally high on bank A (left). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set on the vehicle. POSSIBLE FAULTS Air leak near to MAFS. Air leak near to IACV. Air leak near to throttle body. DIAGNOSTIC HINTS If TRA adaption is normal on bank A (left) the problem is not an air leak. Misfire, oxygen sensor or catalyst faults could give a false indication of an air leak fault.
  2. Air Leak In Inlet Manifold (High TRA) CHECK THE FOLLOWING Fuelling adaption TRA also abnormally high on bank A (left). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set on the vehicle. POSSIBLE FAULTS Air leak in inlet manifold gaskets or seals. Porous inlet manifold casting (especially on new manifolds). Air leak around injector or spark plug seals. Air leak in injector or spark plug. DIAGNOSTIC HINTS If TRA adaption is normal on bank A (left) the problem is not an air leak. Misfire, oxygen sensor or catalyst faults could give a false indication of an air leak fault.
  3. MAF Sensor Inaccurate CHECK THE FOLLOWING Fuelling adaption TRA is also abnormal on bank A (left). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set. POSSIBLE FAULTS MAF sensor is functioning but inaccurate. DIAGNOSTIC HINTS Renew MAFS or test by substitution with known good unit.
  4. Fuel Leak In One Injector (Low TRA) CHECK THE FOLLOWING Fuelling adaption TRA is slightly reduced or normal on bank A (left) and reduced on bank B (right). There are no misfire faults set on bank B (right) the vehicle. There are no oxygen sensor or catalyst faults set on bank B (right). POSSIBLE FAULTS Continuous fuel seepage in one injector. DIAGNOSTIC HINTS Misfire, oxygen sensor or catalyst faults could give a false indication of a fuel leak fault. Look for evidence of the fuel leak (excess fuel present in cylinder). Fit a pressure gauge to the fuel rail and check that the fuel pressure does not die away quickly when the ignition is switched off (indicating a leak).
  5. Part Load Breather Pipe CHECK THE FOLLOWING Part load breather pipe connections. State of the part load breather pipe for cracks etc.
  1. DTC P0174 Mixture Adaption Factor FRA Bank 2 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P0175 Mixture Adaption Factor FRA Bank 2 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Faulty injector (Low or high flow). See 1 under CHECK.
  2. Fuel pressure regulator fault - pressure incorrect. See 2 under CHECK.
  3. MAF sensor inaccurate. See 3 under CHECK.
  4. Fuel pump fault - flow too low. See 4 under CHECK.
  5. Part load breather pipe. See 5 under CHECK.
  1. Faulty Injector (Low Or High Flow) CHECK THE FOLLOWING Fuelling adaption FRA is normal on bank A (left). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set on bank B (right). Check Engine Roughness and misfire counts. Is one cylinder different from the others? POSSIBLE FAULTS Fuel injector flow rate too low (one injector bank B). Fuel injector flow rate too high (one injector bank B). DIAGNOSTIC HINTS Renew or temporarily substitute injector for any cylinder with abnormal engine roughness or misfire counts. Renew or temporarily substitute all injectors for bank B. Swap injectors with injectors from the opposite bank to see if fault can be transferred to opposite bank.
  2. Fuel Pressure Regulator Fault - Pressure Incorrect CHECK THE FOLLOWING Fuelling adaption FRA is also abnormal on bank A (left). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set POSSIBLE FAULTS Fuel pressure too low (high FRA adaption). Fuel pressure too high (low FRA adaption). DIAGNOSTIC HINTS Fit fuel pressure gauge and measure fuel pressure.
  3. MAF Sensor Inaccurate CHECK THE FOLLOWING Fuelling adaption FRA is also abnormal on bank A (left). There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set. Fuel pressure (measured with pressure gauge) is correct. POSSIBLE FAULTS MAF sensor is functioning but inaccurate. DIAGNOSTIC HINTS Renew MAFS or test by substitution with known good unit.
  4. Fuel Pump Fault - Flow Too Low CHECK THE FOLLOWING Fuelling adaption FRA is abnormally high on both banks. There are no misfire faults set on the vehicle. There are no oxygen sensor or catalyst faults set. POSSIBLE FAULTS Fuel pressure too low at high engine power due to poor fuel pump flow. DIAGNOSTIC HINTS Fit fuel pressure gauge and measure fuel pressure during driving at high engine revs.
  5. Part Load Breather Pipe Connections CHECK THE FOLLOWING Part load breather pipe State of the part load breather pipe for cracks etc.
  1. DTC P0201 Fuel Injector Fault - Cylinder 1 Drive Cycle A: Signal Missing.
  2. DTC P0261 Fuel Injector Fault - Cylinder 1 Drive Cycle A: Signal Out Of Range - Below Minimum.
  3. DTC P0262 Fuel Injector Fault - Cylinder 1 Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Injector 1 open circuit. See 1 under CHECK.
  2. Injector 1 short circuit. See 2 under CHECK.
  3. Injector 1 driver (in ECM) stuck on. See 3 under CHECK.
  4. Injector 1 driver (in ECM) stuck off. See 4 under CHECK.
  5. Fuse condition - F1 Engine Compartment. Fusebox See 5 under CHECK.
  6. Open circuit - C522/2 (NO) to C571/1 (NO). See 6 under CHECK.
  7. Open circuit - C522/1 (YU) to C636/41 (YU). See 7 under CHECK.
  8. Connector(s) C522, ECM C636 (B). See 8 under CHECK.
  1. Injector 1 Open Circuit OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Injector 1 Short Circuit SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. Injector 1 Driver (In ECM) Stuck On CHECK THE FOLLOWING Injector 1 driver (in ECM) stuck on. POSSIBLE FAULTS Faulty ECM - Drive always energized (injecting) when ignition on. Harness cable connected to C522/1 (YU) shorted to ground - Valve always energized (injecting). DIAGNOSTIC HINTS Use multimeter to manually check components.
  4. Injector 1 Driver (In ECM) Stuck Off CHECK THE FOLLOWING Injector 1 driver (in ECM) stuck off. POSSIBLE FAULTS Faulty ECM - Injector never energized (no injection). Harness cable connected to C522/1 (YU) shorted to battery positive - Injector never energized (no injection). DIAGNOSTIC HINTS Use multimeter to manually check components.
  5. Fuse Condition - F1 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  6. Open Circuit - C522/2 (NO) To C571/1 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit - C522/1 (YU) To C636/41 (YU) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  8. Connector(s) C522, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0202 Fuel Injector Fault - Cylinder 2 Drive Cycle A: Signal Missing
  2. DTC P0264 Fuel Injector Fault - Cylinder 2 Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P0265 Fuel Injector Fault - Cylinder 2 Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Injector 2 open circuit. See 1 under CHECK.
  2. Injector 2 short circuit. See 2 under CHECK.
  3. Injector 2 driver (in ECM) stuck on. See 3 under CHECK.
  4. Injector 2 driver (in ECM) stuck off. See 4 under CHECK.
  5. Fuse condition - F1 Engine Compartment. Fusebox. See 5 under CHECK.
  6. Open circuit - C523/2 (NO) to C571/1 (NO). See 6 under CHECK.
  7. Open circuit - C523/1 (YW) to C636/1 (YW). See 7 under CHECK.
  8. Connector(s) C523, ECM C636 (B). See 8 under CHECK.
  1. Injector 2 Open Circuit OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Injector 2 Short Circuit SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. Injector 2 Driver (In ECM) Stuck On CHECK THE FOLLOWING Injector 2 driver (in ECM) stuck on. POSSIBLE FAULTS Faulty ECM - Drive always energized (injecting) when ignition on. Harness cable connected to C523/1 (YW) shorted to ground - Valve always energized (injecting). DIAGNOSTIC HINTS Use multimeter to manually check components.
  4. Injector 2 Driver (In ECM) Stuck Off CHECK THE FOLLOWING Injector 2 driver (in ECM) stuck off. POSSIBLE FAULTS Faulty ECM - Injector never energized (no injection). Harness cable connected to C523/1 (YW) shorted to battery positive - Injector never energized (no injection). DIAGNOSTIC HINTS Use multimeter to manually check components.
  5. Fuse Condition - F1 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  6. Open Circuit - C523/2 (NO) To C571/1 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit - C523/1 (YW) To C636/1 (YW) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  8. Connector(s) C523, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0203 Fuel Injector Fault - Cylinder 3 Drive Cycle A: Signal Missing
  2. DTC P0267 Fuel Injector Fault - Cylinder 3 Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P0268 Fuel Injector Fault - Cylinder 3 Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Injector 3 open circuit. See 1 under CHECK.
  2. Injector 3 short circuit. See 2 under CHECK.
  3. Injector 3 driver (in ECM) stuck on. See 3 under CHECK.
  4. Injector 3 driver (in ECM) stuck off. See 4 under CHECK.
  5. Fuse condition - F1 Engine Compartment. See 5 under CHECK.
  6. Fusebox Open circuit - C524/2 (NO) to C571/1 (NO). See 6 under CHECK.
  7. Open circuit - C524/1 (YB) to C636/27 (YB). See 7 under CHECK.
  8. Connector(s) C524, ECM C636 (B). See 8 under CHECK.
  1. Injector 3 Open Circuit OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Injector 3 Short Circuit SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. Injector 3 Driver (In ECM) Stuck On CHECK THE FOLLOWING Injector 3 driver (in ECM) stuck on. POSSIBLE FAULTS Faulty ECM - Drive always energized (injecting) when ignition on. Harness cable connected to C524/1 (YB) shorted to ground - Valve always energized (injecting). DIAGNOSTIC HINTS Use multimeter to manually check components.
  4. Injector 3 Driver (In ECM) Stuck Off CHECK THE FOLLOWING Injector 3 driver (in ECM) stuck off. POSSIBLE FAULTS Faulty ECM - Injector never energized (no injection). Harness cable connected to C524/1 (YB) shorted to battery positive - Injector never energized (no injection). DIAGNOSTIC HINTS Use multimeter to manually check components.
  5. Fuse Condition - F1 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  6. Open Circuit - C524/2 (NO) To C571/1 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit - C524/1 (YB) To C636/27 (YB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  8. Connector(s) C524, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0204 Fuel Injector Fault - Cylinder 4 Drive Cycle A: Signal Missing
  2. DTC P0270 Fuel Injector Fault - Cylinder 4 Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P0271 Fuel Injector Fault - Cylinder 4 Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Injector 4 open circuit. See 1 under CHECK.
  2. Injector 4 short circuit. See 2 under CHECK.
  3. Injector 4 driver (in ECM) stuck on. See 3 under CHECK.
  4. Injector 4 driver (in ECM) stuck off. See 4 under CHECK.
  5. Fuse condition - F1 Engine Compartment Fusebox. See 5 under CHECK.
  6. Open circuit - C525/2 (NO) to C571/1 (NO). See 6 under CHECK.
  7. Open circuit - C525/1 (YN) to C636/40 (YN). See 7 under CHECK.
  8. Connector(s) C525, ECM C636 (B). See 8 under CHECK.
  1. Injector 4 Open Circuit OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Injector 4 Short Circuit SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. Injector 4 Driver (In ECM) Stuck On CHECK THE FOLLOWING Injector 4 driver (in ECM) stuck on. POSSIBLE FAULTS Faulty ECM - Drive always energized (injecting) when ignition on. Harness cable connected to C525/1 (YN) shorted to ground - Valve always energized (injecting). DIAGNOSTIC HINTS Use multimeter to manually check components.
  4. Injector 4 Driver (In ECM) Stuck Off CHECK THE FOLLOWING Injector 4 driver (in ECM) stuck off. POSSIBLE FAULTS Faulty ECM - Injector never energized (no injection). Harness cable connected to C525/1 (YN) shorted to battery positive - Injector never energized (no injection). DIAGNOSTIC HINTS Use multimeter to manually check components.
  5. Fuse Condition - F1 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  6. Open Circuit - C525/2 (NO) To C571/1 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit - C525/1 (YN) To C636/40 (YN) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  8. Connector(s) C525, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0205 Fuel Injector Fault - Cylinder 5 Drive Cycle A: Signal Missing
  2. DTC P0273 Fuel Injector Fault - Cylinder 5 Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P0274 Fuel Injector Fault - Cylinder 5 Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Injector 5 open circuit. See 1 under CHECK.
  2. Injector 5 short circuit. See 2 under CHECK.
  3. Injector 5 driver (in ECM) stuck on. See 3 under CHECK.
  4. Injector 5 driver (in ECM) stuck off. See 4 under CHECK.
  5. Fuse condition - F1 Engine Compartment Fusebox. See 5 under CHECK.
  6. Open circuit - C526/2 (NO) to C571/1 (NO). See 6 under CHECK.
  7. Open circuit - C526/1 (YG) to C636/2 (YG). See 7 under CHECK.
  8. Connector(s) C526, ECM C636 (B). See 8 under CHECK.
  1. Injector 5 Open Circuit OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Injector 5 Short Circuit SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. Injector 5 Driver (In ECM) Stuck On CHECK THE FOLLOWING Injector 5 driver (in ECM) stuck on. POSSIBLE FAULTS Faulty ECM - Drive always energized (injecting) when ignition on. Harness cable connected to C526/1 (YG) shorted to ground - Valve always energized (injecting). DIAGNOSTIC HINTS Use multimeter to manually check components.
  4. Injector 5 Driver (In ECM) Stuck Off CHECK THE FOLLOWING Injector 5 driver (in ECM) stuck off. POSSIBLE FAULTS Faulty ECM - Injector never energized (no injection). Harness cable connected to C526/1 (YG) shorted to battery positive - Injector never energized (no injection). DIAGNOSTIC HINTS Use multimeter to manually check components.
  5. Fuse Condition - F1 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  6. Open Circuit - C526/2 (NO) To C571/1 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit - C526/1 (YG) To C636/2 (YG) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  8. Connector(s) C526, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0206 Fuel Injector Fault - Cylinder 6 Drive Cycle A: Signal Missing
  2. DTC P0276 Fuel Injector Fault - Cylinder 6 Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P0277 Fuel Injector Fault - Cylinder 6 Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Injector 6 open circuit. See 1 under CHECK.
  2. Injector 6 short circuit. See 2 under CHECK.
  3. Injector 6 driver (in ECM) stuck on. See 3 under CHECK.
  4. Injector 6 driver (in ECM) stuck off. See 4 under CHECK.
  5. Fuse condition - F1 Engine Compartment Fusebox. See 5 under CHECK.
  6. Open circuit - C527/2 (NO) to C571/1 (NO). See 6 under CHECK.
  7. Open circuit - C527/1 (YS) to C636/15 (YS). See 7 under CHECK.
  8. Connector(s) C527, ECM C636 (B). See 8 under CHECK.
  1. Injector 6 Open Circuit OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Injector 6 Short Circuit SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. Injector 6 Driver (In ECM) Stuck On CHECK THE FOLLOWING Injector 6 driver (in ECM) stuck on. POSSIBLE FAULTS Faulty ECM - Drive always energized (injecting) when ignition on. Harness cable connected to C527/1 (YS) shorted to ground - Valve always energized (injecting). DIAGNOSTIC HINTS Use multimeter to manually check components.
  4. Injector 6 Driver (In ECM) Stuck Off CHECK THE FOLLOWING Injector 6 driver (in ECM) stuck off. POSSIBLE FAULTS Faulty ECM - Injector never energized (no injection). Harness cable connected to C527/1 (YS) shorted to battery positive - Injector never energized (no injection). DIAGNOSTIC HINTS Use multimeter to manually check components.
  5. Fuse Condition - F1 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  6. Open Circuit - C527/2 (NO) To C571/1 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit - C527/1 (YS) To C636/15 (YS) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  8. Connector(s) C527, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0207 Fuel Injector Fault - Cylinder 7 Drive Cycle A: Signal Missing
  2. DTC P0279 Fuel Injector Fault - Cylinder 7 Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P0280 Fuel Injector Fault - Cylinder 7 Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Injector 7 open circuit. See 1 under CHECK.
  2. Injector 7 short circuit. See 2 under CHECK.
  3. Injector 7 driver (in ECM) stuck on. See 3 under CHECK.
  4. Injector 7 driver (in ECM) stuck off. See 4 under CHECK.
  5. Fuse condition - F1 Engine Compartment Fusebox. See 5 under CHECK.
  6. Open circuit - C528/2 (NO) to C571/1 (NO). See 6 under CHECK.
  7. Open circuit - C528/1 (YR) to C636/14 (YR). See 7 under CHECK.
  8. Connector(s) C528, ECM C636 (B). See 8 under CHECK.
  1. Injector 7 Open Circuit OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Injector 7 Short Circuit SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. Injector 7 Driver (In ECM) Stuck On CHECK THE FOLLOWING Injector 7 driver (in ECM) stuck on. POSSIBLE FAULTS Faulty ECM - Drive always energized (injecting) when ignition on. Harness cable connected to C528/1 (YR) shorted to ground - Valve always energized (injecting). DIAGNOSTIC HINTS Use multimeter to manually check components.
  4. Injector 7 Driver (In ECM) Stuck Off CHECK THE FOLLOWING Injector 7 driver (in ECM) stuck off. POSSIBLE FAULTS Faulty ECM - Injector never energized (no injection). Harness cable connected to C528/1 (YR) shorted to battery positive - Injector never energized (no injection). DIAGNOSTIC HINTS Use multimeter to manually check components.
  5. Fuse Condition - F1 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  6. Open Circuit - C528/2 (NO) To C571/1 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit - C528/1 (YR) To C636/14 (YR) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  8. Connector(s) C528, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0208 Fuel Injector Fault - Cylinder 8 Drive Cycle A: Signal Missing
  2. DTC P0282 Fuel Injector Fault - Cylinder 8 Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P0283 Fuel Injector Fault - Cylinder 8 Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Injector 8 open circuit. See 1 under CHECK.
  2. Injector 8 short circuit. See 2 under CHECK.
  3. Injector 8 driver (in ECM) stuck on. See 3 under CHECK.
  4. Injector 8 driver (in ECM) stuck off. See 4 under CHECK.
  5. Fuse condition - F1 Engine Compartment Fusebox. See 5 under CHECK.
  6. Open circuit - C529/2 (NO) to C571/1 (NO). See 6 under CHECK.
  7. Open circuit - C529/1 (YK) to C636/28 (YK). See 7 under CHECK.
  8. Connector(s) C529, ECM C636 (B). See 8 under CHECK.
  1. Injector 8 Open Circuit OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Injector 8 Short Circuit SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. Injector 8 Driver (In ECM) Stuck On CHECK THE FOLLOWING Injector 8 driver (in ECM) stuck on. POSSIBLE FAULTS Faulty ECM - Drive always energized (injecting) when ignition on. Harness cable connected to C529/1 (YK) shorted to ground - Valve always energized (injecting). DIAGNOSTIC HINTS Use multimeter to manually check components.
  4. Injector 8 Driver (In ECM) Stuck Off CHECK THE FOLLOWING Injector 8 driver (in ECM) stuck off. POSSIBLE FAULTS Faulty ECM - Injector never energized (no injection). Harness cable connected to C529/1 (YK) shorted to battery positive - Injector never energized (no injection). DIAGNOSTIC HINTS Use multimeter to manually check components.
  5. Fuse Condition - F1 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  6. Open Circuit - C529/2 (NO) To C571/1 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit - C529/1 (YK) To C636/28 (YK) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  8. Connector(s) C529, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0300 Emission Relevant Misfire Multiple Cylinders Drive Cycle C: Signal Out Of Range - Above Maximum
  1. Fuel pressure too low. See 1 under CHECK.
  2. Crank synchronization problem. See 2 under CHECK.
  3. Ignition coil fault. See 3 under CHECK.
  4. Fuel contamination. See 4 under CHECK.
  5. Engine mechanical fault. See 5 under CHECK.
  1. Fuel Pressure Too Low CHECK THE FOLLOWING Fuelling adaptions show enrichment. Check fuel pressure with fuel pressure gauge. POSSIBLE FAULTS Fuel filter blocked. Fuel pressure regulator fault. Fuel pump fault.
  2. Crank Synchronization Problem CHECK THE FOLLOWING Sporadic reference mark error count raised. Reset count possibly also raised. Crank sensor fault is set. POSSIBLE FAULTS Crank sensor wheel physically damaged. Crank sensor out of position. Crank sensor faulty. DIAGNOSTIC HINTS Raised reset count with a zero reference error count may indicate a 12 volt supply problem. Diagnose fault with raised reference error count as a crank sensor fault.
