Contents Wiring diagrams Section: Testing & Diagnostics All sections

Fuel and Emissions Systems: Diagnosis Honda Pilot II

Testing & Diagnostics 2 illustrations ~572 words

If You Can't Duplicate the DTC

Some of the troubleshooting requires you to reset the PCM and try to duplicate the DTC. If the problem is intermittent and you can't duplicate the code, do not continue through the procedure. To do so will only result in confusion and possibly, a needlessly replaced PCM.

Scan Tool Clear Command

If you are using a generic scan tool to clear commands, be aware that there is only one setting for clearing the PCM, and it clears all commands at the same time (CKP pattern learn, idle learn, readiness codes, freeze data, on-board snapshot, and DTCs). After you clear all commands, you then need to do these procedures, in this order: PCM IDLE LEARN PROCEDURE ; CKP pattern learn procedure; test-drive to set readiness codes to complete (see HOW TO SET READINESS CODES ).

DTC Clear

  1. Clear the DTC with the HDS while the engine is stopped.
  2. Turn the ignition switch to LOCK (0).
  3. Turn the ignition switch to ON (II), and wait 30 seconds.
  4. Turn the ignition switch to LOCK (0), and disconnect the HDS from the DLC.

How To End a Troubleshooting Session (Required After Any Troubleshooting)

  1. Reset the PCM with the HDS.
  2. Do «PCM IDLE LEARN PROCEDURE»(ref-333561-S36442749152009072100000) .
  3. Turn the ignition switch to LOCK (0).
  4. Disconnect the HDS from the DLC.

Note. The PCM is part of the immobilizer system. If you replace the PCM, you must use the HDS to instruct the new PCM and the immobilizer-keyless control unit to recognize each other's unique serial code. In order for the engine to start, you must rewrite the immobilizer code with the HDS.

How to Troubleshoot Circuits At the PCM Connectors

Note. The PCM overwrites data and monitors the EVAP system for up to 30 minutes after the ignition switch is turned to LOCK (0). Jumping the SCS line after turning the ignition switch to LOCK (0) cancels this function. Disconnecting the PCM during this function, without jumping the SCS line first, can damage the PCM.

  1. Jump the SCS line with the HDS.
  2. Remove the cover (D).
  3. Disconnect PCM connectors A, B, and C. NOTE: PCM connectors A, B, and C have symbols (A=[], B=delta, C=o) embossed on them for identification.
  4. When diagnosis/troubleshooting is done at the PCM connector, use the terminal test port (A) above the terminal you need to check.
  5. Connect one side of the patch cord (A) terminals to a commercially available digital multimeter (B), and connect the other side of the terminals (C) to a commercially available banana jack (Pomona Electronics Tool No. 3563 or equivalent) (D).
  6. Gently contact the pin probe (male) at the terminal test port from the terminal side. Do not force the tips into the terminals.

Note. For accurate results, always use the pin probe (male). To prevent damage to the connector terminals, do not insert test equipment probes, paper clips, or other substitutes as they can damage the terminals. Damaged terminals cause a poor connection and an incorrect measurement. Do not puncture the insulation on a wire. Punctures can cause poor or intermittent electrical connections.