  3. Ignition Coil Fault CHECK THE FOLLOWING Misfire counts high for all cylinders using coil 2 (1, 4, 6, 7). Misfire counts high for all cylinders using coil 1 (2, 3, 5, 8). Misfire counts high for all cylinders. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 7, 6). Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Problem with 12 volt supply to both coil packs. Coil pack 2 faulty. DIAGNOSTIC HINTS Raised misfire counts on paired cylinders 4+7, 2+3, 1+6, 5+8 indicate a problem with one coil drive or secondary circuit. Raised misfire counts on groups of four cylinders 1+4+6+7 or 2+3+5+8 indicate coil pack problems. Raised counts on groups of four cylinders 1+3+5+7 or 2+4+6+8 indicate a bank fuelling problem.
  4. Fuel Contamination CHECK THE FOLLOWING Misfire counts equally high for all cylinders. Fuel pressure measured with fuel pressure gauge reads normal. Abnormal fuelling adaptions. Visual check of fuel in fuel line (take sample). POSSIBLE FAULTS Fuel contaminated.
  5. Engine Mechanical Fault CHECK THE FOLLOWING Raised air flow at idle. Cylinder compressions. Cylinder leakages. Valve timing (CAM). Spark plug condition - check for oil or carbon fouling. POSSIBLE FAULTS Valve, Piston or CAM problems causing low engine efficiency. Engine running rich causing carbon deposits on spark plugs.
  1. DTC P0301 Emission Relevant Misfire Cyl 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 1. See 1 under CHECK.
  2. Ignition coil problem cylinders 1 and 6. See 2 under CHECK.
  3. Ignition coil problem cylinders 1, 4, 7, 6. See 3 under CHECK.
  4. Faulty fuel injector cylinder 1. See 4 under CHECK.
  5. Cylinder 1 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 1 CHECK THE FOLLOWING Misfire counts high for cylinder 1. Misfire counts close to normal for cylinder 6. POSSIBLE FAULTS Spark plug problem cylinder 1. HT lead problem cylinder 1. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 6 also.
  2. Ignition Coil Problem Cylinders 1 And 6 CHECK THE FOLLOWING Misfire counts high for cylinder 1. Misfire counts also raised for cylinder 6. POSSIBLE FAULTS Spark plug problem cylinder 1 or 6 - No spark. Open circuit HT lead problem cylinder 1 or 6. Ignition coil problem - coil pack 2 (cylinders 1, 4, 7, 6). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 6 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 1, 4, 7, 6 CHECK THE FOLLOWING Misfire counts high for cylinder 1. Misfire counts also raised for cylinders 4, 6, 7. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 7, 6). Coil pack 2 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 4,6,7 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 1 CHECK THE FOLLOWING Misfire counts high for cylinder 1. Misfire counts close to normal for cylinder 6. POSSIBLE FAULTS Fuel injector fault cylinder 1. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 1 can cause a misfire fault to be flagged. Fuelling adaptions on bank A may also be affected.
  5. Cylinder 1 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 1 compression. Cylinder 1 leakage. Cylinder 1 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 1. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 1 will cause little or no effect on idle air flow.
  1. DTC P0301 Catalyst Damaging Misfire Cyl 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 1. See 1 under CHECK.
  2. Ignition coil problem cylinders 1 and 6. See 2 under CHECK.
  3. Ignition coil problem cylinders 1, 4, 7, 6. See 3 under CHECK.
  4. Faulty fuel injector cylinder 1. See 4 under CHECK.
  5. Cylinder 1 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 1 CHECK THE FOLLOWING Misfire counts high for cylinder 1. Misfire counts close to normal for cylinder 6. POSSIBLE FAULTS Spark plug problem cylinder 1. HT lead problem cylinder 1. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 6 also.
  2. Ignition Coil Problem Cylinders 1 And 6 CHECK THE FOLLOWING Misfire counts high for cylinder 1. Misfire counts also raised for cylinder 6. POSSIBLE FAULTS Spark plug problem cylinder 1 or 6 - No spark. Open circuit HT lead problem cylinder 1 or 6. Ignition coil problem - coil pack 2 (cylinders 1, 4, 7, 6). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 6 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 1, 4, 7, 6 CHECK THE FOLLOWING Misfire counts high for cylinder 1. Misfire counts also raised for cylinders 4, 6, 7. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 7, 6). Coil pack 2 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 4, 6, 7 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 1 CHECK THE FOLLOWING Misfire counts high for cylinder 1. Misfire counts close to normal for cylinder 6. POSSIBLE FAULTS Fuel injector fault cylinder 1. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 1 can cause a misfire fault to be flagged. Fuelling adaptions on bank A may also be affected.
  5. Cylinder 1 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 1 compression. Cylinder 1 leakage. Cylinder 1 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 1. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 1 will cause little or no effect on idle air flow.
  1. DTC P0302 Emission Relevant Misfire Cyl 2 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 2. See 1 under CHECK.
  2. Ignition coil problem cylinders 2 and 3. See 2 under CHECK.
  3. Ignition coil problem cylinders 2, 3, 5, 8. See 3 under CHECK.
  4. Faulty fuel injector cylinder 2. See 4 under CHECK.
  5. Cylinder 2 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 2 CHECK THE FOLLOWING Misfire counts high for cylinder 2. Misfire counts close to normal for cylinder 3. POSSIBLE FAULTS Spark plug problem cylinder 2. HT lead problem cylinder 2. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 3 also.
  2. Ignition Coil Problem Cylinders 2 And 3 CHECK THE FOLLOWING Misfire counts high for cylinder 2. Misfire counts also raised for cylinder 3. POSSIBLE FAULTS Spark plug problem cylinder 2 or 3 - No spark. Open circuit HT lead problem cylinder 2 or 3. Ignition coil problem - coil pack 1 (cylinders 2, 3, 5, 8). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 3 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 2, 3, 5, 8 CHECK THE FOLLOWING Misfire counts high for cylinder 2. Misfire counts also raised for cylinders 3, 5, 8. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Coil pack 1 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 3,5,8 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 2 CHECK THE FOLLOWING Misfire counts high for cylinder 2. Misfire counts close to normal for cylinder 3. POSSIBLE FAULTS Fuel injector fault cylinder 2. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 2 can cause a misfire fault to be flagged. Fuelling adaptions on bank B may also be affected.
  5. Cylinder 2 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 2 compression. Cylinder 2 leakage. Cylinder 2 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 2. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 2 will cause little or no effect on idle air flow.
  1. DTC P0302 Catalyst Damaging Misfire Cyl 2 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 2. See 1 under CHECK.
  2. Ignition coil problem cylinders 2 and 3. See 2 under CHECK.
  3. Ignition coil problem cylinders 2, 3, 5, 8. See 3 under CHECK.
  4. Faulty fuel injector cylinder 2. See 4 under CHECK.
  5. Cylinder 2 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 2 CHECK THE FOLLOWING Misfire counts high for cylinder 2. Misfire counts close to normal for cylinder 3. POSSIBLE FAULTS Spark plug problem cylinder 2. HT lead problem cylinder 2. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 3 also.
  2. Ignition Coil Problem Cylinders 2 And 3 CHECK THE FOLLOWING Misfire counts high for cylinder 2. Misfire counts also raised for cylinder 3. POSSIBLE FAULTS Spark plug problem cylinder 2 or 3 - No spark. Open circuit HT lead problem cylinder 2 or 3. Ignition coil problem - coil pack 1 (cylinders 2, 3, 5, 8). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 3 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 2, 3, 5, 8 CHECK THE FOLLOWING Misfire counts high for cylinder 2. Misfire counts also raised for cylinders 3, 5, 8. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Coil pack 1 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 3, 5, 8 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 2 CHECK THE FOLLOWING Misfire counts high for cylinder 2. Misfire counts close to normal for cylinder 3. POSSIBLE FAULTS Fuel injector fault cylinder 2. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 2 can cause a misfire fault to be flagged. Fuelling adaptions on bank B may also be affected.
  5. Cylinder 2 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 2 compression. Cylinder 2 leakage. Cylinder 2 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 2. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 2 will cause little or no effect on idle air flow.
  1. DTC P0303 Emission Relevant Misfire Cyl 3 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 3. See 1 under CHECK.
  2. Ignition coil problem cylinders 2 and 3. See 2 under CHECK.
  3. Ignition coil problem cylinders 2, 3, 5, 8. See 3 under CHECK.
  4. Faulty fuel injector cylinder 3. See 4 under CHECK.
  5. Cylinder 3 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 3 CHECK THE FOLLOWING Misfire counts high for cylinder 3. Misfire counts close to normal for cylinder 2. POSSIBLE FAULTS Spark plug problem cylinder 3. HT lead problem cylinder 3. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 2 also.
  2. Ignition Coil Problem Cylinders 2 And 3 CHECK THE FOLLOWING Misfire counts high for cylinder 3. Misfire counts also raised for cylinder 2. POSSIBLE FAULTS Spark plug problem cylinder 2 or 3 - No spark. Open circuit HT lead problem cylinder 2 or 3. Ignition coil problem - coil pack 1 (cylinders 2, 3, 5, 8). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 2 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 2, 3, 5, 8 CHECK THE FOLLOWING Misfire counts high for cylinder 3. Misfire counts also raised for cylinders 2, 5, 8. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Coil pack 1 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 2,5,8 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 3 CHECK THE FOLLOWING Misfire counts high for cylinder 3. Misfire counts close to normal for cylinder 2. POSSIBLE FAULTS Fuel injector fault cylinder 3. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 3 can cause a misfire fault to be flagged. Fuelling adaptions on bank A may also be affected.
  5. Cylinder 3 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 3 compression. Cylinder 3 leakage. Cylinder 3 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 3. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 3 will cause little or no effect on idle air flow.
  1. DTC P0303 Catalyst Damaging Misfire Cyl 3 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 3. See 1 under CHECK.
  2. Ignition coil problem cylinders 2 and 3. See 2 under CHECK.
  3. Ignition coil problem cylinders 2, 3, 5, 8. See 3 under CHECK.
  4. Faulty fuel injector cylinder 3. See 4 under CHECK.
  5. Cylinder 3 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 3 CHECK THE FOLLOWING Misfire counts high for cylinder 3. Misfire counts close to normal for cylinder 2. POSSIBLE FAULTS Spark plug problem cylinder 3. HT lead problem cylinder 3. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 2 also.
  2. Ignition Coil Problem Cylinders 2 And 3 CHECK THE FOLLOWING Misfire counts high for cylinder 3. Misfire counts also raised for cylinder 2. POSSIBLE FAULTS Spark plug problem cylinder 2 or 3 - No spark. Open circuit HT lead problem cylinder 2 or 3. Ignition coil problem - coil pack 1 (cylinders 2, 3, 5, 8). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 2 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 2, 3, 5, 8 CHECK THE FOLLOWING Misfire counts high for cylinder 3. Misfire counts also raised for cylinders 2, 5, 8. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Coil pack 1 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 2, 5, 8 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 3 CHECK THE FOLLOWING Misfire counts high for cylinder 3. Misfire counts close to normal for cylinder 2. POSSIBLE FAULTS Fuel injector fault cylinder 3. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 3 can cause a misfire fault to be flagged. Fuelling adaptions on bank A may also be affected.
  5. Cylinder 3 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 3 compression. Cylinder 3 leakage. Cylinder 3 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 3. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 3 will cause little or no effect on idle air flow.
  1. DTC P0304 Emission Relevant Misfire Cyl 4 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 4. See 1 under CHECK.
  2. Ignition coil problem cylinders 4 and 7. See 2 under CHECK.
  3. Ignition coil problem cylinders 1, 4, 6, 7. See 3 under CHECK.
  4. Faulty fuel injector cylinder 4. See 4 under CHECK.
  5. Cylinder 4 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 4 CHECK THE FOLLOWING Misfire counts high for cylinder 4. Misfire counts close to normal for cylinder 7. POSSIBLE FAULTS Spark plug problem cylinder 4. HT lead problem cylinder 4. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 7 also.
  2. Ignition Coil Problem Cylinders 4 And 7 CHECK THE FOLLOWING Misfire counts high for cylinder 4. Misfire counts also raised for cylinder 7. POSSIBLE FAULTS Spark plug problem cylinder 4 or 7 - No spark. Open circuit HT lead problem cylinder 4 or 7. Ignition coil problem - coil pack 2 (cylinders 1, 4, 6, 7). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 7 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 1, 4, 6, 7 CHECK THE FOLLOWING Misfire counts high for cylinder 4. Misfire counts also raised for cylinders 1, 6, 7. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 6, 7). Coil pack 2 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 1, 6, 7 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 4 CHECK THE FOLLOWING Misfire counts high for cylinder 4. Misfire counts close to normal for cylinder 7. POSSIBLE FAULTS Fuel injector fault cylinder 4. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 4 can cause a misfire fault to be flagged. Fuelling adaptions on bank B may also be affected.
  5. Cylinder 4 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 4 compression. Cylinder 4 leakage. Cylinder 4 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 4. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 4 will cause little or no effect on idle air flow.
  1. DTC P0304 Catalyst Damaging Misfire Cyl 4 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 4. See 1 under CHECK.
  2. Ignition coil problem cylinders 4 and 7. See 2 under CHECK.
  3. Ignition coil problem cylinders 1, 4, 6, 7. See 3 under CHECK.
  4. Faulty fuel injector cylinder 4. See 4 under CHECK.
  5. Cylinder 4 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 4 CHECK THE FOLLOWING Misfire counts high for cylinder 4. Misfire counts close to normal for cylinder 7. POSSIBLE FAULTS Spark plug problem cylinder 4. HT lead problem cylinder 4. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 7 also.
  2. Ignition Coil Problem Cylinders 4 And 7 CHECK THE FOLLOWING Misfire counts high for cylinder 4. Misfire counts also raised for cylinder 7. POSSIBLE FAULTS Spark plug problem cylinder 4 or 7 - No spark. Open circuit HT lead problem cylinder 4 or 7. Ignition coil problem - coil pack 2 (cylinders 1, 4, 6, 7). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 7 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 1, 4, 6, 7 CHECK THE FOLLOWING Misfire counts high for cylinder 4. Misfire counts also raised for cylinders 1, 6, 7. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 6, 7). Coil pack 2 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 1, 6, 7 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 4 CHECK THE FOLLOWING Misfire counts high for cylinder 4. Misfire counts close to normal for cylinder 7. POSSIBLE FAULTS Fuel injector fault cylinder 4. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 4 can cause a misfire fault to be flagged. Fuelling adaptions on bank B may also be affected.
  5. Cylinder 4 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 4 compression. Cylinder 4 leakage. Cylinder 4 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 4. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 4 will cause little or no effect on idle air flow.
  1. DTC P0305 Emission Relevant Misfire Cyl 5 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 5. See 1 under CHECK.
  2. Ignition coil problem cylinders 5 and 8. See 2 under CHECK.
  3. Ignition coil problem cylinders 2, 3, 5, 8. See 3 under CHECK.
  4. Faulty fuel injector cylinder 5. See 4 under CHECK.
  5. Cylinder 5 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 5 CHECK THE FOLLOWING Misfire counts high for cylinder 5. Misfire counts close to normal for cylinder 8. POSSIBLE FAULTS Spark plug problem cylinder 5. HT lead problem cylinder 5. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 8 also.
  2. Ignition Coil Problem Cylinders 5 And 8 CHECK THE FOLLOWING Misfire counts high for cylinder 5. Misfire counts also raised for cylinder 8. POSSIBLE FAULTS Spark plug problem cylinder 5 or 8 - No spark. Open circuit HT lead problem cylinder 5 or 8. Ignition coil problem - coil pack 1 (cylinders 2, 3, 5, 8). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 8 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 2, 3, 5, 8 CHECK THE FOLLOWING Misfire counts high for cylinder 5. Misfire counts also raised for cylinders 2, 3, 8. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Coil pack 1 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 2, 3, 8 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 5 CHECK THE FOLLOWING Misfire counts high for cylinder 5. Misfire counts close to normal for cylinder 8. POSSIBLE FAULTS Fuel injector fault cylinder 5. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 5 can cause a misfire fault to be flagged. Fuelling adaptions on bank A may also be affected.
  5. Cylinder 5 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 5 compression. Cylinder 5 leakage. Cylinder 5 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 5. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 5 will cause little or no effect on idle air flow.
  1. DTC P0305 Catalyst Damaging Misfire Cyl 5 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 5. See 1 under CHECK.
  2. Ignition coil problem cylinders 5 and 8. See 2 under CHECK.
  3. Ignition coil problem cylinders 2, 3, 5, 8. See 3 under CHECK.
  4. Faulty fuel injector cylinder 5. See 4 under CHECK.
  5. Cylinder 5 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 5 CHECK THE FOLLOWING Misfire counts high for cylinder 5. Misfire counts close to normal for cylinder 8. POSSIBLE FAULTS Spark plug problem cylinder 5. HT lead problem cylinder 5. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 8 also.
  2. Ignition Coil Problem Cylinders 5 And 8 CHECK THE FOLLOWING Misfire counts high for cylinder 5. Misfire counts also raised for cylinder 8. POSSIBLE FAULTS Spark plug problem cylinder 5 or 8 - No spark. Open circuit HT lead problem cylinder 5 or 8. Ignition coil problem - coil pack 1 (cylinders 2, 3, 5, 8). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 8 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 2, 3, 5, 8 CHECK THE FOLLOWING Misfire counts high for cylinder 5. Misfire counts also raised for cylinders 2, 3, 8. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Coil pack 1 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 2, 3, 8 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 5 CHECK THE FOLLOWING Misfire counts high for cylinder 5. Misfire counts close to normal for cylinder 8. POSSIBLE FAULTS Fuel injector fault cylinder 5. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 5 can cause a misfire fault to be flagged. Fuelling adaptions on bank A may also be affected.
  5. Cylinder 5 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 5 compression. Cylinder 5 leakage. Cylinder 5 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 5. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 5 will cause little or no effect on idle air flow.
  1. DTC P0306 Emission Relevant Misfire Cyl 6 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 6. See 1 under CHECK.
  2. Ignition coil problem cylinders 1 and 6. See 2 under CHECK.
  3. Ignition coil problem cylinders 1, 4, 7, 6. See 3 under CHECK.
  4. Faulty fuel injector cylinder 6. See 4 under CHECK.
  5. Cylinder 6 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 6 CHECK THE FOLLOWING Misfire counts high for cylinder 6. Misfire counts close to normal for cylinder 1. POSSIBLE FAULTS Spark plug problem cylinder 6. HT lead problem cylinder 6. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 1 also.
  2. Ignition Coil Problem Cylinders 1 and 6 CHECK THE FOLLOWING Misfire counts high for cylinder 6. Misfire counts also raised for cylinder 1. POSSIBLE FAULTS Spark plug problem cylinder 1 or 6 - No spark. Open circuit HT lead problem cylinder 1 or 6. Ignition coil problem - coil pack 2 (cylinders 1, 4, 7, 6). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 1 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 1, 4, 7, 6 CHECK THE FOLLOWING Misfire counts high for cylinder 6. Misfire counts also raised for cylinders 1, 4, 7. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 7, 6). Coil pack 2 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 1,4,7 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 6 CHECK THE FOLLOWING Misfire counts high for cylinder 6. Misfire counts close to normal for cylinder 1. POSSIBLE FAULTS Fuel injector fault cylinder 6. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 6 can cause a misfire fault to be flagged. Fuelling adaptions on bank B may also be affected.
  5. Cylinder 6 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 6 compression. Cylinder 6 leakage. Cylinder 6 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 6. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 6 will cause little or no effect on idle air flow.
  1. DTC P0306 Catalyst Damaging Misfire Cyl 6 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 6. See 1 under CHECK.
  2. Ignition coil problem cylinders 1 and 6. See 2 under CHECK.
  3. Ignition coil problem cylinders 1, 4, 7, 6. See 3 under CHECK.
  4. Faulty fuel injector cylinder 6. See 4 under CHECK.
  5. Cylinder 6 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 6 CHECK THE FOLLOWING Misfire counts high for cylinder 6. Misfire counts close to normal for cylinder 1. POSSIBLE FAULTS Spark plug problem cylinder 6. HT lead problem cylinder 6. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 1 also.
  2. Ignition Coil Problem Cylinders 1 And 6 CHECK THE FOLLOWING Misfire counts high for cylinder 6. Misfire counts also raised for cylinder 1. POSSIBLE FAULTS Spark plug problem cylinder 1 or 6 - No spark. Open circuit HT lead problem cylinder 1 or 6. Ignition coil problem - coil pack 2 (cylinders 1, 4, 7, 6). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 1 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 1, 4, 7, 6 CHECK THE FOLLOWING Misfire counts high for cylinder 6. Misfire counts also raised for cylinders 1, 4, 7. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 7, 6). Coil pack 2 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 1, 4, 7 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 6 CHECK THE FOLLOWING Misfire counts high for cylinder 6. Misfire counts close to normal for cylinder 1. POSSIBLE FAULTS Fuel injector fault cylinder 6. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 6 can cause a misfire fault to be flagged. Fuelling adaptions on bank B may also be affected.
  5. Cylinder 6 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 6 compression. Cylinder 6 leakage. Cylinder 6 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 6. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 6 will cause little or no effect on idle air flow.
  1. DTC P0307 Emission Relevant Misfire Cyl 7 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 7. See 1 under CHECK.
  2. Ignition coil problem cylinders 4 and 7. See 2 under CHECK.
  3. Ignition coil problem cylinders 1, 4, 6, 7. See 3 under CHECK.
  4. Faulty fuel injector cylinder 7. See 4 under CHECK.
  5. Cylinder 7 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 7 CHECK THE FOLLOWING Misfire counts high for cylinder 7. Misfire counts close to normal for cylinder 4. POSSIBLE FAULTS Spark plug problem cylinder 7. HT lead problem cylinder 7. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 4 also.
  2. Ignition Coil Problem Cylinders 4 And 7 CHECK THE FOLLOWING Misfire counts high for cylinder 7. Misfire counts also raised for cylinder 4. POSSIBLE FAULTS Spark plug problem cylinder 4 or 7 - No spark. Open circuit HT lead problem cylinder 4 or 7. Ignition coil problem - coil pack 2 (cylinders 1, 4, 6, 7). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 4 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 1, 4, 6, 7 CHECK THE FOLLOWING Misfire counts high for cylinder 7. Misfire counts also raised for cylinders 1, 4, 6. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 6, 7). Coil pack 2 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 1, 4, 6 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 7 CHECK THE FOLLOWING Misfire counts high for cylinder 7. Misfire counts close to normal for cylinder 4. POSSIBLE FAULTS Fuel injector fault cylinder 7. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 7 can cause a misfire fault to be flagged. Fuelling adaptions on bank A may also be affected.
  5. Cylinder 7 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 7 compression. Cylinder 7 leakage. Cylinder 7 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 7. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 7 will cause little or no effect on idle air flow.
  1. DTC P0307 Catalyst Damaging Misfire Cyl 7 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 7. See 1 under CHECK.
  2. Ignition coil problem cylinders 4 and 7. See 2 under CHECK.
  3. Ignition coil problem cylinders 1, 4, 6, 7. See 3 under CHECK.
  4. Faulty fuel injector cylinder 7. See 4 under CHECK.
  5. Cylinder 7 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 7 CHECK THE FOLLOWING Misfire counts high for cylinder 7. Misfire counts close to normal for cylinder 4. POSSIBLE FAULTS Spark plug problem cylinder 7. HT lead problem cylinder 7. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 4 also.
  2. Ignition Coil Problem Cylinders 4 And 7 CHECK THE FOLLOWING Misfire counts high for cylinder 7. Misfire counts also raised for cylinder 4. POSSIBLE FAULTS Spark plug problem cylinder 4 or 7 - No spark. Open circuit HT lead problem cylinder 4 or 7. Ignition coil problem - coil pack 2 (cylinders 1, 4, 6, 7). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 4 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 1, 4, 6, 7 CHECK THE FOLLOWING Misfire counts high for cylinder 7. Misfire counts also raised for cylinders 1, 4, 6. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 6, 7). Coil pack 2 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 1, 4, 6 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 7 CHECK THE FOLLOWING Misfire counts high for cylinder 7. Misfire counts close to normal for cylinder 4. POSSIBLE FAULTS Fuel injector fault cylinder 7. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 7 can cause a misfire fault to be flagged. Fuelling adaptions on bank A may also be affected.
  5. Cylinder 7 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 7 compression. Cylinder 7 leakage. Cylinder 7 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 7. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 7 will cause little or no effect on idle air flow.
  1. DTC P0308 Emission Relevant Misfire Cyl 8 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 8. See 1 under CHECK.
  2. Ignition coil problem cylinders 5 and 8. See 2 under CHECK.
  3. Ignition coil problem cylinders 2, 3, 5, 8. See 3 under CHECK.
  4. Faulty fuel injector cylinder 8. See 4 under CHECK.
  5. Cylinder 8 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 8 CHECK THE FOLLOWING Misfire counts high for cylinder 8. Misfire counts close to normal for cylinder 5. POSSIBLE FAULTS Spark plug problem cylinder 8. HT lead problem cylinder 8. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 5 also.
  2. Ignition Coil Problem Cylinders 5 & 8 CHECK THE FOLLOWING Misfire counts high for cylinder 8. Misfire counts also raised for cylinder 5. POSSIBLE FAULTS Spark plug problem cylinder 5 or 8 - No spark. Open circuit HT lead problem cylinder 5 or 8. Ignition coil problem - coil pack 1 (cylinders 2, 3, 5, 8). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 5 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 2, 3, 5, 8 CHECK THE FOLLOWING Misfire counts high for cylinder 8. Misfire counts also raised for cylinders 2, 3, 5. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Coil pack 1 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 2, 3, 5 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 8 CHECK THE FOLLOWING Misfire counts high for cylinder 8. Misfire counts close to normal for cylinder 5. POSSIBLE FAULTS Fuel injector fault cylinder 8. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 8 can cause a misfire fault to be flagged. Fuelling adaptions on bank B may also be affected.
  5. Cylinder 8 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 8 compression. Cylinder 8 leakage. Cylinder 8 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 8. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 8 will cause little or no effect on idle air flow.
  1. DTC P0308 Catalyst Damaging Misfire Cyl 8 Drive Cycle C: Signal Out Of Range - Above Maximum
  1. HT problem cylinder 8. See 1 under CHECK.
  2. Ignition coil problem cylinders 5 and 8. See 2 under CHECK.
  3. Ignition coil problem cylinders 2, 3, 5, 8. See 3 under CHECK.
  4. Faulty fuel injector cylinder 8. See 4 under CHECK.
  5. Cylinder 8 combustion efficiency problem. See 5 under CHECK.
  1. HT Problem Cylinder 8 CHECK THE FOLLOWING Misfire counts high for cylinder 8. Misfire counts close to normal for cylinder 5. POSSIBLE FAULTS Spark plug problem cylinder 8. HT lead problem cylinder 8. DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT would probably give elevated misfire counts on cylinder 5 also.
  2. Ignition Coil Problem Cylinders 5 And 8 CHECK THE FOLLOWING Misfire counts high for cylinder 8. Misfire counts also raised for cylinder 5. POSSIBLE FAULTS Spark plug problem cylinder 5 or 8 - No spark. Open circuit HT lead problem cylinder 5 or 8. Ignition coil problem - coil pack 1 (cylinders 2, 3, 5, 8). DIAGNOSTIC HINTS Problems with the ignition coil or open circuit HT also show elevated misfire counts on cylinder 5 due to the wasted spark ignition system.
  3. Ignition Coil Problem Cylinders 2, 3, 5, 8 CHECK THE FOLLOWING Misfire counts high for cylinder 8. Misfire counts also raised for cylinders 2, 3, 5. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Coil pack 1 faulty. DIAGNOSTIC HINTS Problems with the ignition coil pack also show elevated misfire counts on cylinders 2, 3, 5 as sparks for these cylinders are also driven from this coil pack.
  4. Faulty Fuel Injector Cylinder 8 CHECK THE FOLLOWING Misfire counts high for cylinder 8. Misfire counts close to normal for cylinder 5. POSSIBLE FAULTS Fuel injector fault cylinder 8. DIAGNOSTIC HINTS Problems with lack of fuel on cylinder 8 can cause a misfire fault to be flagged. Fuelling adaptions on bank B may also be affected.
  5. Cylinder 8 Combustion Efficiency Problem CHECK THE FOLLOWING Cylinder 8 compression. Cylinder 8 leakage. Cylinder 8 valve timing (CAM). POSSIBLE FAULTS Valve, Piston or CAM problems causing low efficiency on cylinder 8. DIAGNOSTIC HINTS With low efficiency problems, disconnecting injector 8 will cause little or no effect on idle air flow.
  1. DTC P0327 Knock Sensor Fault Bank 1 Drive Cycle B: Signal Out Of Range - Below Minimum
  2. DTC P0328 Knock Sensor Fault Bank 1 Drive Cycle B: Signal Out Of Range - Above Maximum
  1. Connectors C627, ECM C636 (B). See 1 under CHECK.
  2. Open circuit - C627/1 (KW) to C636/49 (KW). See 2 under CHECK.
  3. Open circuit - C627/2 (B) to C636/48 (-). See 3 under CHECK.
  4. Short circuit - C627/1 (KW) to vehicle earth. See 4 under CHECK.
  5. Knock sensor fixing torque incorrect. See 5 under CHECK.
  6. Knock sensor seating face contaminated. See 6 under CHECK.
  7. Knock sensor faulty. See 7 under CHECK.
  1. Connectors C627, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit - C627/1 (KW) To C636/49 (KW) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit - C627/2 (B) To C636/48 (-) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Short Circuit - C627/1 (KW) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  5. Knock Sensor Fixing Torque Incorrect CHECK THE FOLLOWING Check the torque of the knock sensor fixing is as specified in the workshop manual. The sensor fixing MUST be set with a torque wrench. Too high or too low fixing torque will adversely affect the sensor performance. POSSIBLE FAULTS Knock sensor fixing torque set incorrectly.
  6. Knock Sensor Seating Face Contaminated CHECK THE FOLLOWING Remove the knock sensor from the engine and check that the mating face and the screw threads are clean and undamaged. Dirt or damage will effect the efficiency of signal transfer from the engine to the sensor. POSSIBLE FAULTS Knock sensor fixing contaminated or damaged.
  7. Knock Sensor Faulty CHECK THE FOLLOWING Substitute knock sensor for a known good unit. NOTE: It is not possible to check the knock sensor using resistance or voltage measurements. POSSIBLE FAULTS Knock sensor faulty.
  1. DTC P0332 Knock Sensor Fault Bank 2 Drive Cycle B: Signal Out Of Range - Below Minimum
  2. DTC P0333 Knock Sensor Fault Bank 2 Drive Cycle B: Signal Out Of Range - Above Maximum
  1. Connectors C626, ECM C636 (B). See 1 under CHECK.
  2. Open circuit - C626/1 (KB) to C636/36 (KB). See 2 under CHECK.
  3. Open circuit - C626/2 (B) to C636/35 (-). See 3 under CHECK.
  4. Short circuit - C626/1 (KB) to vehicle earth. See 4 under CHECK.
  5. Knock sensor fixing torque incorrect. See 5 under CHECK.
  6. Knock sensor seating face contaminated. See 6 under CHECK.
  7. Knock sensor faulty. See 7 under CHECK.
  1. Connectors C626, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit - C626/1 (KB) To C636/36 (KB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit - C626/2 (B) To C636/35 (-) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Short Circuit - C626/1 (KB) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  5. Knock Sensor Fixing Torque Incorrect CHECK THE FOLLOWING Check the torque of the knock sensor fixing is as specified in the workshop manual. The sensor fixing MUST be set with a torque wrench. Too high or too low fixing torque will adversely affect the sensor performance. POSSIBLE FAULTS Knock sensor fixing torque set incorrectly.
  6. Knock Sensor Seating Face Contaminated CHECK THE FOLLOWING Remove the knock sensor from the engine and check that the mating face and the screw threads are clean and undamaged. Dirt or damage will effect the efficiency of signal transfer from the engine to the sensor. POSSIBLE FAULTS Knock sensor fixing contaminated or damaged.
  7. Knock Sensor Faulty CHECK THE FOLLOWING Substitute knock sensor for a known good unit. NOTE: It is not possible to check the knock sensor using resistance or voltage measurements. POSSIBLE FAULTS Knock sensor faulty.
  1. DTC P0335 Reference Mark Detector Fault (Reluctor Wheel) Drive Cycle A: Signal Implausible
  1. Physical damage to crank sensor or sensor wheel. See 1 under CHECK.
  2. Crank sensor fault. See 2 under CHECK.
  3. Crank sensor mounting position incorrect. See 3 under CHECK.
  4. Use of incorrect materials in crank sensor or wheel mountings. See 4 under CHECK.
  5. Crankshaft sensor or connector C168 water ingress. See 5 under CHECK.
  1. Physical Damage To Crank Sensor Or Sensor Wheel CHECK THE FOLLOWING Inspect crankshaft sensor for evidence of damage. Inspect crankshaft sensor wheel for deformed or missing teeth. POSSIBLE FAULTS Damaged crankshaft sensor. Damaged crankshaft sensor wheel.
  2. Crank Sensor Fault CHECK THE FOLLOWING Check crank sensor by substitution with a known good component. POSSIBLE FAULTS Crankshaft sensor shorted turn fault. Crankshaft sensor low output fault.
  3. Crank Sensor Mounting Position Incorrect CHECK THE FOLLOWING Check crank sensor mounting position. POSSIBLE FAULTS Crankshaft sensor mounting damaged. Crankshaft sensor mounting incorrectly fitted.
  4. Use Of Incorrect Materials In Crank Sensor Or Wheel Mountings CHECK THE FOLLOWING Check for any repairs made to sensor mounting with unauthorized parts. Check correct bolts used for crankshaft wheel mounting. POSSIBLE FAULTS Crankshaft sensor mounting incorrect. Crankshaft sensor wheel fitted with incorrect bolts.
  5. Crankshaft Sensor Or Connector C168 Water Ingress CHECK THE FOLLOWING Check connector C168 for water ingress or contamination. Check crankshaft sensor for water ingress. Check crank sensor by substitution with a known good component. POSSIBLE FAULTS C168 water ingress. Crankshaft sensor water ingress.
  1. DTC P0336 Crank Sensor Tooth Fault (Flywheel Teeth) Drive Cycle A: Signal Implausible
  1. Physical damage to crank sensor or sensor wheel. See 1 under CHECK.
  2. Crank sensor fault. See 2 under CHECK.
  3. Crank sensor mounting position incorrect. See 3 under CHECK.
  4. Use of incorrect materials in crank sensor or wheel mountings. See 4 under CHECK.
  5. Crankshaft sensor or connector C168 water ingress. See 5 under CHECK.
  1. Physical Damage To Crank Sensor Or Sensor Wheel CHECK THE FOLLOWING Inspect crankshaft sensor for evidence of damage. Inspect crankshaft sensor wheel for deformed or missing teeth. POSSIBLE FAULTS Damaged crankshaft sensor. Damaged crankshaft sensor wheel.
  2. Crank Sensor Fault CHECK THE FOLLOWING Check crank sensor by substitution with a known good component. POSSIBLE FAULTS Crankshaft sensor shorted turn fault. Crankshaft sensor low output fault.
  3. Crank Sensor Mounting Position Incorrect CHECK THE FOLLOWING Check crank sensor mounting position. POSSIBLE FAULTS Crankshaft sensor mounting damaged. Crankshaft sensor mounting incorrectly fitted.
  4. Use Of Incorrect Materials In Crank Sensor Or Wheel Mountings CHECK THE FOLLOWING Check for any repairs made to sensor mounting with unauthorized parts. Check correct bolts used for crankshaft wheel mounting. POSSIBLE FAULTS Crankshaft sensor mounting incorrect. Crankshaft sensor wheel fitted with incorrect bolts.
  5. Crankshaft Sensor Or Connector C168 Water Ingress CHECK THE FOLLOWING Check connector C168 for water ingress or contamination. Check crankshaft sensor for water ingress. Check crank sensor by substitution with a known good component. POSSIBLE FAULTS C168 water ingress. Crankshaft sensor water ingress.
  1. DTC P0340 Camshaft Sensor Fault/Valve Timing Error Drive Cycle A: Signal Implausible
  1. Camshaft sensor fault. See 1 under CHECK.
  2. Open circuit - C636/20 (SU) to C176/2 (SU). See 2 under CHECK.
  3. Open circuit - C636/17 (B) to C176/1 (B). See 3 under CHECK.
  4. Voltage incorrect C176/3 (NK) to C176/1 (B). See 4 under CHECK.
  5. Connector C176. See 5 under CHECK.
  6. Crankshaft sensor problem. See 6 under CHECK.
  1. Camshaft Sensor Fault CHECK THE FOLLOWING Inspect camshaft sensor for evidence of damage. Check camshaft sensor by substitution with a known good unit. POSSIBLE FAULTS Faulty camshaft sensor.
  2. Open Circuit - C636/20 (SU) To C176/2 (SU) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit - C636/17 (B) To C176/1 (B) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Voltage Incorrect C176/3 (NK) To C176/1 (B) CHECK THE FOLLOWING Voltage incorrect C176/3 (NK) to C176/1 (B). ACCEPTABLE RESULTS Between 11.5-15.0V. DIAGNOSTIC HINTS If the voltage is not present check F2 Engine Compartment Fusebox and open circuit C176/3 (NK) to C570/1 (NK).
  5. Connector C176 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  6. Crankshaft Sensor Problem CHECK THE FOLLOWING Crankshaft tooth or reference mark fault flag is set. POSSIBLE FAULTS Faulty crankshaft sensor.
  1. DTC P0412 Secondary Air Valve Power Stage Fault Drive Cycle D: Signal Out Of Range - Above Maximum
  2. DTC P0413 Secondary Air Valve Power Stage Fault Drive Cycle D: Signal Missing
  3. DTC P0414 Secondary Air Valve Power Stage Fault Drive Cycle D: Signal Out Of Range - Below Minimum
  1. Connector C0572 C0573 C0575 ECM C634 (B) ECM C636 (B) C641 C0879. See 1 under CHECK.
  2. Open Circuit C636/43 (RG) - C641/1 (RG). See 2 under CHECK.
  3. Short Circuit C636/43 (RG) - Ground. See 3 under CHECK.
  4. Open Circuit C636/42 (US) - C641/3 (US). See 4 under CHECK.
  5. Short Circuit C636/43 (RG) - Ground. See 5 under CHECK.
  6. Open Circuit C641/2 (NK) - C634/8 (NO). See 6 under CHECK.
  7. Short Circuit C641/2 (NK) - Ground. See 7 under CHECK.
  8. Open Circuit C0879/2 (R) - C0573/1 (R). See 8 under CHECK.
  9. Short Circuit C0879/2 (R) - Ground. See 9 under CHECK.
  10. Open Circuit C0879/1 (B) - C0563/1. See 10 under CHECK.
  11. Open Circuit C0575/2 (NG) - ECM. See 11 under CHECK.
  12. Short Circuit C0575/2 (NG) - Ground. See 12 under CHECK.
  13. Open Circuit C0572/3 (NO) - C634/8 (NO). See 13 under CHECK.
  14. Short Circuit C0572/3 (NO) - Ground. See 14 under CHECK.
  15. Fuse 37 (30 Amp). See 15 under CHECK.
  1. Connector C0572 C0573 C0575 ECM C634 (B) ECM C636 (B) C641 C0879 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit C636/43 (RG) - C641/1 (RG) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Short Circuit C636/43 (RG) - Ground SHORT_CIRCUIT Check resistance greater than 5 ohms.
  4. Open Circuit C636/42 (US) - C641/3 (US) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Short Circuit C636/43 (RG) - Ground SHORT_CIRCUIT Check resistance greater than 5 ohms.
  6. Open Circuit C641/2 (NK) - C634/8 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Short Circuit C641/2 (NK) - Ground SHORT_CIRCUIT Check resistance greater than 5 ohms.