DTC Troubleshooting Index

DTC (MIL indication (1) )Two Drive Cycle DetectionDetection ItemMILNote
P0101 (50)OMass Air Flow (MAF) Sensor Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P0101: MAF SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM )
P0102 (50)Mass Air Flow (MAF) Sensor Circuit Low VoltageONDTC Troubleshooting (see DTC P0102: MAF SENSOR CIRCUIT LOW VOLTAGE )
P0103 (50)Mass Air Flow (MAF) Sensor Circuit High VoltageONDTC Troubleshooting (see DTC P0103: MAF SENSOR CIRCUIT HIGH VOLTAGE )
P0107 (3)Manifold Absolute Pressure (MAP) Sensor Circuit Low VoltageONDTC Troubleshooting (see DTC P0107: MAP SENSOR CIRCUIT LOW VOLTAGE )
P0108 (3)Manifold Absolute Pressure (MAP) Sensor Circuit High VoltageONDTC Troubleshooting (see DTC P0108: MAP SENSOR CIRCUIT HIGH VOLTAGE )
P0111 (10)OIntake Air Temperature (IAT) Sensor Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P0111: IAT SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM )
P0112 (10)OIntake Air Temperature (IAT) Sensor Circuit Low VoltageONDTC Troubleshooting (see DTC P0112: IAT SENSOR CIRCUIT LOW VOLTAGE )
P0113 (10)OIntake Air Temperature (IAT) Sensor Circuit High VoltageONDTC Troubleshooting (see DTC P0113: IAT SENSOR CIRCUIT HIGH VOLTAGE )
P0116 (86)Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P0116: ECT SENSOR 1 RANGE/PERFORMANCE PROBLEM )
P0117 (6)Engine Coolant Temperature (ECT) Sensor 1 Circuit Low VoltageONDTC Troubleshooting (see DTC P0117: ECT SENSOR 1 CIRCUIT LOW VOLTAGE )
P0118 (6)Engine Coolant Temperature (ECT) Sensor 1 Circuit High VoltageONDTC Troubleshooting (see DTC P0118: ECT SENSOR 1 CIRCUIT HIGH VOLTAGE )
P0122 (7)Throttle Position (TP) Sensor A Circuit Low VoltageONDTC Troubleshooting (see DTC P0122: TP SENSOR A CIRCUIT LOW VOLTAGE )
P0123 (7)Throttle Position (TP) Sensor A Circuit High VoltageONDTC Troubleshooting (see DTC P0123: TP SENSOR A CIRCUIT HIGH VOLTAGE )
P0125 (86)OEngine Coolant Temperature (ECT) Sensor 1 Malfunction/Slow ResponseONDTC Troubleshooting (see DTC P0125: ECT SENSOR 1 MALFUNCTION/SLOW RESPONSE )
P0128 (87)OCooling System MalfunctionONDTC Troubleshooting (see DTC P0128: COOLING SYSTEM MALFUNCTION )
P0133 (157)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Malfunction/Slow ResponseONDTC Troubleshooting (see DTC P0133: REAR A/F SENSOR (BANK 1, SENSOR 1) CIRCUIT SLOW RESPONSE )
P0134 (151)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Heater System MalfunctionONDTC Troubleshooting (see DTC P0134: REAR A/F SENSOR (BANK 1, SENSOR 1) HEATER SYSTEM MALFUNCTION )
P0135 (151)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Heater Circuit MalfunctionONDTC Troubleshooting (see DTC P0135: REAR A/F SENSOR (BANK 1, SENSOR 1) HEATER CIRCUIT MALFUNCTION )
P0137 (161)ORear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Circuit Low VoltageONDTC Troubleshooting (see DTC P0137: REAR SECONDARY HO2S (BANK 1, SENSOR 2) CIRCUIT LOW VOLTAGE )
P0138 (161)ORear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Circuit High VoltageONDTC Troubleshooting (see DTC P0138: REAR SECONDARY HO2S (BANK 1, SENSOR 2) CIRCUIT HIGH VOLTAGE )
P0139 (161)ORear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Slow ResponseONDTC Troubleshooting (see DTC P0139: REAR SECONDARY HO2S (BANK 1, SENSOR 2) SLOW RESPONSE )
P0141 (163)ORear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Heater Circuit MalfunctionONDTC Troubleshooting (see DTC P0141: REAR SECONDARY HO2S (BANK 1, SENSOR 2) HEATER CIRCUIT MALFUNCTION )
P0153 (158)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Malfunction/Slow ResponseONDTC Troubleshooting (see DTC P0153: FRONT A/F SENSOR (BANK 2, SENSOR 1) CIRCUIT SLOW RESPONSE )
P0154 (152)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Heater System MalfunctionONDTC Troubleshooting (see DTC P0154: FRONT A/F SENSOR (BANK 2, SENSOR 1) HEATER SYSTEM MALFUNCTION )
P0155 (152)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Heater Circuit MalfunctionONDTC Troubleshooting (see DTC P0155: FRONT A/F SENSOR (BANK 2, SENSOR 1) HEATER CIRCUIT MALFUNCTION )
P0157 (162)OFront Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Circuit Low VoltageONDTC Troubleshooting (see DTC P0157: FRONT SECONDARY HO2S (BANK 2, SENSOR 2) CIRCUIT LOW VOLTAGE )
P0158 (162)OFront Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Circuit High VoltageONDTC Troubleshooting (see DTC P0158: FRONT SECONDARY HO2S (BANK 2, SENSOR 2) CIRCUIT HIGH VOLTAGE )
P0159 (162)OFront Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Slow ResponseONDTC Troubleshooting (see DTC P0159: FRONT SECONDARY HO2S (BANK 2, SENSOR 2) SLOW RESPONSE )
P0161 (164)OFront Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Heater Circuit MalfunctionONDTC Troubleshooting (see DTC P0161: FRONT SECONDARY HO2S (BANK 2, SENSOR 2) HEATER CIRCUIT MALFUNCTION )
P0171 (153)ORear Bank (Bank 1) Fuel System Too LeanONDTC Troubleshooting (see DTC P0171: REAR BANK (BANK 1) FUEL SYSTEM TOO LEAN )
P0172 (153)ORear Bank (Bank 1) Fuel System Too RichONDTC Troubleshooting (see DTC P0172: REAR BANK (BANK 1) FUEL SYSTEM TOO RICH )
P0174 (154)OFront Bank (Bank 2) Fuel System Too LeanONDTC Troubleshooting (see DTC P0174: FRONT BANK (BANK 2) FUEL SYSTEM TOO LEAN )
P0175 (154)OFront Bank (Bank 2) Fuel System Too RichONDTC Troubleshooting (see DTC P0175: FRONT BANK (BANK 2) FUEL SYSTEM TOO RICH )
P0222 (07)Throttle Position (TP) Sensor B Circuit Low VoltageONDTC Troubleshooting (see DTC P0222: TP SENSOR B CIRCUIT LOW VOLTAGE )
P0223 (07)Throttle Position (TP) Sensor B Circuit High VoltageONDTC Troubleshooting (see DTC P0223: TP SENSOR B CIRCUIT HIGH VOLTAGE )
P0300 (77) and any combination of the following: P0301 (71) P0302 (72) P0303 (73) P0304 (74) P0305 (75) P0306 (76)ORandom Misfire DetectedONDTC Troubleshooting (see DTC P0300: RANDOM MISFIRE AND ANY COMBINATION OF THE FOLLOWING )
P0301 (71)ONo. 1 Cylinder Misfire DetectedONDTC Troubleshooting (see DTC P0301: NO. 1 CYLINDER MISFIRE DETECTED )
P0302 (72)ONo. 2 Cylinder Misfire DetectedONDTC Troubleshooting (see DTC P0302: NO. 2 CYLINDER MISFIRE DETECTED )
P0303 (73)ONo. 3 Cylinder Misfire DetectedONDTC Troubleshooting (see DTC P0303: NO. 3 CYLINDER MISFIRE DETECTED )
P0304 (74)ONo. 4 Cylinder Misfire DetectedONDTC Troubleshooting (see DTC P0304: NO. 4 CYLINDER MISFIRE DETECTED )
P0305 (75)ONo. 5 Cylinder Misfire DetectedONDTC Troubleshooting (see DTC P0305: NO. 5 CYLINDER MISFIRE DETECTED )
P0306 (76)ONo. 6 Cylinder Misfire DetectedONDTC Troubleshooting (see DTC P0306: NO. 6 CYLINDER MISFIRE DETECTED )
P0325 (23)OKnock Sensor Circuit MalfunctionONDTC Troubleshooting (see DTC P0325: KNOCK SENSOR CIRCUIT MALFUNCTION )
P0335 (4)Crankshaft Position (CKP) Sensor No SignalONDTC Troubleshooting (see DTC P0335: CKP SENSOR NO SIGNAL )
P0339 (4)Crankshaft Position (CKP) Sensor Circuit Intermittent InterruptionONDTC Troubleshooting (see DTC P0339: CKP SENSOR INTERMITTENT INTERRUPTION )
P0351 (71)No. 1 Cylinder Ignition Coil Circuit MalfunctionONDTC Troubleshooting (see DTC P0351: NO. 1 CYLINDER IGNITION COIL CIRCUIT MALFUNCTION )
P0352 (72)No. 2 Cylinder Ignition Coil Circuit MalfunctionONDTC Troubleshooting (see DTC P0352: NO. 2 CYLINDER IGNITION COIL CIRCUIT MALFUNCTION )
P0353 (73)No. 3 Cylinder Ignition Coil Circuit MalfunctionONDTC Troubleshooting (see DTC P0353: NO. 3 CYLINDER IGNITION COIL CIRCUIT MALFUNCTION )
P0354 (74)No. 4 Cylinder Ignition Coil Circuit MalfunctionONDTC Troubleshooting (see DTC P0354: NO. 4 CYLINDER IGNITION COIL CIRCUIT MALFUNCTION )
P0355 (75)No. 5 Cylinder Ignition Coil Circuit MalfunctionONDTC Troubleshooting (see DTC P0355: NO. 5 CYLINDER IGNITION COIL CIRCUIT MALFUNCTION )
P0356 (76)No. 6 Cylinder Ignition Coil Circuit MalfunctionONDTC Troubleshooting (see DTC P0356: NO. 6 CYLINDER IGNITION COIL CIRCUIT MALFUNCTION )
P0365 (8)Camshaft Position (CMP) Sensor Circuit No SignalONDTC Troubleshooting (see DTC P0365: CMP SENSOR CIRCUIT NO SIGNAL )
P0369 (8)Camshaft Position (CMP) Sensor Circuit Intermittent InterruptionONDTC Troubleshooting (see DTC P0369: CMP SENSOR CIRCUIT INTERMITTENT INTERRUPTION )
P0400 (80)OExhaust Gas Recirculation (EGR) System Leak DetectedONDTC Troubleshooting (see DTC P0400: EGR SYSTEM LEAK DETECTED )
P0401 (80)OExhaust Gas Recirculation (EGR) Insufficient FlowONDTC Troubleshooting (see DTC P0401: EGR INSUFFICIENT FLOW )
P0404 (12)OExhaust Gas Recirculation (EGR) Valve Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P0404: EGR VALVE CIRCUIT RANGE/PERFORMANCE PROBLEM )
P0406 (12)OExhaust Gas Recirculation (EGR) Valve Position Sensor Circuit High VoltageONDTC Troubleshooting (see DTC P0406: EGR VALVE POSITION SENSOR CIRCUIT HIGH VOLTAGE )