  8. Open Circuit C0879/2 (R) - C0573/1 (R) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  9. Short Circuit C0879/2 (R) - Ground SHORT_CIRCUIT Check resistance greater than 5 ohms.
  10. Open Circuit C0879/1 (B) - C0563/1 OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  11. Open Circuit C0575/2 (NG) - ECM OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  12. Short Circuit C0575/2 (NG) - Ground SHORT_CIRCUIT Check resistance greater than 5 ohms.
  13. Open Circuit C0572/3 (NO) - C634/8 (NO) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  14. Short Circuit C0572/3 (NO) - Ground SHORT_CIRCUIT Check resistance greater than 5 ohms.
  15. Fuse 37 (30 Amp) POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  1. DTC P0418 Secondary Air Pump Power Stage (Relay) Fault Drive Cycle D: Signal Missing
  2. DTC P0418 Secondary Air Pump Power Stage (Relay) Fault Drive Cycle D: Signal Out Of Range - Above Maximum
  3. DTC P0418 Secondary Air Pump Power Stage (Relay) Fault Drive Cycle D: Signal Out Of Range - Below Minimum
  1. Secondary air pump relay. See 1 under CHECK.
  2. Secondary air pump M207. See 2 under CHECK.
  3. Short Circuit C0573/1 (R) - C0879/2 (R). See 3 under CHECK.
  4. Open Circuit C0573/1 (R) - C0879/2 (R). See 4 under CHECK.
  5. Open Circuit C0879/1 (B) - C0563/1. See 5 under CHECK.
  1. Secondary Air Pump Relay CHECK THE FOLLOWING Check the secondary air pump relay for any faults or damage. Check Connector C0573/1 (R) is fitted correctly.
  2. Secondary Air Pump M207 CHECK THE FOLLOWING Check the secondary air pump for any faults or damage. DIAGNOSTIC HINTS If Textbook/T4 available, it can be used to confirm any suspected faults. Run the secondary air system diagnostic, as this will tell you if the system is operating correctly.
  3. Short Circuit C0573/1 (R) - C0879/2 (R) SHORT_CIRCUIT Check resistance greater than 5 ohms.
  4. Open Circuit C0573/1 (R) - C0879/2 (R) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Open Circuit C0879/1 (B) - C0563/1 OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  1. DTC P0420 Catalyst Deteriorated Bank 1 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Catalyst aged. See 1 under CHECK.
  2. Catalyst contaminated. See 2 under CHECK.
  3. Catalyst damaged. See 3 under CHECK.
  4. Catalyst overheated. See 4 under CHECK.
  1. Catalyst Aged CHECK THE FOLLOWING The catalyst will appear undamaged. The catalyst element will not rattle if it is moved. POSSIBLE FAULTS Catalyst no longer functioning. DIAGNOSTIC HINTS The Motronic ECM flags this fault when the downstream oxygen sensors switch at the same time as the upstream sensors indicating that the exhaust gas is passing straight through the catalyst without being converted. On a correctly operating system the downstream sensors will not switch as fast as the upstream sensors.
  2. Catalyst Contaminated CHECK THE FOLLOWING The catalyst will appear undamaged. The catalyst element will not rattle if it is moved. POSSIBLE FAULTS The special coating on the catalyst element has become POISONED with a substance that stops the catalyst from working. DIAGNOSTIC HINTS The Motronic ECM flags this fault when the downstream oxygen sensors switch at the same time as the upstream sensors indicating that the exhaust gas is passing straight through the catalyst without being converted. On a correctly operating system the downstream sensors will not switch as fast as the upstream sensors.
  3. Catalyst Damaged CHECK THE FOLLOWING The catalyst may appear undamaged but the catalyst element may rattle if it is moved. POSSIBLE FAULTS The ceramic element of the catalyst has broken up due to mechanical or thermal shock allowing exhaust gas to pass through without conversion. DIAGNOSTIC HINTS The Motronic ECM flags this fault when the downstream oxygen sensors switch at the same time as the upstream sensors indicating that the exhaust gas is passing straight through the catalyst without being converted. On a correctly operating system the downstream sensors will not switch as fast as the upstream sensors.
  4. Catalyst Overheated CHECK THE FOLLOWING Misfire faults stored (Bank A). Fuelling faults stored (Bank A). Evidence of overheating on catalyst. In severe cases there may be evidence that catalyst material has been expelled from the exhaust system. POSSIBLE FAULTS The ceramic element of the catalyst has been overheated or melted due to over fuelling or misfire allowing exhaust gas to pass through without conversion. DIAGNOSTIC HINTS The Motronic ECM flags this fault when the downstream oxygen sensors switch at the same time as the upstream sensors indicating that the exhaust gas is passing straight through the catalyst without being converted. On a correctly operating system the downstream sensors will not switch as fast as the upstream sensors.
  1. DTC P0430 Catalyst Deteriorated Bank 2 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Catalyst aged. See 1 under CHECK.
  2. Catalyst contaminated. See 2 under CHECK.
  3. Catalyst damaged. See 3 under CHECK.
  4. Catalyst overheated. See 4 under CHECK.
  1. Catalyst Aged CHECK THE FOLLOWING The catalyst will appear undamaged. The catalyst element will not rattle if it is moved. POSSIBLE FAULTS Catalyst no longer functioning. DIAGNOSTIC HINTS The Motronic ECM flags this fault when the downstream oxygen sensors switch at the same time as the upstream sensors indicating that the exhaust gas is passing straight through the catalyst without being converted. On a correctly operating system the downstream sensors will not switch as fast as the upstream sensors.
  2. Catalyst Contaminated CHECK THE FOLLOWING The catalyst will appear undamaged. The catalyst element will not rattle if it is moved. POSSIBLE FAULTS The special coating on the catalyst element has become POISONED with a substance that stops the catalyst from working. DIAGNOSTIC HINTS The Motronic ECM flags this fault when the downstream oxygen sensors switch at the same time as the upstream sensors indicating that the exhaust gas is passing straight through the catalyst without being converted. On a correctly operating system the downstream sensors will not switch as fast as the upstream sensors.
  3. Catalyst Damaged CHECK THE FOLLOWING The catalyst may appear undamaged but the catalyst element may rattle if it is moved. POSSIBLE FAULTS The ceramic element of the catalyst has broken up due to mechanical or thermal shock allowing exhaust gas to pass through without conversion. DIAGNOSTIC HINTS The Motronic ECM flags this fault when the downstream oxygen sensors switch at the same time as the upstream sensors indicating that the exhaust gas is passing straight through the catalyst without being converted. On a correctly operating system the downstream sensors will not switch as fast as the upstream sensors.
  4. Catalyst Overheated CHECK THE FOLLOWING Misfire faults stored (Bank B). Fuelling faults stored (Bank B). Evidence of overheating on catalyst. In severe cases there may be evidence that catalyst material has been expelled from the exhaust system. POSSIBLE FAULTS The ceramic element of the catalyst has been overheated or melted due to over fuelling or misfire allowing exhaust gas to pass through without conversion. DIAGNOSTIC HINTS The Motronic ECM flags this fault when the downstream oxygen sensors switch at the same time as the upstream sensors indicating that the exhaust gas is passing straight through the catalyst without being converted. On a correctly operating system the downstream sensors will not switch as fast as the upstream sensors.
  1. DTC P0440 Evaporative Control System Fault Drive Cycle C: Signal Out Of Range - Above Maximum
  1. Canister purge valve fault - stuck open. See 1 under CHECK.
  1. Canister Purge Valve Fault - Stuck Open CHECK THE FOLLOWING Disconnect purge valve. Attempt to suck air through closed valve using suitable tool. POSSIBLE FAULTS Faulty purge valve.
  1. DTC P0442 Evaporative Control System - Small Leak Detected Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Leaking fuel filler cap. See 1 under CHECK.
  2. Leaking vent seal valve. See 2 under CHECK.
  3. Leaking tank protective valve. See 3 under CHECK.
  4. Faulty or missing hose clamp or poor seal. See 4 under CHECK.
  5. Poor seal on fuel tank pressure sensor. See 5 under CHECK.
  6. Fuel tank pressure sensor fault. See 6 under CHECK.
  1. Leaking Fuel Filler Cap CHECK THE FOLLOWING Check fuel filler cap for any visible cause of leakage. Check fuel filler cap seal for contamination. Check fuel filler cap by substitution with known good unit. POSSIBLE FAULTS Faulty fuel filler cap. Fuel filler cap has poor seal.
  2. Leaking Vent Seal Valve CHECK THE FOLLOWING Check purge canister vent seal valve for any visible signs of leakage. Check vent seal valve for contamination with charcoal from purge can. Check vent seal valve by substitution with known good unit. Check vent seal valve attachment to purge canister for soundness. POSSIBLE FAULTS Faulty purge canister vent seal valve. Purge canister vent seal valve contaminated. Purge canister vent seal valve attachment to purge canister leaking.
  3. Leaking Tank Protective Valve CHECK THE FOLLOWING Check fuel tank with suitable pressure test equipment. POSSIBLE FAULTS Faulty fuel tank pressure relief valve.
  4. Faulty Or Missing Hose Clamp Or Poor Seal CHECK THE FOLLOWING All hose couplings and clamps in evaporative loss system. POSSIBLE FAULTS Leakage at hose coupling to due faulty or missing clamp.
  5. Poor Seal On Fuel Tank Pressure Sensor CHECK THE FOLLOWING Attachment of fuel tank pressure sensor to fuel tank. Substitute pressure sensor for known good unit. POSSIBLE FAULTS Faulty seal at fuel tank pressure sensor. Faulty fuel tank pressure sensor.
  6. Fuel Tank Pressure Sensor Fault CHECK THE FOLLOWING Pressure sensor reads close to zero with filler cap removed. If equipment available pressurize the tank and check that the reading on the sensor is accurate. POSSIBLE FAULTS Faulty fuel tank pressure sensor.
  1. DTC P0446 Purge Canister Vent Valve Functionality Fault Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Canister vent seal valve fault - stuck closed or blocked. See 1 under CHECK.
  2. Purge canister blocked. See 2 under CHECK.
  3. Canister purge valve fault - sticking open. See 3 under CHECK.
  4. Fuel tank pressure sensor fault - inaccurate. See 4 under CHECK.
  1. Canister Vent Seal Valve Fault - Stuck Closed Or Blocked CHECK THE FOLLOWING Disconnect vent seal valve from purge can, Attempt to blow through vent seal valve. Visual check of vent seal valve, check for blockage and charcoal contamination. POSSIBLE FAULTS Faulty vent seal valve. Vent seal valve blocked with charcoal from canister.
  2. Purge Canister Blocked CHECK THE FOLLOWING Purge can not blocked. Visual check of purge can - charcoal not broken up (contamination in purge or vent valve). POSSIBLE FAULTS Faulty purge can.
  3. Canister Purge Valve Fault - Sticking Open CHECK THE FOLLOWING Disconnect purge valve. Attempt to suck air through closed valve using suitable tool. Visual check of purge valve - check for charcoal contamination. POSSIBLE FAULTS Faulty purge valve. Purge valve jammed open with charcoal from purge can.
  4. Fuel Tank Pressure Sensor Fault - Inaccurate CHECK THE FOLLOWING Pressure sensor reads close to zero with filler cap removed. If equipment available pressurize the tank and check that the reading on the sensor is accurate. POSSIBLE FAULTS Faulty fuel tank pressure sensor.
  1. DTC P0447 Purge Canister Vent Valve/DMTL Power Stage Fault Drive Cycle C: Signal Missing
  2. DTC P0448 Purge Canister Vent Valve/DMTL Power Stage Fault Drive Cycle C: Signal Out Of Range - Below Minimum
  3. DTC P0449 Purge Canister Vent Valve/DMTL Power Stage Fault Drive Cycle C: Signal Out Of Range - Above Maximum
  1. Purge vent seal valve open circuit. See 1 under CHECK.
  2. Purge vent seal valve short circuit. See 2 under CHECK.
  3. Purge vent seal valve driver (in ECM) stuck on. See 3 under CHECK.
  4. Purge vent seal valve driver (in ECM) stuck off. See 4 under CHECK.
  5. Fuse condition - F2 Engine Compartment. See 5 under CHECK.
  6. Fusebox Open circuit - C133/1 (NK) to C573/2 (NK). See 6 under CHECK.
  7. Open circuit - C133/2 (SY) to C636/52 (SY). See 7 under CHECK.
  8. Connector(s) C133, ECM C636 (B). See 8 under CHECK.
  1. Purge Vent Seal Valve Open Circuit OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Purge Vent Seal Valve Short Circuit SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. Purge Vent Seal Valve Driver (In ECM) Stuck On CHECK THE FOLLOWING Purge vent seal valve driver (in ECM) stuck on. POSSIBLE FAULTS Faulty ECM - Valve always energized (closed) when ignition on. Harness cable connected to C133/2 (SY) shorted to ground - Valve always energized (closed). DIAGNOSTIC HINTS Use multimeter to manually check components.
  4. Purge Vent Seal Valve Driver (In ECM) Stuck Off CHECK THE FOLLOWING Purge vent seal valve driver (in ECM) stuck off. POSSIBLE FAULTS Faulty ECM - Valve never energized (always open). Harness cable connected to C133/2 (SY) shorted to battery positive - Valve never energized (always open). DIAGNOSTIC HINTS Use multimeter to manually check components.
  5. Fuse condition - F2 Engine Compartment Fusebox POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  6. Open Circuit - C133/1 (NK) To C573/2 (NK) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit - C133/2 (SY) To C636/52 (SY) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  8. Connector(s) C133, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0451 Fuel Tank Pressure Sensor Fault Drive Cycle C: Signal Implausible
  2. DTC P0452 Fuel Tank Pressure Sensor Fault Drive Cycle C: Signal Out Of Range - Below Minimum
  3. DTC P0453 Fuel Tank Pressure Sensor Fault Drive Cycle C: Signal Out Of Range - Above Maximum
  1. Fuel tank pressure sensor fault. See 1 under CHECK.
  2. Open circuit C132/3 (GK) to C637/14 (GK). See 2 under CHECK.
  3. Open circuit C132/2 (RB) to C636/6 (RB). See 3 under CHECK.
  4. 5V sensor supply voltage C132/1 (R). See 4 under CHECK.
  5. Connectors C132, ECM C636 (B), ECM C637 (B). See 5 under CHECK.
  1. Fuel Tank Pressure Sensor Fault CHECK THE FOLLOWING Sensor pipe to fuel tank or vent port to open air are not blocked. Open circuit, voltage or connector problems are not present. Check sensor by substitution with a known good unit. POSSIBLE FAULTS Faulty pressure sensor. Pressure sensor vacuum or reference ports blocked.
  2. Open Circuit C132/3 (GK) To C637/14 (GK) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C132/2 (RB) To C636/6 (RB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. 5 Volt Sensor Supply Voltage C132/1 (R) CHECK THE FOLLOWING 5 volt sensor supply voltage C132/1 (R). ACCEPTABLE RESULTS Between 4.5-5.5V. DIAGNOSTIC HINTS If the voltage is too high a short circuit to battery or faulty ECM should be suspected. If the voltage is too low an open circuit or connector problem should be suspected.
  5. Connectors C132, ECM C636 (B), ECM C637 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P0455 Evaporative Control System - Large Leak Detected Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Fuel filler cap missing. See 1 under CHECK.
  2. Disconnected hose. See 2 under CHECK.
  3. Disconnected fuel tank pressure sensor. See 3 under CHECK.
  4. Clogged hose. See 4 under CHECK.
  5. Clogged fuel tank pressure sensor line. See 5 under CHECK.
  6. Faulty Purge valve - does not open. See 6 under CHECK.
  7. Fuel tank pressure sensor fault. See 7 under CHECK.
  1. Fuel Filler Cap Missing CHECK THE FOLLOWING Check fuel filler cap is fitted correctly and not leaking. POSSIBLE FAULTS Faulty or missing fuel filler cap.
  2. Disconnected Hose CHECK THE FOLLOWING Check all hose connections in evaporative loss system: Hoses in fuel tank filler assembly. Hoses connecting fuel tank filler assembly to purge canister. POSSIBLE FAULTS Faulty hose or hose connection.
  3. Disconnected Fuel Tank Pressure Sensor CHECK THE FOLLOWING Visual check of the pipe connecting fuel tank pressure sensor to fuel tank. Monitor fuel tank pressure reading on real time data and rock vehicle to cause fuel slosh. Pressure reading should vary (Fuel tank must be nearly full). POSSIBLE FAULTS Fuel tank pressure sensor pipe disconnected.
  4. Clogged Hose CHECK THE FOLLOWING Hose connecting fuel tank filler assembly to purge canister not blocked. POSSIBLE FAULTS Clogged hose between fuel tank and purge canister.
  5. Clogged Fuel Tank Pressure Sensor Line CHECK THE FOLLOWING Disconnect pipe connecting fuel tank pressure sensor to fuel tank, attempt to blow through pipe. Monitor fuel tank pressure reading on real time data and rock vehicle to cause fuel slosh. Pressure reading should vary (Fuel tank must be nearly full). POSSIBLE FAULTS Fuel tank pressure sensor pipe blocked.
  6. Faulty Purge Valve - Does Not Open CHECK THE FOLLOWING Visual check of purge valve for blockage or damage. Check purge valve by substituting a known good unit. POSSIBLE FAULTS Purge valve blocked or jammed.
  7. Fuel Tank Pressure Sensor Fault CHECK THE FOLLOWING Pressure sensor reads close to zero with filler cap removed. If equipment available pressurize the tank and check that the reading on the sensor is accurate. POSSIBLE FAULTS Faulty fuel tank pressure sensor.
  1. DTC P0500 Vehicle Speed Sensor Signal Error Drive Cycle B: Signal Missing
  2. DTC P0501 Vehicle Speed Sensor Signal Error Drive Cycle B: Signal Implausible
  1. Connectors C504, C290, ECM C637 (B). See 1 under CHECK.
  2. Open circuit - C637/22 (KG) to C504/3 (KG). See 2 under CHECK.
  3. ABS or Wheel sensor fault. See 3 under CHECK.
  1. Connectors C504, C290, ECM C637 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit - C637/22 (KG) To C504/3 (KG) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. ABS Or Wheel Sensor Fault CHECK THE FOLLOWING Carry out diagnostic checks on the ABS system. Check that ABS system can measure road speed correctly. Check engine speed measured by ABS on road test or rolling road. NOTE: The Motronic will not measure road speed if the engine is not running. POSSIBLE FAULTS Faulty ABS speed sensor or wiring. Faulty ABS ECU.
  1. DTC P0505 Blocked Idle Air Control Valve Drive Cycle A: Signal Out Of Range - Above Maximum
  2. DTC P0505 Blocked Idle Air Control Valve Drive Cycle A: Signal Out Of Range - Below Minimum
  1. IACV Jammed. See 1 under CHECK.
  2. IACV blocked. See 2 under CHECK.
  3. IACV Incorrectly fitted. See 3 under CHECK.
  1. IACV Jammed CHECK THE FOLLOWING Idle Air Control Valve mechanically jammed. POSSIBLE FAULTS Idle Air Control Valve Faulty.
  2. IACV Blocked CHECK THE FOLLOWING Idle Air Control Valve or pipework blocked. POSSIBLE FAULTS Idle Air Control Valve Faulty. Pipework or valve blockage.
  3. IACV Incorrectly Fitted CHECK THE FOLLOWING Idle Air Control Valve fitted incorrectly (large air leak). POSSIBLE FAULTS Idle Air Control Valve very loose. Large air leak near idle air control valve.
  1. DTC P0560 Battery Voltage Not Plausible Drive Cycle A: Signal Missing.
  2. DTC P0562 Battery Voltage Not Plausible Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P0563 Battery Voltage Not Plausible Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Vehicle was jump started or charged at high voltage. See 1 under CHECK.
  2. Battery connections/condition. See 2 under CHECK.
  3. Connector(s) ECM C634 (B), ECM C635 (B), ECM C636 (B). See 3 under CHECK.
  4. Alternator connections/condition. See 4 under CHECK.
  1. Vehicle Was Jump Started Or Charged At High Voltage CHECK THE FOLLOWING Has the vehicle been jump started or charged at high voltage? INFORMATION This fault will be logged by the ECM if the battery voltage is measured at about 24 volts or higher. So long as there is a known cause for the high voltage this fault can be safely ignored. Clear the fault flags after checking for any further faults logged by the ECM.