P0420 (165)ORear Bank Catalyst System Efficiency Below Threshold (Bank 1)ONDTC Troubleshooting (see DTC P0420: REAR BANK CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 1) )
P0430 (166)OFront Bank Catalyst System Efficiency Below Threshold (Bank 2)ONDTC Troubleshooting (see DTC P0430: FRONT BANK CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK 2) )
P0443 (92)OEvaporative Emission (EVAP) Canister Purge Valve Circuit MalfunctionONDTC Troubleshooting (see DTC P0443: EVAP CANISTER PURGE VALVE CIRCUIT MALFUNCTION )
P0451 (91)OFuel Tank Pressure (FTP) Sensor Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P0451: FTP SENSOR RANGE/PERFORMANCE PROBLEM )
P0452 (91)OFuel Tank Pressure (FTP) Sensor Circuit Low VoltageONDTC Troubleshooting (see DTC P0452: FTP SENSOR CIRCUIT LOW VOLTAGE )
P0453 (91)OFuel Tank Pressure (FTP) Sensor Circuit High VoltageONDTC Troubleshooting (see DTC P0453: FTP SENSOR CIRCUIT HIGH VOLTAGE )
P0455 (90)OEvaporative Emission (EVAP) System Large Leak DetectedONDTC Troubleshooting (see DTC P0455: EVAP SYSTEM LARGE LEAK DETECTED )
P0456 (90)OEvaporative Emission (EVAP) System Very Small Leak DetectedONDTC Troubleshooting (see DTC P0456: EVAP SYSTEM VERY SMALL LEAK DETECTED )
P0457Evaporative Emission (EVAP) System Leak Detected/Fuel Fill Cap Loose or MissingOFFDTC Troubleshooting (see DTC P0457: EVAP SYSTEM LEAK DETECTED/FUEL FILL CAP LOOSE OR MISSING )
P0461Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Range/Performance ProblemOFFDTC Troubleshooting (see DTC P0461: FUEL LEVEL SENSOR (FUEL GAUGE SENDING UNIT) RANGE/PERFORMANCE PROBLEM )
P0462OFuel Level Sensor (Fuel Gauge Sending Unit) Circuit Low VoltageOFFDTC Troubleshooting (see DTC P0462: FUEL LEVEL SENSOR (FUEL GAUGE SENDING UNIT) CIRCUIT LOW VOLTAGE )
P0463OFuel Level Sensor (Fuel Gauge Sending Unit) Circuit High VoltageOFFDTC Troubleshooting (see DTC P0463: FUEL LEVEL SENSOR (FUEL GAUGE SENDING UNIT) CIRCUIT HIGH VOLTAGE )
P0496 (92)OEvaporative Emission (EVAP) System High Purge Flow DetectedONDTC Troubleshooting (see DTC P0496: EVAP SYSTEM HIGH PURGE FLOW )
P0497 (90)OEvaporative Emission (EVAP) System Low Purge Flow DetectedONDTC Troubleshooting (see DTC P0497: EVAP SYSTEM LOW PURGE FLOW )
P0498 (117)OEvaporative Emission (EVAP) Canister Vent Shut Valve Circuit Low VoltageONDTC Troubleshooting (see DTC P0498: EVAP CANISTER VENT SHUT VALVE CIRCUIT LOW VOLTAGE )
P0499 (117)OEvaporative Emission (EVAP) Canister Vent Shut Valve Circuit High VoltageONDTC Troubleshooting (see DTC P0499: EVAP CANISTER VENT SHUT VALVE CIRCUIT HIGH VOLTAGE )
P0506 (14)OIdle Control System RPM Lower than ExceptedONDTC Troubleshooting (see DTC P0506: IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED )
P0507 (14)OIdle Control System RPM Higher than ExceptedONDTC Troubleshooting (see DTC P0507: IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED )
P050A (167)OCold Start Idle Air Control System Performance ProblemONDTC Troubleshooting (see DTC P050A: COLD START IDLE AIR CONTROL SYSTEM PERFORMANCE PROBLEM )
P050B (167)OCold Start Ignition Timing Control System Performance ProblemONDTC Troubleshooting (see DTC P050B: COLD START IGNITION TIMING PERFORMANCE PROBLEM )
P0522 (22)ORocker Arm Oil Pressure Sensor Circuit Low VoltageONDTC Troubleshooting (see DTC P0522: ROCKER ARM OIL PRESSURE SENSOR CIRCUIT LOW VOLTAGE )
P0523 (22)ORocker Arm Oil Pressure Sensor Circuit High VoltageONDTC Troubleshooting (see DTC P0523: ROCKER ARM OIL PRESSURE SENSOR CIRCUIT HIGH VOLTAGE )
P0562Charging System Low VoltageOFFDTC Troubleshooting (see DTC P0562: CHARGING SYSTEM LOW VOLTAGE )
P0563OPowertrain Control Module (PCM) Power Source Circuit Unexpected VoltageOFFDTC Troubleshooting (see DTC P0563: PCM POWER SOURCE CIRCUIT UNEXPECTED VOLTAGE )
P0602 (196)Powertrain Control Module (PCM) Programming ErrorONDTC Troubleshooting (see DTC P0602: PCM PROGRAMMING ERROR )
P060A (131)Powertrain Control Module (PCM) Internal Control Module MalfunctionONDTC Troubleshooting (see DTC P060A: PCM (A/T SYSTEM) INTERNAL CONTROL MODULE MALFUNCTION )
P0615 (2)Starter Cut Relay STRLD Circuit MalfunctionOFFDTC Troubleshooting (see DTC P0615: STARTER CUT RELAY STRLD CIRCUIT MALFUNCTION )
P062F (131)Powertrain Control Module (PCM) Internal Control Module Keep Alive Memory (KAM) ErrorONDTC Troubleshooting (see DTC P062F: PCM INTERNAL CONTROL MODULE KEEP ALIVE MEMORY (KAM) ERROR )
P0630 (139)VIN Not Programmed or MismatchONDTC Troubleshooting (see DTC P0630: VIN NOT PROGRAMMED OR MISMATCH )
P0685 (135)OPowertrain Control Module (PCM) Power Control Circuit/Internal Circuit MalfunctionONDTC Troubleshooting (see DTC P0685: PCM POWER CONTROL CIRCUIT/INTERNAL CIRCUIT MALFUNCTION )
P1077 (106)OIntake Manifold Tuning (IMT) Valve Stuck in High RPM PositionONDTC Troubleshooting (see DTC P1077: IMT VALVE STUCK IN HIGH RPM POSITION )
P1078 (106)OIntake Manifold Tuning (IMT) Valve Stuck in Low RPM PositionONDTC Troubleshooting (see DTC P1078: IMT VALVE STUCK IN LOW RPM POSITION )
P1109 (13)OBarometric Pressure (BARO) Sensor Circuit Out of Range HighONDTC Troubleshooting (see DTC P1109: BARO SENSOR CIRCUIT OUT OF RANGE HIGH )
P1116 (86)OEngine Coolant Temperature (ECT) Sensor 1 Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P1116: ECT SENSOR 1 CIRCUIT RANGE/PERFORMANCE PROBLEM )
P1128 (5)OManifold Absolute Pressure (MAP) Sensor Signal Lower Than ExceptedONDTC Troubleshooting (see DTC P1128: MAP SENSOR SIGNAL LOWER THAN EXPECTED )
P1129 (5)OManifold Absolute Pressure (MAP) Sensor Signal Higher Than ExceptedONDTC Troubleshooting (see DTC P1129: MAP SENSOR SIGNAL HIGHER THAN EXPECTED )
P1172 (157)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Circuit Out of Range HighONDTC Troubleshooting (see DTC P1172: REAR A/F SENSOR (BANK 1, SENSOR 1) CIRCUIT OUT OF RANGE HIGH )
P1174 (158)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Circuit Out of Range HighONDTC Troubleshooting (see DTC P1174: FRONT A/F SENSOR (BANK 2, SENSOR 1) CIRCUIT OUT OF RANGE HIGH )
P1297OElectrical Load Detector (ELD) Circuit Low VoltageOFFDTC Troubleshooting (see DTC P1297: ELD CIRCUIT LOW VOLTAGE )
P1298OElectrical Load Detector (ELD) Circuit High VoltageOFFDTC Troubleshooting (see DTC P1298: ELD CIRCUIT HIGH VOLTAGE )
P1454 (91)OFuel Tank Pressure (FTP) Sensor Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P1454: FTP SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM )
P145C (90)OEvaporative Emission (EVAP) System Purge Flow MalfunctionONDTC Troubleshooting (see DTC P145C: EVAP SYSTEM PURGE FLOW MALFUNCTION )
P1549Charging System High VoltageOFFDTC Troubleshooting (see DTC P1549: CHARGING SYSTEM HIGH VOLTAGE )
P1658 (40)Electronic Throttle Control System (ETCS) Control Relay ON MalfunctionONDTC Troubleshooting (see DTC P1658: ETCS CONTROL RELAY ON MALFUNCTION )
P1659 (40)Electronic Throttle Control System (ETCS) Control Relay OFF MalfunctionONDTC Troubleshooting (see DTC P1659: ETCS CONTROL RELAY OFF MALFUNCTION )
P1683 (40)Throttle Valve Default Position Spring Performance ProblemONDTC Troubleshooting (see DTC P1683: THROTTLE VALVE DEFAULT POSITION SPRING PERFORMANCE PROBLEM )
P1684 (40)Throttle Valve Return Spring Performance ProblemONDTC Troubleshooting (see DTC P1684: THROTTLE VALVE RETURN SPRING PERFORMANCE PROBLEM )
P16BBAlternator B Terminal Circuit Low VoltageOFFDTC Troubleshooting (see DTC P16BB: ALTERNATOR B TERMINAL CIRCUIT LOW VOLTAGE )
P16BCAlternator FR Terminal Circuit/IGP Circuit Low VoltageOFFDTC Troubleshooting (see DTC P16BC: ALTERNATOR FR TERMINAL CIRCUIT/IGP CIRCUIT LOW VOLTAGE )
P16BD (2)Starter Cut Relay 2 MalfunctionOFFDTC Troubleshooting (see DTC P16BD: STARTER CUT RELAY 2 MALFUNCTION )
P16BE (2)Starter Cut Relay 1 MalfunctionOFFDTC Troubleshooting (see DTC P16BE: STARTER CUT RELAY 1 MALFUNCTION )
P16BF (2)Starter Cut Relay STRLY Circuit MalfunctionOFFDTC Troubleshooting (see DTC P16BF: STARTER CUT RELAY STRLY CIRCUIT MALFUNCTION )
P2101 (40)Electronic Throttle Control System (ETCS) MalfunctionONDTC Troubleshooting (see DTC P2101: ETCS MALFUNCTION )
P2118 (40)Throttle Actuator Current Range/Performance ProblemONDTC Troubleshooting (see DTC P2118: THROTTLE ACTUATOR CURRENT RANGE/PERFORMANCE PROBLEM )
P2122 (37)Accelerator Pedal Position (APP) Sensor A (Throttle Position (TP) Sensor D) Circuit Low VoltageONDTC Troubleshooting (see DTC P2122: APP SENSOR A (TP SENSOR D) CIRCUIT LOW VOLTAGE )
P2123 (37)Accelerator Pedal Position (APP) Sensor A (Throttle Position (TP) Sensor D) Circuit High VoltageONDTC Troubleshooting (see DTC P2123: APP SENSOR A (TP SENSOR D) CIRCUIT HIGH VOLTAGE )
P2127 (37)Accelerator Pedal Position (APP) Sensor B (Throttle Position (TP) Sensor E) Circuit Low VoltageONDTC Troubleshooting (see DTC P2127: APP SENSOR B (TP SENSOR E) CIRCUIT LOW VOLTAGE )