  2. Battery Connections/Condition VOLTAGE_12 Check voltage 10.0-14.0 volts.
  3. Connector(s) ECM C634 (B), ECM C635 (B), ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  4. Alternator Connections/Condition CHECK THE FOLLOWING Alternator connections are sound. Alternator is functioning correctly. POSSIBLE FAULTS Faulty alternator connections. Faulty alternator.
  1. DTC P0600 CAN Interface Timeout Transmission Control Module Drive Cycle A: Signal Missing
  1. Connectors C193, ECM C637 (B). See 1 under CHECK.
  2. Open circuit - C193/16 (W) to C637/36 (W). See 2 under CHECK.
  3. Open circuit - C193/44 (Y) to C637/37 (Y). See 3 under CHECK.
  4. Short circuit - C193/16 (W) to vehicle earth. See 4 under CHECK.
  5. Short circuit - C193/44 (Y) to vehicle earth. See 5 under CHECK.
  6. Transmission control unit fault. See 6 under CHECK.
  7. ECM fault. See 7 under CHECK.
  1. Connectors C193, ECM C637 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit - C193/16 (W) To C637/36 (W) OPEN_CIRCUIT Check resistance less than 1 M/ohmohm.
  3. Open Circuit - C193/44 (Y) To C637/37 (Y) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Short Circuit - C193/16 (W) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  5. Short Circuit - C193/44 (Y) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  6. Transmission Control Unit Fault CHECK THE FOLLOWING Run transmission control unit diagnostics. POSSIBLE FAULTS Transmission control unit fault.
  7. ECM Fault CHECK THE FOLLOWING Eliminate other possible causes of this fault. Check that transmission control unit diagnostics also reports a CAN interface timeout fault. POSSIBLE FAULTS Faulty ECM.
  1. DTC P0601 Control Unit Defective (ROM) Drive Cycle A: Signal Implausible
  1. Battery connections/condition. See 1 under CHECK.
  2. Severe environmental conditions. See 2 under CHECK.
  3. Faulty Motronic ECM. See 3 under CHECK.
  1. Battery Connections/Condition VOLTAGE_12 Check voltage 10.0-14.0 volts.
  2. Severe Environmental Conditions CHECK THE FOLLOWING ECM has been operated at extremely high ambient temperature. INFORMATION The ECM may temporarily fail if it's temperature rises to about 130°C (266°F). This would not normally be expected to happen even in ambient temperatures greater than 40°C (104°F).
  3. Faulty Motronic ECM CHECK THE FOLLOWING Permanent supply fault flag is not set. Freeze frame data for battery voltage logged when fault occurred was greater than 6 volts. Clear fault and monitor for re-occurrence. POSSIBLE FAULTS Faulty Motronic ECM.
  1. DTC P0603 Values In Fault Memory Not Plausible Drive Cycle A: Signal Implausible
  1. Battery connections/condition. See 1 under CHECK.
  2. Severe environmental conditions. See 2 under CHECK.
  3. Faulty Motronic ECM. See 3 under CHECK.
  1. Battery Connections/Condition VOLTAGE_12 Check voltage 10.0-14.0 volts.
  2. Severe Environmental Conditions CHECK THE FOLLOWING ECM has been operated at extremely high ambient temperature. INFORMATION The ECM may temporarily fail if it's temperature rises to about 130°C (266°F). This would not normally be expected to happen even in ambient temperatures greater than 40°C (104°F).
  3. Faulty Motronic ECM CHECK THE FOLLOWING Permanent supply fault flag is not set. Freeze frame data for battery voltage logged when fault occurred was greater than 6 volts. Clear all faults and monitor for re-occurrence. POSSIBLE FAULTS If fault repeatedly reoccurs - faulty Motronic ECM.
  1. DTC P0603 Control Unit Defective (xRAM) Drive Cycle A: Signal Implausible
  1. Battery connections/condition. See 1 under CHECK.
  2. Severe environmental conditions. See 2 under CHECK.
  3. Faulty Motronic ECM. See 3 under CHECK.
  1. Battery Connections/Condition VOLTAGE_12 Check voltage 10.0-14.0 volts.
  2. Severe Environmental Conditions CHECK THE FOLLOWING ECM has been operated at extremely high ambient temperature. INFORMATION The ECM may temporarily fail if it's temperature rises to about 130°C (266°F). This would not normally be expected to happen even in ambient temperatures more than 40°C (104°F).
  3. Faulty Motronic ECM CHECK THE FOLLOWING Permanent supply fault flag is not set. Freeze frame data for battery voltage logged when fault occurred was more than 6 volts. Clear fault and monitor for reoccurrence. POSSIBLE FAULTS Faulty Motronic ECM.
  1. DTC P0604 Control Unit Defective (iRAM) Drive Cycle A: Signal Implausible
  1. Battery connections/condition. See 1 under CHECK.
  2. Severe environmental conditions. See 2 under CHECK.
  3. Faulty Motronic ECM. See 3 under CHECK.
  1. Battery Connections/Condition VOLTAGE_12 Check voltage 10.0-14.0 volts.
  2. Severe Environmental Conditions CHECK THE FOLLOWING ECM has been operated at extremely high ambient temperature. INFORMATION The ECM may temporarily fail if it's temperature rises to about 130°C (266°F). This would not normally be expected to happen even in ambient temperatures more than 40°C (104°F).
  3. Faulty Motronic ECM CHECK THE FOLLOWING Permanent supply fault flag is not set. Environmental condition 'battery voltage' logged as more than 6 volts when fault occurred. Clear fault and monitor for reoccurrence. POSSIBLE FAULTS Faulty Motronic ECM.
  1. DTC P0606 Knock Control Self Test Pulse Fault Drive Cycle A: Signal Out Of Range - Below Minimum
  1. ECM fault. See 1 under CHECK.
  1. ECM Fault CHECK THE FOLLOWING Check if vehicle has had problems with discharged battery or cutting out. This would indicate a problem with the ECM harness or 12 volt battery supply. If these problems are not present check ECM by substitution with a known good unit. POSSIBLE FAULTS Faulty ECM.
  1. DTC P0606 Knock Control Self Test Zero Pulse Fault Drive Cycle A: Signal Implausible
  1. ECM fault. See 1 under CHECK.
  1. ECM Fault CHECK THE FOLLOWING Check if vehicle has had problems with discharged battery or cutting out. This would indicate a problem with the ECM harness or 12 volt battery supply. If these problems are not present check ECM by substitution with a known good unit. POSSIBLE FAULTS Faulty ECM.
  1. DTC P0650 Malfunction Indicator Lamp (MIL) Fault Drive Cycle A: Signal Out Of Range - Above Maximum
  1. MIL harness short circuit. See 1 under CHECK.
  2. Instrument pack MIL problem. See 2 under CHECK.
  3. Motronic ECM fault. See 3 under CHECK.
  1. MIL Harness Short Circuit CHECK THE FOLLOWING ECM reports MIL output overload. Harness cable connected to C233/13 (RS) shorted to battery positive - MIL never illuminated. POSSIBLE FAULTS Harness C233/13 (RS) shorted to battery positive. DIAGNOSTIC HINTS Use multimeter to manually check components.
  2. Instrument Pack MIL Problem CHECK THE FOLLOWING ECM reports MIL output overload. If Textbook/T4 available run warnings and sounders diagnostic to check instrument pack function. POSSIBLE FAULTS Problem with instrument pack MIL input. DIAGNOSTIC HINTS Use multimeter to manually check components.
  3. Motronic ECM Fault CHECK THE FOLLOWING MIL never illuminates. Instrument pack (warnings and sounders) diagnostic shows no problem and no short circuit present. Check ECM by substitution with a known good unit. POSSIBLE FAULTS Faulty Motronic ECM.
  1. DTC P0654 Engine Speed Signal (Power Stage) Drive Cycle A: Signal Missing
  2. DTC P0654 Engine Speed Signal (Power Stage) Drive Cycle A: Signal Out Of Range - Above Maximum
  3. DTC P0654 Engine Speed Signal (Power Stage) Drive Cycle A: Signal Out Of Range - Below Minimum
  1. Short circuit C637/17 (WS) to vehicle +12 volt. See 1 under CHECK.
  2. Short circuit C637/17 (WS) to vehicle earth. See 2 under CHECK.
  3. Open circuit C230/15 (WS) to C637/17 (WS). See 3 under CHECK.
  4. Connector(s) C230, ECM C637 (B). See 4 under CHECK.
  5. Faulty instrument pack. See 5 under CHECK.
  6. Faulty ECM. See 6 under CHECK.
  1. Short Circuit C637/17 (WS) To Vehicle +12 volt SHORT_CIRCUIT Check resistance greater than 5 ohms.
  2. Short circuit C637/17 (WS) to vehicle earth OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C230/15 (WS) To C637/17 (WS) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Connector(s) C230, ECM C637 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  5. Faulty Instrument Pack CHECK THE FOLLOWING Eliminate any possible harness or connector faults. Check instrument pack by substituting a known good unit. POSSIBLE FAULTS Faulty instrument pack.
  6. Faulty ECM CHECK THE FOLLOWING Eliminate all other fault possibilities before suspecting the ECM. Failure of this component is unlikely. Check ECM by substituting a known good unit. POSSIBLE FAULTS ECM Faulty.
  1. DTC P0703 Solenoid Valve Lockup Clutch Check (S/C To +12 volt)
  1. C193/32 (SO) shorted to +12 volt. See 1 under CHECK.
  2. ECU fault. See 2 under CHECK.
  1. C193/32 (SO) Shorted To +12 volt CHECK THE FOLLOWING C193/32 (SO) shorted to +12 volt. Disconnect EAT C193 before measuring voltage between C193/32 (SO) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/32 (SO) for short circuit to +12 volt.
  2. ECU Fault CHECK THE FOLLOWING Ensure that the check for short to +12 volt has been carried out. Check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P0705 Position Switch Monitoring
  1. Position switch 12 volt supply fault. See 1 under CHECK.
  2. General harness problem (position switch). See 2 under CHECK.
  3. Connectors C675, EAT C193. See 3 under CHECK.
  4. L1 open circuit C193/36 (UP) to C675/9 (UP). See 4 under CHECK.
  5. L1 short circuit to +12 volt C675/9 (UP). See 5 under CHECK.
  6. L2 open circuit C193/8 (UB) to C675/10 (UB). See 6 under CHECK.
  7. L2 short circuit to +12 volt C675/10 (UB). See 7 under CHECK.
  8. L3 open circuit C193/37 (UG) to C675/7 (UG). See 8 under CHECK.
  9. L3 short circuit to +12 volt C675/7 (UG). See 9 under CHECK.
  10. L4 open circuit C193/9 (UW) to C675/6 (UW). See 10 under CHECK.
  11. L4 short circuit to +12 volt C675/6 (UW). See 11 under CHECK.
  12. Faulty position switch (PRND). See 12 under CHECK.
  13. Intermittent fault (position monitoring). See 13 under CHECK.
  14. Short circuit between lines L1, L2, L3 or L4. See 14 under CHECK.
  15. Position switch mechanical alignment fault. See 15 under CHECK.
  1. Position Switch 12 Volt Supply Fault CHECK THE FOLLOWING CHECK 1 With all connectors in place, as the position switch is moved the reading on the right hand display of Textbook/T4 remains as (0, 0, 0, 0) INVALID F1 (Indicating no 12 volt supply). If display does not remain as INVALID F1 then there is no supply fault present. NOTE: If Textbook/T4 not available, use Live Data reading function on Scan Tool (see Scan Tool manufacturers handbook for detailed instruction). CHECK 2 With connector C675 disconnected, using a multimeter measure the voltage between C675/8 (NP) and vehicle earth. If this remains below 10 Volts then the fault is present. POSSIBLE FAULTS BCM is not generating the 12 volt supply for the position switch. Open circuit C675/8 (NP) to C663/10 (NP). DIAGNOSTIC HINTS If Textbook/T4 available, run BCM diagnostics to check the position switch supply. Ensure ignition OFF and use a multimeter to check for open circuit.
  2. General Harness Problem (Position Switch) CHECK THE FOLLOWING Move the gear position selector switch slowly through all positions. The positions shown on the two displays should always agree and should correspond to the position of the selector switch. The right hand display may display INTERMEDIATE between gear selections. NOTE: If Textbook/T4 not available, use Live Data reading function on Scan Tool (see Scan Tool manufacturers handbook for detailed instruction). All of these lines should switch between "0" and "1" during at least one gear selection. Any line continuously at "0" may be shorted to ground or open circuit. Any line continuously at "1" may be shorted to 12 volt. Any lines which always change to the same value at the same time may be shorted together. Otherwise if 'Invalid' gear positions are displayed there may be a problem with the switch. DIAGNOSTIC HINTS Where faulty lines are identified use a multimeter to check the appropriate line for open or short circuit.
  3. Connectors C675, EAT C193 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  4. L1 Open Circuit C193/36 (UP) To C675/9 (UP) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. L1 Short Circuit To +12 volt C675/9 (UP) CHECK THE FOLLOWING L1 short circuit to 12 volt C675/9 (UP). Disconnect C675 before measuring voltage between C675/9 (UP) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C675/9 (UP) for short circuit to 12 volt.
  6. L2 Open Circuit C193/8 (UB) To C675/10 (UB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. L2 Short Circuit To +12 volt C675/10 (UB) CHECK THE FOLLOWING L2 short circuit to +12 volt C675/10 (UB). Disconnect C675 before measuring voltage between C675/10 (UB) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C675/10 (UB) for short circuit to 12 volt.
  8. L3 Open Circuit C193/37 (UG) To C675/7 (UG) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  9. L3 Short Circuit To +12 volt C675/7 (UG) CHECK THE FOLLOWING L3 short circuit to 12 volt C675/7 (UG). Disconnect C675 before measuring voltage between C675/7 (UG) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C675/7 (UG) for short circuit to 12 volt.
  10. L4 Open Circuit C193/9 (UW) To C675/6 (UW) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  11. L4 Short Circuit To +12 volt C675/6 (UW) CHECK THE FOLLOWING L4 short circuit to +12 volt C675/6 (UW). Disconnect C675 before measuring voltage between C675/6 (UW) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C675/6 (UW) for short circuit to 12 volt.
  12. Faulty Position Switch (PRND) CHECK THE FOLLOWING Move the gear position selector switch slowly through all positions. The positions shown on the two displays should always agree and should correspond to the position of the selector switch. The right hand display may display 'Intermediate' between gear selections. NOTE: If Textbook/T4 not available, use Live Data reading function on Scan Tool (see Scan Tool manufacturers handbook for detailed instruction) All of the selector lines (L1, L2, L3, L4) should switch between "0" and "1" during at least one gear selection. Any line continuously at "0" or "1" may indicate a switch problem. If INVALID gear positions are displayed but each line has switched between "0" and "1" at least once then there is a problem with the switch. If INTERMEDIATE values are displayed when the position switch is correctly set to a selection position then the switch is faulty. POSSIBLE FAULTS Faulty gear selector position switch.
  13. Intermittent Fault (Position Monitoring) CHECK THE FOLLOWING Ensure the fault is not currently present before diagnosing an intermittent fault. Check the FREEZE FRAME information logged with the fault code. If the battery voltage is shown as less than 8 volts then low battery voltage may be causing the problem. Check the position switch code. This code indicates the last valid state of the position switch selector before the problem occurred. Use the list below to interpret the code: 0 0,0,0,0 (Invalid F1) 1 1,0,0,0 (P) 2 0,1,0,0 (R) 3 1,1,0,0 (Intermediate Z1) 4 0,0,1,0 (1) 5 1,0,1,0 (Intermediate Z2) 6 0,1,1,0 (Invalid F2) 7 1,1,1,0 (N) 8 0,0,0,1 (2) 9 1,0,0,1 (Invalid F3) 10 0,1,0,1 (Invalid F5) 11 1,1,0,1 (Invalid F4) 12 0,0,1,1 (Intermediate Z4) 13 1,0,1,1 (D) 14 0,1,1,1 (3) 15 1,1,1,1 (Intermediate Z3) To determine which line caused the fault look for an invalid code which is the same as the valid code except for a single line changed from a "1" to a "0". POSSIBLE FAULTS Faulty harness, connector or position switch.
  14. Short Circuit Between Lines L1, L2, L3 Or L4 CHECK THE FOLLOWING CHECK 1 Move the gear position selector switch slowly through all positions. If using Textbook/T4, the positions shown on the right hand display should change each time the gear position is changed. The reading should change from a valid gear through an INTERMEDIATE value and then back to a valid gear as the switch is moved from one gear position to the next. If Textbook/T4 not available, use Live Data reading function on Scan Tool (see Scan Tool manufacturers handbook for detailed instruction). Carefully observe the individual gear selection lines (L1, L2, L3, L4) as the switch is moved. If two of these lines always change to the same value at the same time it is possible that these two lines are shorted together. CHECK 2 Ensure ignition OFF With connector C675 disconnected, using a multimeter measure the resistance between any two suspected select lines: Select line L1 C193/36 (UP) Select line L2 C193/8 (UB) Select line L3 C193/37 (UG) Select line L4 C193/9 (UW) Acceptable range more than 500 Ohms
  15. Position Switch Mechanical Alignment Fault CHECK THE FOLLOWING Move the gear position selector switch slowly through all positions. If using Textbook/T4, the positions shown on the display should always agree with the mechanical position of the selector switch. The display may display INTERMEDIATE between gear selections but should NOT display INTERMEDIATE when the selector is in position to select a gear. If Textbook/T4 not available, use Live Data reading function on Scan Tool (see Scan Tool manufacturers handbook for detailed instruction). DIAGNOSTIC HINTS If Intermediate or the incorrect gear is displayed refer to the workshop manual and adjust the gear selector.
  1. DTC P0705 Position Switch During Cranking
  1. Position switch monitoring (permanent) fault set. See 1 under CHECK.
  2. Engine speed measurement fault set in ECM. See 2 under CHECK.
  3. BCU receiving incorrect input from position switch. See 3 under CHECK.
  1. Position Switch Monitoring (Permanent) Fault Set CHECK THE FOLLOWING Check if Position switch monitoring (permanent) fault flag is set. If set then diagnose the fault. POSSIBLE FAULTS Position switch monitoring (permanent) fault present.
  2. Engine Speed Measurement Fault Set In ECM CHECK THE FOLLOWING Read ECM fault codes and check if any crankshaft sensor or engine speed measurement faults are set. Any faults present should be rectified. POSSIBLE FAULTS Engine speed measurement fault set in ECM.
  3. BCU Receiving Incorrect Input From Position Switch CHECK THE FOLLOWING If Textbook/T4 available, run diagnostics on BCM and check that the BCU is receiving the correct input from the position switch. POSSIBLE FAULTS BCM not receiving correct position switch signals.
  1. DTC P0721 Downshift Safety Monitoring
  1. Engine management ECM engine speed fault. See 1 under CHECK.
  2. Connectors C243, EAT C193. See 2 under CHECK.
  3. Open circuit shaft speed sensor C193/14 (B) to C193/42 (R). See 3 under CHECK.
  4. Open circuit C243/E (K) to C193/42 (R). See 4 under CHECK.
  5. Open circuit C243/F (B) to C193/14 (B). See 5 under CHECK.
  6. Shaft speed electrical interference. See 6 under CHECK.
  7. Shaft speed sensor fault. See 7 under CHECK.
  8. Torque converter mechanical fault. See 8 under CHECK.

Discovery Series II, Range Rover (LP) from 1999 model year . Possible causes

  1. Engine Management ECM Engine Speed Fault CHECK THE FOLLOWING Read ECM fault codes and diagnose any engine speed, crankshaft sensor or related fault codes set. POSSIBLE FAULTS Fault codes set in engine management ECM.