P2128 (37)Accelerator Pedal Position (APP) Sensor B (Throttle Position (TP) Sensor E) Circuit High VoltageONDTC Troubleshooting (see DTC P2128: APP SENSOR B (TP SENSOR E) CIRCUIT HIGH VOLTAGE )
P2135 (7)Throttle Position (TP) Sensor A/B Incorrect Voltage CorrelationONDTC Troubleshooting (see DTC P2135: TP SENSOR A/B INCORRECT VOLTAGE CORRELATION )
P2138 (37)Accelerator Pedal Position (APP) Sensor A/B (Throttle Position (TP) Sensor D/E) Incorrect Voltage CorrelationONDTC Troubleshooting (see DTC P2138: APP SENSOR A/B (TP SENSOR D/E) INCORRECT VOLTAGE CORRELATION )
P2176 (40)Throttle Actuator Control System Idle Position Not LearnedONDTC Troubleshooting (see DTC P2176: THROTTLE ACTUATOR CONTROL SYSTEM IDLE POSITION NOT LEARNED )
P2183 (192)OEngine Coolant Temperature (ECT) Sensor 2 Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P2183: ECT SENSOR 2 CIRCUIT RANGE/PERFORMANCE PROBLEM )
P2184 (192)OEngine Coolant Temperature (ECT) Sensor 2 Circuit Low VoltageONDTC Troubleshooting (see DTC P2184: ECT SENSOR 2 CIRCUIT LOW VOLTAGE )
P2185 (192)OEngine Coolant Temperature (ECT) Sensor 2 Circuit High VoltageONDTC Troubleshooting (see DTC P2185: ECT SENSOR 2 CIRCUIT HIGH VOLTAGE )
P2195 (155)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Signal Stuck LeanONDTC Troubleshooting (see DTC P2195: REAR A/F SENSOR (BANK 1, SENSOR 1) SIGNAL STUCK LEAN )
P2197 (156)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Signal Stuck LeanONDTC Troubleshooting (see DTC P2197: FRONT A/F SENSOR (BANK 2, SENSOR 1) SIGNAL STUCK LEAN )
P2227 (13)OBarometric Pressure (BARO) Sensor Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P2227: BARO SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM )
P2228 (13)OBarometric Pressure (BARO) Sensor Circuit Low VoltageONDTC Troubleshooting (see DTC P2228: BARO SENSOR CIRCUIT LOW VOLTAGE )
P2229 (13)OBarometric Pressure (BARO) Sensor Circuit High VoltageONDTC Troubleshooting (see DTC P2229: BARO SENSOR CIRCUIT HIGH VOLTAGE )
P2237 (155)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) IP Circuit High VoltageONDTC Troubleshooting (see DTC P2237: REAR A/F SENSOR (BANK 1, SENSOR 1) IP CIRCUIT HIGH VOLTAGE )
P2238 (155)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) IP Circuit Low VoltageONDTC Troubleshooting (see DTC P2238: REAR A/F SENSOR (BANK 1, SENSOR 1) IP CIRCUIT LOW VOLTAGE )
P2240 (156)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) IP Circuit High VoltageONDTC Troubleshooting (see DTC P2240: FRONT A/F SENSOR (BANK 2, SENSOR 1) IP CIRCUIT HIGH VOLTAGE )
P2241 (156)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) IP Circuit Low VoltageONDTC Troubleshooting (see DTC P2241: FRONT A/F SENSOR (BANK 2, SENSOR 1) IP CIRCUIT LOW VOLTAGE )
P2243 (155)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VCENT Circuit High VoltageONDTC Troubleshooting (see DTC P2243: REAR A/F SENSOR (BANK 1, SENSOR 1) VCENT CIRCUIT HIGH VOLTAGE )
P2245 (155)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VCENT Circuit Low VoltageONDTC Troubleshooting (see DTC P2245: REAR A/F SENSOR (BANK 1, SENSOR 1) VCENT CIRCUIT LOW VOLTAGE )
P2247 (156)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VCENT Circuit High VoltageONDTC Troubleshooting (see DTC P2247: FRONT A/F SENSOR (BANK 2, SENSOR 1) VCENT CIRCUIT HIGH VOLTAGE )
P2249 (156)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VCENT Circuit Low VoltageONDTC Troubleshooting (see DTC P2249: FRONT A/F SENSOR (BANK 2, SENSOR 1) VCENT CIRCUIT LOW VOLTAGE )
P2251 (155)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VS Circuit High VoltageONDTC Troubleshooting (see DTC P2251: REAR A/F SENSOR (BANK 1, SENSOR 1) VS CIRCUIT HIGH VOLTAGE )
P2252 (155)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VS Circuit Low VoltageONDTC Troubleshooting (see DTC P2252: REAR A/F SENSOR (BANK 1, SENSOR 1) VS CIRCUIT LOW VOLTAGE )
P2254 (156) '10 modelOFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VS Circuit High VoltageONDTC Troubleshooting (see DTC P2254: FRONT A/F SENSOR (BANK 2, SENSOR 1) VS CIRCUIT HIGH VOLTAGE )
P2254 (156) '11 modelOFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VS Circuit High VoltageONDTC Troubleshooting (see DTC P2254: FRONT A/F SENSOR (BANK 2, SENSOR 1) VS CIRCUIT HIGH VOLTAGE )
P2255 (156)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VS Circuit Low VoltageONDTC Troubleshooting (see DTC P2255: FRONT A/F SENSOR (BANK 2, SENSOR 1) VS CIRCUIT LOW VOLTAGE )
P2279 (109)OIntake Air System LeakONDTC Troubleshooting (see DTC P2279: INTAKE AIR SYSTEM LEAK )
P2413 (12)OExhaust Gas Recirculation (EGR) System MalfunctionONDTC Troubleshooting (see DTC P2413: EGR SYSTEM MALFUNCTION )
P2422 (117)OEvaporative Emission (EVAP) Canister Vent Shut Valve Stuck Closed MalfunctionONDTC Troubleshooting (see DTC P2422: EVAP CANISTER VENT SHUT VALVE STUCK CLOSED MALFUNCTION )
P2610 (132)Powertrain Control Module (PCM) Ignition Off Internal Timer MalfunctionONDTC Troubleshooting (see DTC P2610: PCM IGNITION OFF INTERNAL TIMER MALFUNCTION )
P2648 (21)Rocker Arm Oil Control Solenoid A (Bank 1) Circuit Low VoltageONDTC Troubleshooting (see DTC P2648: ROCKER ARM OIL CONTROL SOLENOID A (BANK 1) CIRCUIT LOW VOLTAGE )
P2649 (21)Rocker Arm Oil Control Solenoid A (Bank 1) Circuit High VoltageONDTC Troubleshooting (see DTC P2649: ROCKER ARM OIL CONTROL SOLENOID A (BANK 1) CIRCUIT HIGH VOLTAGE )
P2653 (38)Rocker Arm Oil Control Solenoid B (Bank 1) Circuit Low VoltageONDTC Troubleshooting (see DTC P2653: ROCKER ARM OIL CONTROL SOLENOID B (BANK 1) CIRCUIT LOW VOLTAGE )
P2654 (38)Rocker Arm Oil Control Solenoid B (Bank 1) Circuit High VoltageONDTC Troubleshooting (see DTC P2654: ROCKER ARM OIL CONTROL SOLENOID B (BANK 1) CIRCUIT HIGH VOLTAGE )
P2658 (130)Rocker Arm Oil Control Solenoid A (Bank 2) Circuit Low VoltageONDTC Troubleshooting (see DTC P2658: ROCKER ARM OIL CONTROL SOLENOID A (BANK 2) CIRCUIT LOW VOLTAGE )
P2659 (130)Rocker Arm Oil Control Solenoid A (Bank 2) Circuit High VoltageONDTC Troubleshooting (see DTC P2659: ROCKER ARM OIL CONTROL SOLENOID A (BANK 2) CIRCUIT HIGH VOLTAGE )
P2A00 (157)ORear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P2A00: REAR A/F SENSOR (BANK 1, SENSOR 1) RANGE/PERFORMANCE PROBLEM )
P2A03 (158)OFront Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Circuit Range/Performance ProblemONDTC Troubleshooting (see DTC P2A03: FRONT A/F SENSOR (BANK 2, SENSOR 1) RANGE/PERFORMANCE PROBLEM )
P3400 (114)(3) o (4)Valve Pause System (VPS) Stuck Off Bank 1ONDTC Troubleshooting (see DTC P3400: VPS STUCK OFF BANK 1 )
P3497 (114)(3) o (4)Valve Pause System (VPS) Stuck Off Bank 2ONDTC Troubleshooting (see DTC P3497: VPS STUCK OFF BANK 2 )
U0029 (126)F-CAN Malfunction (BUS-OFF (Powertrain Control Module (PCM)))ONDTC Troubleshooting (see DTC U0029: F-CAN MALFUNCTION (BUS-OFF (PCM)) )
U0114 (5)F-CAN Malfunction (Powertrain Control Module (PCM)-VTM-4 Control Unit)OFFDTC Troubleshooting (see DTC U0114: F-CAN MALFUNCTION (PCM-VTM-4 CONTROL UNIT) )
U0122F-CAN Malfunction (Powertrain Control Module (PCM) - VSA Modulator-Control Unit)OFFDTC Troubleshooting (see DTC U0122: F-CAN MALFUNCTION (PCM-VSA MODULATOR-CONTROL UNIT) )
U0155 (126)F-CAN Malfunction (Powertrain Control Module (PCM)-Gauge Control Module)ONDTC Troubleshooting (see DTC U0155: F-CAN MALFUNCTION (PCM-GAUGE CONTROL MODULE) )
U0300 (131)PGM-FI System and A/T System Program Version MismatchONDTC Troubleshooting (see DTC U0300: PGM-FI SYSTEM AND A/T SYSTEM PROGRAM VERSION MISMATCH )
U1101F-CAN Malfunction (Powertrain Control Module (PCM) - Engine Mount Control Unit)OFFDTC Troubleshooting (see DTC U1101: F-CAN MALFUNCTION (PCM-ACM) )
NOTE: The above DTCs are indicated when the PGM-FI system is selected with the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. (1) These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. Some DTCs do not cause the MIL to blink when the SCS line is jumped. The last four characters of these DTCs are shown in the gauge display. (2) The starter system warning message or starter system indicator may come on. (3) One drive cycle detection in all cylinder activation modes. (4) Two drive cycle detection when in cylinder pause driving mode. (5) With VTM-4 system
NOTE
The above DTCs are indicated when the PGM-FI system is selected with the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs.
(1)These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. Some DTCs do not cause the MIL to blink when the SCS line is jumped. The last four characters of these DTCs are shown in the gauge display.
(2)The starter system warning message or starter system indicator may come on.
(3)One drive cycle detection in all cylinder activation modes.
(4)Two drive cycle detection when in cylinder pause driving mode.
(5)With VTM-4 system