  2. Connectors C243, EAT C193 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  3. Open Circuit Shaft Speed Sensor C193/14 (B) To C193/42 (R) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Open Circuit C243/E (K) To C193/42 (R) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Open Circuit C243/F (B) To C193/14 (B) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  6. Shaft Speed Electrical Interference CHECK THE FOLLOWING With the engine running and the position switch in 'P' the shaft speed should measure 0 RPM. If the reading is not 0 RPM then there may be a problem with electrical interference. Check the connections to the screen around the output shaft sensor wiring. POSSIBLE FAULTS Faulty output shaft sensor wiring. Faulty output shaft sensor.
  7. Shaft Speed Sensor Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings do not maintain a fixed ratio the output shaft sensor may be faulty. POSSIBLE FAULTS Faulty output shaft sensor.
  8. Torque Converter Mechanical Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings maintain a fixed ratio the torque converter may be faulty. POSSIBLE FAULTS Transmission torque converter mechanical fault.
  1. DTC P0722 Stall Speed Monitoring
  1. Connectors C243, EAT C193. See 1 under CHECK.
  2. Open circuit shaft speed sensor C193/14 (B) to C193/42 (R). See 2 under CHECK.
  3. Open circuit C243/E (K) to C193/42 (R). See 3 under CHECK.
  4. Open circuit C243/F (B) to C193/14 (B). See 4 under CHECK.
  5. Shaft speed electrical interference. See 5 under CHECK.
  6. Shaft speed sensor fault. See 6 under CHECK.
  7. Torque converter mechanical fault. See 7 under CHECK.
  1. Connectors C243, EAT C193 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit Shaft Speed Sensor C193/14 (B) To C193/42 (R) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C243/E (K) To C193/42 (R) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Open Circuit C243/F (B) To C193/14 (B) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Shaft Speed Electrical Interference CHECK THE FOLLOWING NOTE: Use Live Data reading to display the output shaft speed as measured by the transmission ECU. With the engine running and the position switch in "P" the shaft speed should measure 0 RPM. If the reading is not 0 RPM then there may be a problem with electrical interference. Check the connections to the screen around the output shaft sensor wiring. POSSIBLE FAULTS Faulty output shaft sensor wiring. Faulty output shaft sensor.
  6. Shaft Speed Sensor Fault CHECK THE FOLLOWING NOTE: Use Live Data reading to display the output shaft speed as measured by the transmission ECU. Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings do not maintain a fixed ratio the output shaft sensor may be faulty. POSSIBLE FAULTS Faulty output shaft sensor.
  7. Torque Converter Mechanical Fault CHECK THE FOLLOWING NOTE: Use Live Data reading to display the output shaft speed as measured by the transmission ECU. Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings maintain a fixed ratio the torque converter may be faulty. POSSIBLE FAULTS Transmission torque converter mechanical fault.
  1. DTC P0731 Gear Ratio Monitoring (1st Gear)
  1. Output shaft signal not to specification. See 1 under CHECK.
  2. Engine management ECM faults present. See 2 under CHECK.
  3. Open circuit C243/E (K) to C193/42 (R). See 3 under CHECK.
  4. Open circuit C243/F (B) to C193/14 (B). See 4 under CHECK.
  5. Shaft speed electrical interference. See 5 under CHECK.
  6. Connectors C243, EAT C193. See 6 under CHECK.
  7. Open circuit shaft speed sensor C193/14 (B) to C193/42 (R). See 7 under CHECK.
  8. Shaft speed sensor fault. See 8 under CHECK.
  9. Torque converter mechanical fault. See 9 under CHECK.
  10. Gearbox mechanical fault. See 10 under CHECK.
  1. Output Shaft Signal Not To Specification CHECK THE FOLLOWING Check the gearbox specifications and ensure that the ratio of the engine speed against output shaft speed while in 1st gear is correct (drive vehicle on rolling road or road test). At constant road speed with no gear changes both Textbook/T4 readings should be stable. The two readings should also maintain the same ratio so long as no gear changes take place. If the output shaft signal is unstable there may be a problem with the output shaft sensor circuit. If the engine speed signal is unstable there may be a problem with the ECM or its sensors. If the gear ratio is not to specification there may be a problem with the gearbox. If Textbook/T4 not available, use Live Data reading function on Scan Tool (See Scan Tool manufacturers handbook for detailed instruction). POSSIBLE FAULTS Output shaft sensor fault. ECM or ECM sensors fault. Gearbox mechanical fault.
  2. Engine Management ECM Faults Present CHECK THE FOLLOWING Read ECM fault codes and check if any crankshaft sensor, engine speed, engine load/airflow or engine torque measurement faults are set. Any faults present should be rectified. POSSIBLE FAULTS Faults set in ECM.
  3. Open Circuit C243/E (K) To C193/42 (R) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  4. Open Circuit C243/F (B) To C193/14 (B) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Shaft Speed Electrical Interference OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  6. Connectors C243, EAT C193 OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit Shaft Speed Sensor C193/14 (B) To C193/42 (R) CHECK THE FOLLOWING With the engine running and the position switch in "P" the shaft speed should measure 0 RPM. If the reading is not 0 RPM then there may be a problem with electrical interference. Check the connections to the screen around the output shaft sensor wiring. POSSIBLE FAULTS Faulty output shaft sensor wiring. Faulty output shaft sensor.
  8. Shaft Speed Sensor Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings do not maintain a fixed ratio the output shaft sensor may be faulty. POSSIBLE FAULTS Faulty output shaft sensor.
  9. Torque Converter Mechanical Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings maintain a fixed ratio the torque converter may be faulty. POSSIBLE FAULTS Transmission torque converter mechanical fault.
  10. Gearbox Mechanical Fault CHECK THE FOLLOWING Ensure none of the electrical faults described in this section of the diagnostic are present. Road test the vehicle. Ensure all gears are engaged during testing. If the gearbox and vehicle behave abnormally there may be a mechanical problem with the gearbox. POSSIBLE FAULTS Gearbox mechanical fault.
  1. DTC P0732 Gear Ratio Monitoring (2nd Gear)
  1. Output shaft signal not to specification. See 1 under CHECK.
  2. Engine management ECM faults present. See 2 under CHECK.
  3. Open circuit C243/E (K) to C193/42 (R). See 3 under CHECK.
  4. Open circuit C243/F (B) to C193/14 (B). See 4 under CHECK.
  5. Shaft speed electrical interference. See 5 under CHECK.
  6. Connectors C243, EAT C193. See 6 under CHECK.
  7. Open circuit shaft speed sensor C193/14 (B) to C193/42 (R). See 7 under CHECK.
  8. Shaft speed sensor fault. See 8 under CHECK.
  9. Torque converter mechanical fault. See 9 under CHECK.
  10. Gearbox mechanical fault. See 10 under CHECK.
  1. Output Shaft Signal Not To Specification CHECK THE FOLLOWING Check the gearbox specifications and ensure that the ratio of the engine speed against output shaft speed while in 2nd gear is correct (drive vehicle on rolling road or road test). At constant road speed with no gear changes both Textbook/T4 readings should be stable. The two readings should also maintain the same ratio so long as no gear changes take place. If the output shaft signal is unstable there may be a problem with the output shaft sensor circuit. If the engine speed signal is unstable there may be a problem with the ECM or its sensors. If the gear ratio is not to specification there may be a problem with the gearbox. If Textbook/T4 not available, use Live Data reading function on Scan Tool. (See Scan Tool manufacturers handbook for detailed instruction). POSSIBLE FAULTS Output shaft sensor fault. ECM or ECM sensors fault. Gearbox mechanical fault.
  2. Engine Management ECM Faults Present CHECK THE FOLLOWING Read ECM fault codes and check if any crankshaft sensor, engine speed, engine load/airflow or engine torque measurement faults are set. Any faults present should be rectified. POSSIBLE FAULTS Faults set in ECM.
  3. Open Circuit C243/E (K) To C193/42 (R) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  4. Open Circuit C243/F (B) To C193/14 (B) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Shaft Speed Electrical Interference OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  6. Connectors C243, EAT C193 OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit Shaft Speed Sensor C193/14 (B) To C193/42 (R) CHECK THE FOLLOWING With the engine running and the position switch in "P" the shaft speed should measure 0 RPM. If the reading is not 0 RPM then there may be a problem with electrical interference. Check the connections to the screen around the output shaft sensor wiring. POSSIBLE FAULTS Faulty output shaft sensor wiring. Faulty output shaft sensor
  8. Shaft Speed Sensor Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings do not maintain a fixed ratio the output shaft sensor may be faulty. POSSIBLE FAULTS Faulty output shaft sensor
  9. Torque Converter Mechanical Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings maintain a fixed ratio the torque converter may be faulty. POSSIBLE FAULTS Transmission torque converter mechanical fault.
  10. Gearbox Mechanical Fault CHECK THE FOLLOWING Ensure none of the electrical faults described in this section of the diagnostic are present. Road test the vehicle. Ensure all gears are engaged during testing. If the gearbox and vehicle behave abnormally there may be a mechanical problem with the gearbox. POSSIBLE FAULTS Gearbox mechanical fault.
  1. DTC P0733 Gear Ratio Monitoring (3rd Gear)
  1. Output shaft signal not to specification. See 1 under CHECK.
  2. Engine management ECM faults present. See 2 under CHECK.
  3. Open circuit C243/E (K) to C193/42 (R). See 3 under CHECK.
  4. Open circuit C243/F (B) to C193/14 (B). See 4 under CHECK.
  5. Shaft speed electrical interference. See 5 under CHECK.
  6. Connectors C243, EAT C193. See 6 under CHECK.
  7. Open circuit shaft speed sensor C193/14 (B) to C193/42 (R). See 7 under CHECK.
  8. Shaft speed sensor fault. See 8 under CHECK.
  9. Torque converter mechanical fault. See 9 under CHECK.
  10. Gearbox mechanical fault. See 10 under CHECK.
  1. Output Shaft Signal Not To Specification CHECK THE FOLLOWING Check the gearbox specifications and ensure that the ratio of the engine speed against output shaft speed while in 3rd gear is correct (drive vehicle on rolling road or road test). At constant road speed with no gear changes both Textbook/T4 readings should be stable. The two readings should also maintain the same ratio so long as no gear changes take place. If the output shaft signal is unstable there may be a problem with the output shaft sensor circuit. If the engine speed signal is unstable there may be a problem with the ECM or its sensors. If the gear ratio is not to specification there may be a problem with the gearbox. If Textbook/T4 not available, use Live Data reading function on Scan Tool. (See Scan Tool manufacturers handbook for detailed instruction). POSSIBLE FAULTS Output shaft sensor fault. ECM or ECM sensors fault. Gearbox mechanical fault.
  2. Engine Management ECM Faults Present CHECK THE FOLLOWING Read ECM fault codes and check if any crankshaft sensor, engine speed, engine load/airflow or engine torque measurement faults are set. Any faults present should be rectified. POSSIBLE FAULTS Faults set in ECM.
  3. Open Circuit C243/E (K) To C193/42 (R) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  4. Open Circuit C243/F (B) To C193/14 (B) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Shaft Speed Electrical Interference OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  6. Connectors C243, EAT C193 OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit Shaft Speed Sensor C193/14 (B) To C193/42 (R) CHECK THE FOLLOWING With the engine running and the position switch in "P" the shaft speed should measure 0 RPM. If the reading is not 0 RPM then there may be a problem with electrical interference. Check the connections to the screen around the output shaft sensor wiring. POSSIBLE FAULTS Faulty output shaft sensor wiring. Faulty output shaft sensor.
  8. Shaft Speed Sensor Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings do not maintain a fixed ratio the output shaft sensor may be faulty. POSSIBLE FAULTS Faulty output shaft sensor.
  9. Torque Converter Mechanical Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings maintain a fixed ratio the torque converter may be faulty. POSSIBLE FAULTS Transmission torque converter mechanical fault.
  10. Gearbox Mechanical Fault CHECK THE FOLLOWING Ensure none of the electrical faults described in this section of the diagnostic are present. Road test the vehicle. Ensure all gears are engaged during testing. If the gearbox and vehicle behave abnormally there may be a mechanical problem with the gearbox. POSSIBLE FAULTS Gearbox mechanical fault.
  1. DTC P0734 Gear Ratio Monitoring (4th Gear)
  1. Output shaft signal not to specification. See 1 under CHECK.
  2. Engine management ECM faults present. See 2 under CHECK.
  3. Open circuit C243/E (K) to C193/42 (R). See 3 under CHECK.
  4. Open circuit C243/F (B) to C193/14 (B). See 4 under CHECK.
  5. Shaft speed electrical interference. See 5 under CHECK.
  6. Connectors C243, EAT C193. See 6 under CHECK.
  7. Open circuit shaft speed sensor C193/14 (B) to C193/42 (R). See 7 under CHECK.
  8. Shaft speed sensor fault. See 8 under CHECK.
  9. Torque converter mechanical fault. See 9 under CHECK.
  10. Gearbox mechanical fault. See 10 under CHECK.
  1. Output Shaft Signal Not To Specification CHECK THE FOLLOWING Check the gearbox specifications and ensure that the ratio of the engine speed against output shaft speed while in 4th gear is correct (drive vehicle on rolling road or road test). At constant road speed with no gear changes both Textbook/T4 readings should be stable. The two readings should also maintain the same ratio so long as no gear changes take place. If the output shaft signal is unstable there may be a problem with the output shaft sensor circuit. If the engine speed signal is unstable there may be a problem with the ECM or its sensors. If the gear ratio is not to specification there may be a problem with the gearbox. If Textbook/T4 not available, use Live Data reading function on Scan Tool (See Scan Tool manufacturers handbook for detailed instruction). POSSIBLE FAULTS Output shaft sensor fault. ECM or ECM sensors fault. Gearbox mechanical fault.
  2. Engine Management ECM Faults Present CHECK THE FOLLOWING Read ECM fault codes and check if any crankshaft sensor, engine speed, engine load/airflow or engine torque measurement faults are set. Any faults present should be rectified. POSSIBLE FAULTS Faults set in ECM.
  3. Open Circuit C243/E (K) To C193/42 (R) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  4. Open Circuit C243/F (B) To C193/14 (B) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Shaft Speed Electrical Interference OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  6. Connectors C243, EAT C193 OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Open Circuit Shaft Speed Sensor C193/14 (B) To C193/42 (R) CHECK THE FOLLOWING With the engine running and the position switch in "P" the shaft speed should measure 0 RPM. If the reading is not 0 RPM then there may be a problem with electrical interference. Check the connections to the screen around the output shaft sensor wiring. POSSIBLE FAULTS Faulty output shaft sensor wiring. Faulty output shaft sensor.
  8. Shaft Speed Sensor Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings do not maintain a fixed ratio the output shaft sensor may be faulty. POSSIBLE FAULTS Faulty output shaft sensor.
  9. Torque Converter Mechanical Fault CHECK THE FOLLOWING Monitor the road speed (from the vehicle speedometer) and the output shaft speed while driving on the road or on a rolling road. The two readings should maintain the same ratio. If one reading doubles so should the other reading. If the readings maintain a fixed ratio the torque converter may be faulty. POSSIBLE FAULTS Transmission torque converter mechanical fault.
  10. Gearbox Mechanical Fault CHECK THE FOLLOWING Ensure none of the electrical faults described in this section of the diagnostic are present. Road test the vehicle. Ensure all gears are engaged during testing. If the gearbox and vehicle behave abnormally there may be a mechanical problem with the gearbox. POSSIBLE FAULTS Gearbox mechanical fault.
  1. DTC P0741 Lock-Up Clutch Monitoring
  1. Gear ratio fault present. See 1 under CHECK.
  2. Engine Speed signal fault present (N_MOT invalid). See 2 under CHECK.
  3. Solenoid lock-up clutch S/C or O/C fault present. See 3 under CHECK.
  4. Transmission mechanical fault (torque converter). See 4 under CHECK.
  1. Gear Ratio Fault Present CHECK THE FOLLOWING Check if any gear ratio faults are present. Diagnose the gear ratio faults and re-test the vehicle. POSSIBLE FAULTS Gear ratio fault is present.
  2. Engine Speed Signal Fault Present (N_MOT Invalid) CHECK THE FOLLOWING Check if an engine speed fault is present. This is indicated by a CAN message (N_MOT invalid). Diagnose the fault and re-test the vehicle. POSSIBLE FAULTS Engine speed fault is present.
  3. Solenoid Lock-Up Clutch S/C Or O/C Fault Present CHECK THE FOLLOWING Check if a solenoid lock-up clutch S/C or O/C fault is present. Diagnose the fault and re-test the vehicle. POSSIBLE FAULTS Solenoid lock-up clutch S/C or O/C fault is present.
  4. Transmission Mechanical Fault (Torque Converter) CHECK THE FOLLOWING Carry out service procedure on the gearbox torque converter. POSSIBLE FAULTS Mechanical fault with transmission.
  1. DTC P0743 Solenoid Valve Lockup Clutch Monitoring (S/C To Ground Or O/C)
  1. Short circuit C193/32 (SO) to vehicle earth. See 1 under CHECK.
  2. Open circuit C193/32 (SO) to C193/53 (OLG). See 2 under CHECK.
  3. Short circuit C193/53 (OLG) to vehicle earth. See 3 under CHECK.
  4. Faulty EAT (gearbox) ECU. See 4 under CHECK.
  1. Short Circuit C193/32 (SO) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  2. Open Circuit C193/32 (SO) To C193/53 (OLG) CHECK THE FOLLOWING Open circuit, check resistance C193/32 (SO) to C193/53 (OLG). ACCEPTABLE RANGE More than 50 Ohms. DIAGNOSTIC HINTS If the reading is not within the acceptable range check for open circuit: C193/32 (SO) to C243/L (SO) or C193/53 (OLG) to C243/M (OLG).
  3. Short Circuit C193/53 (OLG) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  4. Faulty EAT (Gearbox) ECU CHECK THE FOLLOWING Ensure all of the checks for short to vehicle earth or open circuit have been carried out. If these problems are not present check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P0748 Pressure Regulator Check (S/C To 12 Volt)
  1. C193/53 (OLG) shorted to 12 volt. See 1 under CHECK.
  2. ECU fault. See 2 under CHECK.
  1. C193/53 (OLG) Shorted To +12 Volt CHECK THE FOLLOWING C193/53 (OLG) shorted to +12 volt. Disconnect EAT C193 before measuring voltage between C193/53 (OLG) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/53 (OLG) for short circuit to +12 volt.
  2. ECU Fault CHECK THE FOLLOWING Ensure that the check for short to +12 volt has been carried out. Check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P0748 Pressure Regulator Monitoring (S/C To Ground Or O/C)
  1. Short circuit C193/5 (G) to vehicle earth. See 1 under CHECK.
  2. Open circuit C193/5 (G) to C193/53 (OLG). See 2 under CHECK.
  3. Short circuit C193/53 (OLG) to vehicle earth. See 3 under CHECK.
  4. Faulty EAT (gearbox) ECU. See 4 under CHECK.
  1. Short Circuit C193/5 (G) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  2. Open Circuit C193/5 (G) To C193/53 (OLG) CHECK THE FOLLOWING Open circuit, check resistance C193/5 (G) to C193/53 (OLG). ACCEPTABLE RANGE More than 50 Ohms. DIAGNOSTIC HINTS If the reading is not within the acceptable range check for open circuit: C193/5 (G) to C243/B (G). Or C193/5 (G) to C243/M (OLG).
  3. Short Circuit C193/53 (OLG) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  4. Faulty EAT (Gearbox) ECU CHECK THE FOLLOWING Ensure all of the checks for short to vehicle earth or open circuit have been carried out. If these problems are not present check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P0753 Solenoid Valve 1 Check (S/C To +12 Volt)
  1. C193/30 (OP) shorted to +12 volt. See 1 under CHECK.
  2. ECU fault. See 2 under CHECK.
  1. C193/30 (OP) Shorted To +12 volt CHECK THE FOLLOWING C193/30 (OP) shorted to +12 volt. Disconnect EAT C193 before measuring voltage between C193/30 (OP) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/30 (OP) for short circuit to +12 volt.