DTC TROUBLESHOOTING TABLE

Symptom Troubleshooting Index

When the vehicle has one of these symptoms, check for a diagnostic trouble code (DTC) with the HDS. If there is no DTC, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.

SymptomDiagnostic procedureAlso check for
Engine will not start (MIL works OK, no DTCs set)Test the battery (see BATTERY TEST ). Test the starter (see STARTER PERFORMANCE TEST ). Check the fuel pressure (see FUEL PRESSURE TEST ). Troubleshoot the fuel pump circuit (see FUEL PUMP CIRCUIT TROUBLESHOOTING ).Low compression No ignition spark Intake air leaks Locked up engine Broken timing belt Fuel contamination
Engine will not start (MIL comes on and stays on, no DTCs set)Troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).No power to PCM No ground to PCM
MIL comes on and stays on, or never comes on at all, no DTCs setTroubleshoot the MIL circuit (see MIL CIRCUIT TROUBLESHOOTING ).
Engine will not start (MIL works OK, no DTCs set, immobilizer indicator stays on or flashes)Check the immobilizer system (see SYSTEM CHECK ).
Engine starts but stalls immediately (MIL works OK, no DTCs set, immobilizer indicator stays on or flashes)Check the immobilizer system (see SYSTEM CHECK ).
Engine is hard starting (MIL works OK, no DTCs set)Test the battery (see BATTERY TEST ). Check the fuel pressure (see FUEL PRESSURE TEST ). Clean the throttle body (see THROTTLE BODY CLEANING ).Low compression Intake air leaks Fuel contamination Weak spark
Cold fast idle too low (MIL works OK, no DTCs set)Do PCM IDLE LEARN PROCEDURE . Check the idle speed (see IDLE SPEED INSPECTION ). Clean the throttle body (see THROTTLE BODY CLEANING
Cold fast idle too high (MIL works OK, no DTCs set)Do PCM IDLE LEARN PROCEDURE . Check the idle speed (see IDLE SPEED INSPECTION ). Do THROTTLE POSITION LEARNING CHECK .Intake air leaks
Idle speed fluctuates (MIL works OK,no DTCs setDo the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ) Check the idle speed (see IDLE SPEED INSPECTION ) Do the carbon accumulation check (see CARBON ACCUMULATION CHECK ) Troubleshoot the A/C signal circuit (see A/C SIGNAL CIRCUIT TROUBLESHOOTING )Incorrect Valve timing or clearance adjustment Intake air leaks
After warming up, idle speed is below specifications without load (MIL works OK, no DTCs set)Troubleshoot the alternator FR signal circuit (see ALTERNATOR FR SIGNAL CIRCUIT TROUBLESHOOTING ). Do the carbon accumulation check (see CARBON ACCUMULATION CHECK ).Incorrect valve adjustment
After warming up, idle speed is above specifications without load (MIL works OK, no DTCs set)Troubleshoot the alternator FR signal circuit (see ALTERNATOR FR SIGNAL CIRCUIT TROUBLESHOOTING ). Inspect the APP sensor (see APP SENSOR SIGNAL INSPECTION ).Intake vacuum leaks
After warming up, idle speed drops when steering wheel is turned (MIL works OK, no DTCs set)Do PCM IDLE LEARN PROCEDURE . Troubleshoot the PSP switch signal circuit (see PSP SWITCH SIGNAL CIRCUIT TROUBLESHOOTING ). Do CARBON ACCUMULATION CHECK .Power steering system problems
Low power (MIL works OK, no DTCs set)Check the fuel pressure (see FUEL PRESSURE TEST ).Low compression Incorrect camshaft timing Incorrect engine oil level Exhaust restriction
Engine stalls (MIL works OK, no DTCs set)Do PCM IDLE LEARN PROCEDURE . Check the fuel pressure (see FUEL PRESSURE TEST ). Check the idle speed (see IDLE SPEED INSPECTION ). Troubleshoot the brake pedal position switch signal circuit (see BRAKE PEDAL POSITION SWITCH SIGNAL CIRCUIT TROUBLESHOOTING ).Intake air leaks Faulty harness and sensor connections
Difficult to refuel (MIL works OK, no DTCs set)Check the fuel tank vapor control valve hose between the EVAP canister and fuel tank. Check the fuel tank vapor recirculation tube between the fuel filler pipe and the fuel tank. Inspect the fuel filler neck for restrictions. Replace the fuel tank (see FUEL TANK REPLACEMENT ).Malfunctioning gas station filling nozzle
Fuel overflows during refueling (No DTCs set)Inspect the fuel filler neck for restrictions. Replace the fuel tank (see FUEL TANK REPLACEMENT ).Malfunctioning gas station filling nozzle
Fuel cap warning message stays on (MIL works OK, no DTCs set)Troubleshoot the fuel cap warning message system (see DTC P145C: EVAP SYSTEM PURGE FLOW MALFUNCTION ).
HDS does not communicate with the PCM or the vehicleTroubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).Correct HDS software Shorted reference voltage
Engine will not crankTest the battery Check the starting system (see STARTER SYSTEM CIRCUIT TROUBLESHOOTING ).Shorted reference voltage

TROUBLESHOOTING TABLE

Scheme 2

Scheme 2: Fuel and Emissions System Diagram

Scheme 3

Scheme 3: Vacuum Hose Routing Diagram