  2. ECU Fault CHECK THE FOLLOWING Ensure that the check for short to +12 volt has been carried out. Check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P0753 Solenoid Valve 1 Monitoring (S/C To Ground Or O/C)
  1. Short circuit C193/30 (OP) to vehicle earth. See 1 under CHECK.
  2. Open circuit C193/30 (OP) to C193/53 (OLG). See 2 under CHECK.
  3. Short circuit C193/53 (OLG) to vehicle earth. See 3 under CHECK.
  4. Faulty EAT (gearbox) ECU. See 4 under CHECK.
  1. Short Circuit C193/30 (OP) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  2. Open Circuit C193/30 (OP) To C193/53 (OLG) CHECK THE FOLLOWING Open circuit, check resistance C193/30 (OP) to C193/53 (OLG). ACCEPTABLE RANGE More than 50 Ohms. DIAGNOSTIC HINTS If the reading is not within the acceptable range check for open circuit: C193/30 (OP) to C243/H (P) or C193/53 (OLG) to C243/M (OLG).
  3. Short Circuit C193/53 (OLG) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  4. Faulty EAT (Gearbox) ECU CHECK THE FOLLOWING Ensure all of the checks for short to vehicle earth or open circuit have been carried out. If these problems are not present check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P0758 Solenoid Valve 2 Check (S/C To +12 Volt)
  1. C193/33 (OW) shorted to +12 volt. See 1 under CHECK.
  2. ECU fault. See 2 under CHECK.
  1. C193/33 (OW) Shorted To +12 Volt CHECK THE FOLLOWING C193/33 (OW) Shorted To +12 Volt. Disconnect EAT C193 before measuring voltage between C193/33 (OW) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/33 (OW) for short circuit to +12 volt.
  2. ECU Fault CHECK THE FOLLOWING Ensure that the check for short to +12 volt has been carried out. Check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P0758 Solenoid Valve 2 Monitoring (S/C To Ground Or O/C)
  1. Short circuit C193/33 (OW) to vehicle earth. See 1 under CHECK.
  2. Open circuit C193/33 (OW) to C193/53 (OLG). See 2 under CHECK.
  3. Short circuit C193/53 (OLG) to vehicle earth. See 3 under CHECK.
  4. Faulty EAT (gearbox) ECU. See 4 under CHECK.
  1. Short Circuit C193/33 (OW) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  2. Open Circuit C193/33 (OW) To C193/53 (OLG) CHECK THE FOLLOWING Open circuit, check resistance C193/33 (OW) to C193/53 (OLG). ACCEPTABLE RANGE More than 50 Ohms. DIAGNOSTIC HINTS If the reading is not within the acceptable range check for open circuit: C193/33 (OW) to C243/K (W) or C193/53 (OLG) to C243/M (OLG).
  3. Short Circuit C193/53 (OLG) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  4. Faulty EAT (Gearbox) ECU CHECK THE FOLLOWING Ensure all of the checks for short to vehicle earth or open circuit have been carried out. If these problems are not present check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P1129 Upstream Oxygen Sensors Connected Incorrectly (Swapped) Drive Cycle C: Signal Implausible
  1. Upstream oxygen sensors incorrectly fitted. See 1 under CHECK.
  1. Upstream Oxygen Sensors Incorrectly Fitted CHECK THE FOLLOWING Upstream sensors are swapped over - bank A to bank B and bank B to bank A. POSSIBLE FAULTS Upstream oxygen sensors swapped.
  1. DTC P1170 Lambda Sensor Aging tv Bank 1 Drive Cycle C: Signal Out Of Range - Above Maximum
  2. DTC P1170 Lambda Sensor Aging tv Bank 1 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Deteriorated upstream oxygen sensor. See 1 under CHECK.
  2. Deteriorated downstream oxygen sensor. See 2 under CHECK.
  1. Deteriorated Upstream Oxygen Sensor POSSIBLE FAULTS The Motronic ECM has internally diagnosed that the switching characteristics of this oxygen sensor have degraded to a point where exhaust emissions will be increased. This fault is usually caused by the aging of the sensor in normal operation, however, this effect can be accelerated if the sensor has been contaminated with oil or other surface contamination.
  2. Deteriorated Downstream Oxygen Sensor POSSIBLE FAULTS The Motronic ECM has internally diagnosed that the characteristics of the upstream oxygen sensor have degraded to a point where exhaust emissions will be increased, however, this fault can sometimes be caused by the failure of the downstream sensor on the same bank causing an incorrect fault diagnosis. Also if both oxygen sensors (upstream and downstream) are flagged as faulty then the fault may in fact be only in the downstream sensor. The fault is normally caused by the aging of the sensor(s) in normal operation, however, the effect can be accelerated if the sensor has been contaminated with oil or other surface contamination.
  1. DTC P1173 Lambda Sensor Aging Tv Bank 2 Drive Cycle C: Signal Out Of Range - Above Maximum.
  2. DTC P1173 Lambda Sensor Aging Tv Bank 2 Drive Cycle C: Signal Out Of Range - Below Minimum
  1. Deteriorated upstream oxygen sensor. See 1 under CHECK.
  2. Deteriorated downstream oxygen sensor. See 2 under CHECK.
  1. Deteriorated Upstream Oxygen Sensor POSSIBLE FAULTS The Motronic ECM has internally diagnosed that the switching characteristics of this oxygen sensor have degraded to a point where exhaust emissions will be increased. This fault is normally caused by the aging of the sensor in normal operation, however, this effect can be accelerated if the sensor has been contaminated with oil or other surface contamination.
  2. Deteriorated Downstream Oxygen Sensor POSSIBLE FAULTS The Motronic ECM has internally diagnosed that the characteristics of the upstream oxygen sensor have degraded to a point where exhaust emissions will be increased, however, this fault can sometimes be caused by the failure of the downstream sensor on the same bank causing an incorrect fault diagnosis. Also if both oxygen sensors (upstream and downstream) are flagged as faulty then the fault may in fact be only in the downstream sensor. The fault is normally caused by the aging of the sensor(s) in normal operation, however, the effect can be accelerated if the sensor has been contaminated with oil or other surface contamination.
  1. DTC P1230 Fuel Pump Relay Fault Drive Cycle A: Signal Missing
  2. DTC P1231 Fuel Pump Relay Fault Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P1232 Fuel Pump Relay Fault Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Fuel pump relay faulty. See 1 under CHECK.
  2. Connector(s) C573, ECM C635 (B). See 2 under CHECK.
  3. Open circuit - C573/9 (UP) to C635/18 (UP). See 3 under CHECK.
  4. Fuel pump relay driver (in ECM) fault. See 4 under CHECK.
  1. Fuel Pump Relay Faulty CHECK THE FOLLOWING If available check fuel pump relay by substituting a known good unit. Use a multimeter to check the resistance of the relay coil. This should be between 40 and 150 Ohms. POSSIBLE FAULTS Faulty relay. DIAGNOSTIC HINTS Use a multimeter to manually check components.
  2. Connector(s) C573, ECM C635 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  3. Open Circuit - C573/9 (UP) To C635/18 (UP) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Fuel Pump Relay Driver (In ECM) Fault CHECK THE FOLLOWING Fuel pump relay never energized or fuel pump relay always energized (pump runs continuously). Short circuit, Open circuit and connector problems have been eliminated. POSSIBLE FAULTS Faulty ECM - Relay drive circuit not working. DIAGNOSTIC HINTS Use multimeter to manually check components.
  1. DTC P1300 Catalyst Damaging Misfire Multiple Cylinders Drive Cycle C: Signal Out Of Range - Above Maximum
  1. Fuel pressure too low. See 1 under CHECK.
  2. Crank synchronization problem. See 2 under CHECK.
  3. Ignition coil fault. See 3 under CHECK.
  4. Fuel contamination. See 4 under CHECK.
  5. Engine mechanical fault. See 5 under CHECK.
  1. Fuel Pressure Too Low CHECK THE FOLLOWING Fuelling adaptions show enrichment. Check fuel pressure with fuel pressure gauge. POSSIBLE FAULTS Fuel filter blocked. Fuel pressure regulator fault. Fuel pump fault.
  2. Crank Synchronization Problem CHECK THE FOLLOWING Sporadic reference mark error count raised. Reset count possibly also raised. Crank sensor fault is set. POSSIBLE FAULTS Crank sensor wheel physically damaged. Crank sensor out of position. Crank sensor faulty. DIAGNOSTIC HINTS Raised reset count with a zero reference error count may indicate a 12 volt supply problem. Diagnose fault with raised reference error count as a crank sensor fault.
  3. Ignition Coil Fault CHECK THE FOLLOWING Misfire counts high for all cylinders using coil 2 (1, 4, 6, 7). Misfire counts high for all cylinders using coil 1 (2, 3, 5, 8). Misfire counts high for all cylinders. POSSIBLE FAULTS Problem with 12 volt supply to coil pack 2 (cylinders 1, 4, 7, 6). Problem with 12 volt supply to coil pack 1 (cylinders 2, 3, 5, 8). Problem with 12 volt supply to both coil packs. Coil pack 2 faulty. DIAGNOSTIC HINTS Raised misfire counts on paired cylinders 4+7, 2+3, 1+6, 5+8 indicate a problem with one coil drive or secondary circuit. Raised misfire counts on groups of four cylinders 1+4+6+7 or 2+3+5+8 indicate coil pack problems. Raised counts on groups of four cylinders 1+3+5+7 or 2+4+6+8 indicate a bank fuelling problem.
  4. Fuel Contamination CHECK THE FOLLOWING Misfire counts equally high for all cylinders. Fuel pressure measured with fuel pressure gauge reads normal. Abnormal fuelling adaptions. Engine running very rough. Visual check of fuel in fuel line (take sample). POSSIBLE FAULTS Fuel contaminated.
  5. Engine Mechanical Fault CHECK THE FOLLOWING Raised air flow at idle. Cylinder compressions. Cylinder leakages. Valve timing (Faulty or worn CAM). Spark plug condition - check for oil or carbon fouling. POSSIBLE FAULTS Valve, Piston or CAM problems causing low engine efficiency. Engine running rich causing carbon deposits on spark plugs.
  1. DTC P1319 Misfire With Low/Empty Fuel Drive Cycle C: Signal Out Of Range - Above Maximum
  1. Engine running with very low or empty fuel tank. See 1 under CHECK.
  2. Misfire occurred while fuel low but not empty. See 2 under CHECK.
  1. Engine Running With Very Low Or Empty Fuel Tank CHECK THE FOLLOWING The engine was running with a very low or empty fuel tank. INFORMATION This fault will be logged by the ECM if the engine misfires while the fuel level sensor shows that the fuel tank is low or empty. If the tank runs out of fuel while the misfire diagnostics are active a misfire fault flag will be set. In this case the misfire is caused by the lack of fuel in the tank and no corrective action needs to be taken apart from ensuring that the fuel tank is re-filled. DIAGNOSTIC HINTS Clear the fault flags after checking for any further non misfire of fuelling faults logged by the ECM.
  2. Misfire Occurred While Fuel Low But Not Empty CHECK THE FOLLOWING The fuel level was low but the fuel did not run out at any time. The fuel level sensor is functioning correctly. INFORMATION This fault will be logged by the ECM if the engine misfires while the fuel level sensor shows that the fuel tank is low or empty. If the fuel did not run out or low enough to cause the misfire then a misfire fault exists. Ensure the fuel tank is filled and that the fuel level sensor no longer indicates empty. Diagnose any misfire faults which are present.
  1. DTC P1412 Secondary Air System Fault Bank 1 Drive Cycle D: Signal Implausible
  2. DTC P1413 Secondary Air System Fault Bank 1 Drive Cycle D: Signal Out Of Range - Above Maximum
  3. DTC P1414 Secondary Air System Fault Bank 1 Drive Cycle D: Signal Out Of Range - Below Minimum
  1. Connector C0879, Connector C0636, Connector C0572. See 1 under CHECK.
  2. Connector C0641, Connector C0563. See 2 under CHECK.
  3. Fuse 37 (30 Amp). See 3 under CHECK.
  4. Secondary air pump. See 4 under CHECK.
  5. Secondary air valve. See 5 under CHECK.
  1. Connector C0879, Connector C0636, Connector C0572 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Connector C0641, Connector C0563 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  3. Fuse 37 (30 Amp) POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  4. Secondary Air Pump CHECK THE FOLLOWING Check the secondary air pump for any faults or damage. DIAGNOSTIC HINTS If Textbook/T4 available, it can be used to confirm any suspected faults. Run the secondary air system diagnostic, as this will tell you if the system is operating correctly.
  5. Secondary Air Valve CHECK THE FOLLOWING Check the secondary air valves for any faults or damage. DIAGNOSTIC HINTS If Textbook/T4 available, it can be used to confirm any suspected faults. Run the secondary air system diagnostic, as this will tell you if the system is operating correctly.
  1. DTC P1415 Secondary Air System Fault Bank 2 Drive Cycle D: Signal Implausible
  2. DTC P1416 Secondary Air System Fault Bank 2 Drive Cycle D: Signal Out Of Range - Above Maximum
  3. DTC P1417 Secondary Air System Fault Bank 2 Drive Cycle D: Signal Out Of Range - Below Minimum
  1. Connector C0879, Connector C0636, Connector C0572. See 1 under CHECK.
  2. Connector C0641, Connector C0563. See 2 under CHECK.
  3. Fuse 37 (30 Amp). See 3 under CHECK.
  4. Secondary air pump. See 4 under CHECK.
  5. Secondary air valve. See 5 under CHECK.
  1. Connector C0879, Connector C0636, Connector C0572 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Connector C0641, Connector C0563 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  3. Fuse 37 (30 Amp) POWER_DISTRIBUTION Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded. Certain diagnostics may also perform further checks to try and narrow down the fault. For example, check if other circuits fed by the same fuse are also experiencing problems.
  4. Secondary Air Pump CHECK THE FOLLOWING Check the secondary air pump for any faults or damage. NOTE: If Textbook/T4 available, it can be used to confirm any suspected faults. Run the secondary air system diagnostic, as this will tell you if the system is operating correctly.
  5. Secondary Air Valve CHECK THE FOLLOWING Check the secondary air valves for any faults or damage. NOTE: If Textbook/T4 available, it can be used to confirm any suspected faults. Run the secondary air system diagnostic, as this will tell you if the system is operating correctly.
  1. P1510 Idle Air Control Valve Fault (Opening) Drive Cycle A: Signal Missing
  2. P1513 Idle Air Control Valve Fault (Opening) Drive Cycle A: Signal Out Of Range - Below Minimum
  3. P1514 Idle Air Control Valve Fault (Opening) Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Short circuit C641/3 (US) to vehicle +12 volt. See 1 under CHECK.
  2. Short circuit C641/3 (US) to vehicle earth. See 2 under CHECK.
  3. Open circuit C641/3 (US) to C636/42 (US). See 3 under CHECK.
  4. Connector(s) C641, ECM C636 (B). See 4 under CHECK.
  5. Voltage incorrect C641/2 (NK) to vehicle earth. See 5 under CHECK.
  6. Faulty IACV (opening coil). See 6 under CHECK.
  7. Faulty ECM. See 7 under CHECK.
  1. Short Circuit C641/3 (US) To Vehicle +12 Volt SHORT_CIRCUIT Check resistance greater than 5 ohms.
  2. Short Circuit C641/3 (US) To Vehicle Earth OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C641/3 (US) To C636/42 (US) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Connector(s) C641, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  5. Voltage Incorrect C641/2 (NK) To Vehicle Earth CHECK THE FOLLOWING Voltage incorrect C641/2 (NK) to vehicle earth. ACCEPTABLE RESULTS Between 11.5-15.0V. DIAGNOSTIC HINTS If the voltage is not present check F2 Engine Compartment Fusebox and open circuit C641/2 (NK) to C570/1 (NK).
  6. Faulty IACV (Opening Coil) CHECK THE FOLLOWING Disconnect C641. Use a multimeter to check the resistance of the IACV opening coil - C641/2 (NK) to C641/3 (US). Acceptable range 10 to 100 Ohms. Check IACV by substituting a known good unit. POSSIBLE FAULTS IACV faulty.
  7. Faulty ECM CHECK THE FOLLOWING Eliminate all other fault possibilities before suspecting the ECM. Failure of this component is unlikely. Check ECM by substituting a known good unit. POSSIBLE FAULTS ECM Faulty.
  1. DTC P1535 A/C Compressor Request Plausibility Fault Drive Cycle A: Signal Implausible
  1. Connectors C793, ECM C637 (B). See 1 under CHECK.
  2. Open circuit - C637/38 (PW) to C793/12 (PB). See 2 under CHECK.
  3. Short circuit C637/38 (PW) to vehicle earth. See 3 under CHECK.
  1. Connectors C793, ECM C637 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit - C637/38 (PW) To C793/12 (PB) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Short Circuit C637/38 (PW) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  1. DTC P1551 Idle Air Control Valve Fault (Closing) Drive Cycle A: Signal Missing
  2. DTC P1552 Idle Air Control Valve Fault (Closing) Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P1553 Idle Air Control Valve Fault (Closing) Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Short circuit C641/1 (RG) to vehicle +12 volt. See 1 under CHECK.
  2. Short circuit C641/1 (RG) to vehicle earth. See 2 under CHECK.
  3. Open circuit C641/1 (RG) to C636/43 (RG). See 3 under CHECK.
  4. Connector(s) C641, ECM C636 (B). See 4 under CHECK.
  5. Voltage incorrect C641/2 (NK) to vehicle earth. See 5 under CHECK.
  6. Faulty IACV (closing coil). See 6 under CHECK.
  7. Faulty ECM. See 7 under CHECK.
  1. Short Circuit C641/1 (RG) To Vehicle +12 Volt SHORT_CIRCUIT Check resistance greater than 5 ohms.
  2. Short Circuit C641/1 (RG) To Vehicle Earth OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C641/1 (RG) To C636/43 (RG) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Connector(s) C641, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  5. Voltage Incorrect C641/2 (NK) To Vehicle Earth CHECK THE FOLLOWING Voltage incorrect C641/2 (NK) to vehicle earth. ACCEPTABLE RESULTS Between 11.5-15.0V. DIAGNOSTIC HINTS If the voltage is not present check F2 Engine Compartment Fusebox and open circuit C641/2 (NK) to C570/1 (NK).
  6. Faulty IACV (Closing Coil) CHECK THE FOLLOWING Disconnect C641. Use a multimeter to check the resistance of the IACV closing coil - C641/2 (NK) to C641/1 (RG). Acceptable range 10 Ohms to 100 Ohms. Check IACV by substituting a known good unit. POSSIBLE FAULTS IACV Faulty.
  7. Faulty ECM CHECK THE FOLLOWING Eliminate all other fault possibilities before suspecting the ECM. Failure of this component is unlikely. Check ECM by substituting a known good unit. POSSIBLE FAULTS ECM Faulty.
  1. DTC P1562 Battery Supply Check
  1. Alternator fault. See 1 under CHECK.
  2. Connector EAT C193. See 2 under CHECK.
  3. Intermittent 12 volt supply fault C193/54 (LGO) to vehicle earth. See 3 under CHECK.
  1. Alternator Fault CHECK THE FOLLOWING Ensure ignition ON (position 2) Ensure engine is running. Measure the voltage across the battery terminals. ACCEPTABLE RANGE 10.5V to 15.0V. POSSIBLE FAULTS Alternator problem.
  2. Connector EAT C193 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins
  3. Intermittent 12 volt Supply Fault C193/54 (LGO) To Vehicle Earth CHECK THE FOLLOWING Ensure ignition ON (position 2) Ensure engine is stopped. Measure the voltage between C193/54 (LGO) and C193/28 (B). Move the connectors while making the measurement and ensure that the reading does not change. Also touch F12 Engine Compartment Fusebox to check for intermittent connections. POSSIBLE FAULTS Poor connection or intermittent harness fault (ECU power).
  1. DTC P1590 Rough Road Signal Implausible Drive Cycle A: Signal Implausible
  2. DTC P1591 Rough Road Signal Implausible Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P1592 Rough Road Signal Implausible Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Connectors C504, ECM C637 (B). See 1 under CHECK.
  2. Open circuit - C637/34 (RG) to C504/4 (RG). See 2 under CHECK.
  3. ABS fault. See 3 under CHECK.
  1. Connectors C504, ECM C637 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit - C637/34 (RG) To C504/4 (RG) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. ABS Fault CHECK THE FOLLOWING Carry out diagnostic checks on the ABS system. POSSIBLE FAULTS Faulty ABS ECU or wiring.
  1. DTC P1601 EEPROM Fault (Checksum Fault)
  1. ECU fault. See 1 under CHECK.
  1. ECU Fault CHECK THE FOLLOWING Check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P1602 CAN Message N_MOT invalid (FFFFh)
  1. Engine speed measurement fault present in engine management ECM. See 1 under CHECK.
  1. Engine Speed Measurement Fault Present In Engine Management ECM CHECK THE FOLLOWING Read ECM fault codes and diagnose any faults likely to cause problems with engine speed measurement (e.g. Crankshaft sensor, reference position). POSSIBLE FAULTS Fault codes set in engine management ECM.
  1. DTC P1606 EEPROM Fault (Communication Fault)
  1. ECU fault. See 1 under CHECK.
  1. ECU Fault CHECK THE FOLLOWING Check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P1606 Watch Dog Check
  1. ECU fault. See 1 under CHECK.
  1. ECU Fault CHECK THE FOLLOWING Check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU (watch dog check).
  1. DTC P1612 Highside Switch Control Cannot Switch On Or Has S/C To Vehicle Ground
  1. C193/53 (OLG) shorted to C193/28 (B). See 1 under CHECK.
  2. C193/53 (OLG) shorted to vehicle earth. See 2 under CHECK.
  3. C193/30 (OP) shorted to C193/28 (B). See 3 under CHECK.
  4. C193/30 (OP) shorted to vehicle earth. See 4 under CHECK.
  5. C193/33 (OW) shorted to C193/28 (B). See 5 under CHECK.
  6. C193/33 (OW) shorted to vehicle earth. See 6 under CHECK.
  7. C193/32 (SO) shorted to C193/28 (B). See 7 under CHECK.
  8. C193/32 (SO) shorted to vehicle earth. See 8 under CHECK.
  9. ECU fault. See 9 under CHECK.
  1. C193/53 (OLG) Shorted To C193/28 (B) SHORT_CIRCUIT Check resistance greater than 5 ohms.
  2. C193/53 (OLG) Shorted To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  3. C193/30 (OP) Shorted To C193/28 (B) SHORT_CIRCUIT Check resistance greater than 5 ohms.
  4. C193/30 (OP) Shorted To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  5. C193/33 (OW) Shorted To C193/28 (B) SHORT_CIRCUIT Check resistance greater than 5 ohms.
  6. C193/33 (OW) Shorted To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  7. C193/32 (SO) Shorted To C193/28 (B) SHORT_CIRCUIT Check resistance greater than 5 ohms.
  8. C193/32 (SO) Shorted To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  9. ECU Fault CHECK THE FOLLOWING Ensure all of the checks for short to vehicle earth have been carried out. If these problems are not present check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. DTC P1613 Highside Switch Control Cannot Switch Off Or Has S/C to +12 Volt
  1. C193/53 (OLG) shorted to +12 volt. See 1 under CHECK.
  2. C193/30 (OP) shorted to +12 volt. See 2 under CHECK.
  3. C193/33 (OW) shorted to +12 volt. See 3 under CHECK.
  4. C193/32 (SO) shorted to +12 volt. See 4 under CHECK.
  5. ECU fault. See 5 under CHECK.
  1. C193/53 (OLG) Shorted To +12 volt CHECK THE FOLLOWING C193/53 (OLG) Shorted To +12 Volt Disconnect EAT C193 before measuring voltage between C193/53 (OLG) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/53 (OLG) for short circuit to +12 volt.
  2. C193/30 (OP) Shorted To +12 volt CHECK THE FOLLOWING C193/30 (OP) Shorted To +12 Volt Disconnect EAT C193 before measuring voltage between C193/30 (OP) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/30 (OP) for short circuit to +12 volt.
  3. C193/33 (OW) Shorted To +12 Volt CHECK THE FOLLOWING C193/33 (OW) shorted to +12 volt Disconnect EAT C193 before measuring voltage between C193/33 (OW) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/33 (OW) for short circuit to +12 volt.
  4. C193/32 (SO) Shorted To +12 volt CHECK THE FOLLOWING C193/32 (SO) shorted to +12 volt. Disconnect EAT C193 before measuring voltage between C193/32 (SO) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/32 (SO) for short circuit to +12 volt.
  5. ECU Fault CHECK THE FOLLOWING Ensure all of the checks for short to +12 volt have been carried out. If these problems are not present check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  1. P1663 Throttle Angle/Torque Signal (Power Stage) Drive Cycle A: Signal Missing
  2. P1664 Throttle Angle/Torque Signal (Power Stage) Drive Cycle A: Signal Out Of Range - Below Minimum
  3. P1665 Throttle Angle/Torque Signal (Power Stage) Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Short circuit C636/29 (SP) to vehicle +12 volt. See 1 under CHECK.
  2. Short circuit C636/29 (SP) to vehicle earth. See 2 under CHECK.
  3. Open circuit C504/10 (SP) to C636/29 (SP). See 3 under CHECK.
  4. Connector(s) C504, ECM C636 (B). See 4 under CHECK.
  5. Faulty ABS ECU. See 5 under CHECK.
  6. Faulty ECM. See 6 under CHECK.
  1. Short Circuit C636/29 (SP) To Vehicle +12 volt SHORT_CIRCUIT Check resistance greater than 5 ohms.
  2. Short Circuit C636/29 (SP) To Vehicle Earth OPEN_CIRCUIT Check resistance less than 1 M/ohmohm.
  3. Open Circuit C504/10 (SP) To C636/29 (SP) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Connector(s) C504, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  5. Faulty ABS ECU CHECK THE FOLLOWING Eliminate any possible harness or connector faults. Check ABS ECU by substituting a known good unit. POSSIBLE FAULTS ABS ECU Faulty
  6. Faulty ECM CHECK THE FOLLOWING Eliminate all other fault possibilities before suspecting the ECM. Failure of this component is unlikely. Check ECM by substituting a known good unit. POSSIBLE FAULTS ECM Faulty.
  1. DTC P1666 Anti-Theft Alarm Serial Link Fault Drive Cycle A: Signal Implausible.
  2. DTC P1667 Anti-Theft Alarm Serial Link Fault Drive Cycle A: Signal Out Of Range - Below Minimum.
  3. DTC P1668 Anti-Theft Alarm Serial Link Fault Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Open circuit - C637/33 (LGS) to C661/10 (LGS). See 1 under CHECK.
  2. Connectors C661, ECM C637 (B). See 2 under CHECK.
  3. Alarm ECU Faulty. See 3 under CHECK.
  4. Alarm ECU not fitted. See 4 under CHECK.
  1. Open circuit - C637/33 (LGS) To C661/10 (LGS) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Connectors C661, ECM C637 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  3. Alarm ECU Faulty CHECK THE FOLLOWING Carry out BCU diagnostics. POSSIBLE FAULTS Problem with alarm ECU (BCU).
  4. Alarm ECU Not Fitted CHECK THE FOLLOWING Verify that the vehicle is intended to have an alarm. If so check that market programming options are correct and that the correct ECUs are present. If the vehicle is not intended to have robust security re-program the Motronic ECM for non-robust security. POSSIBLE FAULTS Problem with vehicle configuration. Problem with ECM security set-up.
  1. DTC P1672 Immobilizer - Incorrect Code Drive Cycle A: Signal Implausible
  2. DTC P1673 Immobilizer - Incorrect Code Drive Cycle A: Signal Out Of Range - Below Minimum
  3. DTC P1674 Immobilizer - Incorrect Code Drive Cycle A: Signal Out Of Range - Above Maximum
  1. Motronic ECM not programmed with the correct code. See 1 under CHECK.
  1. Motronic ECM Not Programmed With The Correct Code CHECK THE FOLLOWING BCU or Motronic ECM has been replaced. POSSIBLE FAULTS BCU has been renewed. Motronic ECM has been renewed. BCU has been put into diagnostic mode for testing. DIAGNOSTIC HINTS If Textbook/T4 available, run security test on SUB-SYSTEM TEST menu.
  1. DTC P1700 Low Range Signal Implausible Drive Cycle C: Signal Implausible
  1. Connectors C685, ECM C636 (B). See 1 under CHECK.
  2. Open circuit - C636/18 (x) to C685/1 (RK). See 2 under CHECK.
  3. Short circuit C685/1 (RK) to vehicle earth. See 3 under CHECK.
  1. Connectors C685, ECM C636 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Open Circuit - C636/18 (x) To C685/1 (RK) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Short Circuit C685/1 (RK) To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  1. DTC P1705 High/Low Range Sensing
  1. Range switch not operating. See 1 under CHECK.
  2. Open circuit C685/2 (B) to vehicle earth. See 2 under CHECK.
  3. Open circuit C685/1 (RK) to C193/13 (RK). See 3 under CHECK.
  4. Connectors EAT C193, C685. See 4 under CHECK.
  5. Range switch faulty. See 5 under CHECK.
  1. Range Switch Not Operating CHECK THE FOLLOWING Move the range switch between high and low range and check if the display changes correctly. POSSIBLE FAULTS Range switch not operating correctly. Range switch circuit fault.
  2. Open Circuit C685/2 (B) To Vehicle Earth OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Open Circuit C685/1 (RK) To C193/13 (RK) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Connectors EAT C193, C685 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  5. Range Switch Faulty CHECK THE FOLLOWING Check the range switch is correctly set so that it closes when in the low range position. Check that the switch has a low resistance in low range and a high resistance in the high range position. The switch should be tested using a multimeter or suitable test equipment. POSSIBLE FAULTS Range switch incorrectly set. Range switch fault.
  1. DTC P1776 Transmission Torque Signal Problem Drive Cycle B: Signal Implausible
  1. Open circuit - C637/36 (W) to C193/16 (W). See 1 under CHECK.
  2. Open circuit - C637/37 (Y) to C193/44 (Y). See 2 under CHECK.
  3. Gearbox ECU problem. See 3 under CHECK.
  4. Motronic ECM problem. See 4 under CHECK.
  5. Connectors C193, ECM C637 (B). See 5 under CHECK.
  1. Open Circuit - C637/36 (W) To C193/16 (W) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  2. Open Circuit - C637/37 (Y) To C193/44 (Y) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  3. Gearbox ECU Problem CHECK THE FOLLOWING Possible incompatible Gearbox ECU and Motronic ECM. Check correct units fitted and correct tune selected where applicable. Possible faulty gearbox ECU - run gearbox diagnostics if Textbook/T4 available. POSSIBLE FAULTS Gearbox and ECM incompatible. Gearbox ECU fault.
  4. Motronic ECM Problem CHECK THE FOLLOWING Possible incompatible Gearbox ECU and Motronic ECM. Check correct units fitted and correct tune selected where applicable. Possible faulty Motronic ECM. Try substituting a known good unit if no other faults diagnosed. POSSIBLE FAULTS Gearbox ECU and Motronic ECM incompatible. Motronic ECM fault.
  5. Connectors C193, ECM C637 (B) CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  1. DTC P1810 MES1 Open Circuit Or Short Circuit To 12 Volt Or Ground
  1. C193/25 (YR) shorted to +12 volt. See 1 under CHECK.
  2. C193/25 (YR) shorted to vehicle earth. See 2 under CHECK.
  1. C193/25 (YR) Shorted To +12 volt CHECK THE FOLLOWING C193/25 (YR) shorted to +12 volt. Disconnect EAT C193 before measuring voltage between C193/25 (YR) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/25 (YR) for short circuit to +12 volt.
  2. C193/25 (YR) Shorted To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  1. DTC P1810 MES2 Open Circuit Or Short Circuit To 12 Volt Or Ground
  1. C193/51 (YG) shorted to +12 volt. See 1 under CHECK.
  2. C193/51 (YG) shorted to vehicle earth. See 2 under CHECK.
  1. C193/51 (YG) Shorted To +12 volt CHECK THE FOLLOWING C193/51 (YG) shorted to +12 volt. Disconnect EAT C193 before measuring voltage between C193/51 (YG) and vehicle earth. ACCEPTABLE RESULTS Between 0.0-4.0V. DIAGNOSTIC HINTS If the voltage is above the acceptable range check the harness connected to C193/51 (YG) for short circuit to +12 volt.
  2. C193/51 (YG) Shorted To Vehicle Earth SHORT_CIRCUIT Check resistance greater than 5 ohms.
  1. DTC P1841 CAN Bus Monitoring
  1. Petrol Only - Connector(s) EAT C193, C637. See 1 under CHECK.
  2. Diesel Only - Connector(s) EAT C193, C158. See 2 under CHECK.
  3. Petrol Only - Open circuit C193/16 (W) to C637/36 (W). See 3 under CHECK.
  4. Diesel Only - Open circuit C193/16 (W) to C158/35 (W). See 4 under CHECK.
  5. Petrol Only - Open circuit C193/44 (Y) to C637/37 (Y). See 5 under CHECK.
  6. Diesel Only - Open circuit C193/44 (Y) to C158/32 (Y). See 6 under CHECK.
  7. Faulty transmission ECU. See 7 under CHECK.
  8. Faulty engine management ECM. See 8 under CHECK.
  1. Petrol Only - Connector(s) EAT C193, C637 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Diesel Only - Connector(s) EAT C193, C158 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  3. Petrol Only - Open Circuit C193/16 (W) To C637/36 (W) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Diesel Only - Open Circuit C193/16 (W) To C158/35 (W) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Petrol Only - Open Circuit C193/44 (Y) To C637/37 (Y) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  6. Diesel Only - Open Circuit C193/44 (Y) To C158/32 (Y) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Faulty Transmission ECU CHECK THE FOLLOWING Ensure that the open circuit checks have been carried out. Check transmission ECU by substitution with a known good unit. POSSIBLE FAULTS Faulty transmission ECU.
  8. Faulty Engine Management ECM CHECK THE FOLLOWING Ensure that the open circuit checks have been carried out. If Textbook/T4 available, carry out diagnostic checks on ECM. Check ECM by substituting a known good unit. POSSIBLE FAULTS Faulty ECM.
  1. DTC P1842 CAN Level Monitoring
  1. Incorrect Gearbox ECU fitted. See 1 under CHECK.
  2. Incorrect engine management ECM fitted. See 2 under CHECK.
  1. Incorrect Gearbox ECU Fitted CHECK THE FOLLOWING Check part number of fitted ECU. Run engine management ECM diagnostic to check for CAN faults on ECM POSSIBLE FAULTS Incorrect ECU fitted.
  2. Incorrect Engine Management ECM Fitted CHECK THE FOLLOWING Check part number of fitted ECM. Run engine management ECM diagnostic to check for CAN faults on ECM POSSIBLE FAULTS Incorrect ECM fitted.
  1. DTC P1843 CAN Timeout Monitoring
  1. Petrol Only - Connector(s) EAT C193, C637. See 1 under CHECK.
  2. Diesel Only - Connector(s) EAT C193, C158. See 2 under CHECK.
  3. Petrol Only - Open circuit C193/16 (W) to C637/36 (W). See 3 under CHECK.
  4. Diesel Only - Open circuit C193/16 (W) to C158/35 (W). See 4 under CHECK.
  5. Petrol Only - Open circuit C193/44 (Y) to C637/37 (Y). See 5 under CHECK.
  6. Diesel Only - Open circuit C193/44 (Y) to C158/32 (Y). See 6 under CHECK.
  7. Engine management ECM was disconnected with ignition on or reprogrammed. See 7 under CHECK.
  8. Battery discharged or alternator fault. See 8 under CHECK.
  1. Petrol Only - Connector(s) EAT C193, C637 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  2. Diesel Only - Connector(s) EAT C193, C158 CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins.
  3. Petrol Only - Open Circuit C193/16 (W) To C637/36 (W) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  4. Diesel Only - Open Circuit C193/16 (W) To C158/35 (W) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  5. Petrol Only - Open Circuit C193/44 (Y) To C637/37 (Y) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  6. Diesel Only - Open Circuit C193/44 (Y) To C158/32 (Y) OPEN_CIRCUIT Check resistance less than 1 M/ohm.
  7. Engine Management ECM Was Disconnected With Ignition On Or Reprogrammed CHECK THE FOLLOWING If Textbook/T4 available, run ECM diagnostic. If ECM has not logged a CAN fault then suspect ECM disconnection or reprogramming. Clear fault code in transmission and monitor for re-occurrence. POSSIBLE FAULTS ECM disconnected with ignition switched on. ECM was reprogrammed (ECM CAN stops during programming).
  8. Battery Discharged Or Alternator Fault CHECK THE FOLLOWING Examine the battery voltage logged in the fault freeze frame. If the logged voltage was less than approximately 10 Volts there may be a problem with the battery or alternator. POSSIBLE FAULTS Discharged battery or faulty alternator.
  1. DTC P1884 CAN Message T_ANS Invalid (FFh)
  1. Air intake temperature measurement fault present in engine management ECM. See 1 under CHECK.
  1. Air Intake Temperature Measurement Fault Present In Engine Management ECM. CHECK THE FOLLOWING Read ECM fault codes and diagnose any faults likely to cause problems with air intake temperature measurement. POSSIBLE FAULTS Fault codes set in engine management ECM.
  1. DTC P1884 CAN Message PHOEHE Invalid (FFh)
  1. Fault present in engine management ECM. See 1 under CHECK.
  1. Fault Present In Engine Management ECM CHECK THE FOLLOWING Read ECM fault codes and diagnose any faults present. POSSIBLE FAULTS Fault codes set in engine management ECM.
  1. DTC P1884 CAN Message T_MOT (engine Temp) Invalid (FFh)
  1. Engine coolant temperature fault present in engine management ECM. See under CHECK.
  1. Engine Coolant Temperature Fault Present In Engine Management ECM CHECK THE FOLLOWING Read ECM fault codes and diagnose any temperature measurement faults. POSSIBLE FAULTS Fault codes set in engine management ECM.
  1. DTC P1884 CAN Message MD_REIB Invalid (FFh)
  1. Torque measurement fault present in engine management ECM. See 1 under CHECK.
  1. Torque Measurement Fault Present In Engine Management ECM CHECK THE FOLLOWING Read ECM fault codes and diagnose any torque related faults. POSSIBLE FAULTS Fault codes set in engine management ECM.
  1. DTC P1884 CAN Message N_MOT Invalid (Flag F_N_MOT)
  1. Engine speed measurement fault present in engine management ECM. See 1 under CHECK.
  1. Engine Speed Measurement Fault Present In Engine Management ECM CHECK THE FOLLOWING Read ECM fault codes and diagnose any faults likely to cause problems with engine speed measurement (e.g. Crankshaft sensor, reference position). POSSIBLE FAULTS Fault codes set in engine management ECM.
  1. DTC P1884 CAN Message V3 (Road Speed) Invalid (FFh)
  1. Road speed measurement fault present in engine management ECM. See 1 under CHECK.
  1. Road Speed Measurement Fault Present In Engine Management ECM CHECK THE FOLLOWING Read ECM fault codes and diagnose any road speed measurement faults. POSSIBLE FAULTS Fault codes set in engine management ECM.
  1. DTC P1884 CAN Message WFPDK (DKI) Invalid (FFh)
  1. Throttle position measurement fault present in engine management ECM. See 1 under CHECK.
  1. Throttle Position Measurement Fault Present In Engine Management ECM CHECK THE FOLLOWING Read ECM fault codes and diagnose any throttle faults. POSSIBLE FAULTS Fault codes set in engine management ECM.
  1. DTC P1884 CAN Message MD_IND Invalid (Flag F_TL_MES)
  1. Torque measurement fault present in engine management ECM. See 1 under CHECK.
  1. Torque Measurement Fault Present In Engine Management ECM CHECK THE FOLLOWING Read ECM fault codes and diagnose any faults likely to cause problems with torque measurement (e.g. Airflow, Load, Engine speed, temperature). POSSIBLE FAULTS Fault codes set in engine management ECM.
  1. DTC P1884 CAN Message MD_IND Invalid (FFh)
  1. Torque measurement fault present in engine management ECM. See 1 under CHECK.
  1. Torque Measurement Fault Present In Engine Management ECM CHECK THE FOLLOWING Read ECM fault codes and diagnose any faults likely to cause problems with torque measurement (e.g. Airflow, Load, Engine speed, temperature). POSSIBLE FAULTS Fault codes set in engine management ECM.

See also:
• DTC P0101

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