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Engine Controls - Tests W/codes: Overview Mercedes-Benz S-class W140

HFM-SFI FAULT CODE IDENTIFICATION (S320)

Code (1)Code (2)Malfunctioning Component/System
002P0132(3) Oxygen Sensor (G3/2) Circuit High Voltage
003P0134(3) Oxygen Sensor (G3/2) Circuit No Activity
004P0131(3) Oxygen Sensor (G3/2) Circuit Low Voltage
005P1131(3) Oxygen Sensor (G3/2) Circuit: Short Circuit
006P0133(3) Oxygen Sensor (G3/2) Circuit Slow Response
007P0135(3) Oxygen Sensor (G3/2) Heater Ckt Malfunction
008P1132(3) Oxygen Sensor (G3/2) Circuit Rich Stop
009P0138(4) Oxygen Sensor (G3/1) Circuit High Voltage
011P0141(4) Oxygen Sensor (G3/1) Heater Ckt Malfunction
012P1137(4) Oxygen Sensor (G3/1) Circuit Short Circuit
013P1138(4) Oxygen Sensor (G3/1) Operating Condition
014P0412Secondary Air Injection System Switching Valve/Circuit Malfunction
015P0411Secondary Air Injection System Incorrect Flow Detected
016P1400Electrical Activation Of EGR Switchover Valve
017P0400EGR Flow Malfunction
018P0507Idle Control System RPM Higher Than Expected
019P0505Idle Control System Malfunction
020P030x (5)Cylinder X Misfire Detected
021P0300Random Misfire Detected
022P030x (5)Cylinder X Misfire Detected
023P0300Random Misfire Detected
024P030x (5)Cylinder X Misfire Detected
025P0300Random Misfire Detected
026P0420Catalyst System Efficiency Below Threshold
027P1342Electrical Activation Of Adjustable Camshaft Timing Solenoid
028P1341Adjustable Camshaft Timing Solenoid Without Function (Logic Chain)
029P0200Injector Circuit Malfunction
030P1170Shot Term Fuel Trim (Self-Adaptation Of Fuel Mixture)
031P0170Fuel Trim Malfunction
032P0443Evaporative Emission Purge Control Valve Circuit Malfunction
064P1443Electrical Activation Of Purge Flow Switchover Valve
065P0441EVAP Incorrect Purge Flow
066P1444Pressure Switchover W/O Function (Logic Chain)
032P1701Electrical Activation Of Upshift Delay Switchover Valve
034P1700Transmission Upshift Delay Switchover Valve Without Function (Logic Chain)
035P030x (5)Cylinder X Misfire Detected
036P0300Random Misfire Detected
037P030x (5)Cylinder X Misfire Detected
038P0300Random Misfire Detected
039P030x (5)Cylinder X Misfire Detected
040P0300Random Misfire Detected
042P1340Camshaft Position Sensor Monitoring From Engine Control Module
043P1335Engine Speed Signal From Diagnostic Module (OBD-II)
045P0116Engine Coolant Temp. Sensor Ckt Malfunction
046P0125Insufficient Coolant Temperature For Closed Loop Fuel Control
047P0111Intake Air Temperature Sensor Ckt Malfunction
048P0101Hot Film Mass Airflow Sensor Ckt Malfunction
049P0335Crankshaft Position Sensor Ckt Malfunction
050P1336Crankshaft Sensor Signal Malfunction
051P1337Engine Speed Signal Transmitted From Engine Control Module
052P1740Full Load Information (Load Implausible)
053P1741Full Load Information (Throttle Valve Position Implausible)
054P0510Closed Throttle Position Switch Malfunction
055P0600Serial Communication Link Malfunction Controller Area Network (CAN)
056P0500Vehicle Speed Sensor Malfunction
057P0501Vehicle Speed Sensor Range/Performance
058P0341Camshaft Position Sensor Ckt Malfunction
059P0105Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
060P0327Knock Sensor 1 Circuit Low Input
061P0326Knock Sensor 1 Circuit Range/Performance
062P0325Knock Sensor 1 Circuit Malfunction
063P1750Battery Voltage Low
(1) Using Hand-Held Tester (HHT) and multiplexer cable. (2) Using generic scan tool. (3) Oxygen sensor (G3/2) is located before Three-Way Catalyst (TWC). (4) Oxygen sensor (G3/1) is located after Three-Way Catalyst (TWC). (5) When reading fault codes, the "x" will show affected cylinder.
(1)Using Hand-Held Tester (HHT) and multiplexer cable.
(2)Using generic scan tool.
(3)Oxygen sensor (G3/2) is located before Three-Way Catalyst (TWC).
(4)Oxygen sensor (G3/1) is located after Three-Way Catalyst (TWC).
(5)When reading fault codes, the "x" will show affected cylinder.

HFM-SFI FAULT CODE IDENTIFICATION

LH-SFI FAULT CODE IDENTIFICATION

Fault CodeMalfunctioning Component/System
1(1) *
5Maximum Permissible Temperature In Module Box Exceeded
6A/C Compressor Electromagnetic Clutch Blocked Poly-V Belt Slipping
9Voltage Supply For LH-SFI Control Unit Interrupted
10Voltage Supply For LH-SFI Control Unit Interrupted Or Voltage Supply For Fuel Injectors Interrupted
11Voltage Supply For Accessory Equipment Control Units Interrupted
12Voltage Supply For ABS Control Unit Or ABS/ASR Control Unit Interrupted
15Voltage Supply For A/T Kickdown Valve Interrupted
16Voltage Supply For A/C Compressor Electromagnetic Clutch Interrupted
17Voltage Supply For Module Box Blower Motor Interrupted
(1) No faults in system.
(1)No faults in system.

BASE MODULE FAULT CODE ID

Fault CodeMalfunctioning Component/System
1(1) *
2Cruise Control/Idle Speed Control Unit
3Cruise Control/Idle Speed Control Actuator
4Cruise Control Switch
5Stop Light Switch
6Starter Lock-Out/Back-Up Light Switch
7Controller Area Network (CAN) Data Bus
8Left Front Speed Sensor
9Left Rear Speed Sensor
10TNA (Engine Speed) Signal
11Fuel Safety Shutoff To LH-SFI Control Unit
12Cruise Control/Idle Speed Control Unit Voltage Supply
(1) No faults in system.
(1)No faults in system.

CRUISE CONTROL/IDLE SPEED CONTROL MODULE FAULT CODE ID

Fault CodeMalfunctioning Component/System
1(1) *
2Oxygen Sensor Inoperative
3Lambda Control Inoperative
4Air Injection Inoperative
5Exhaust Gas Recirculation (EGR) Inoperative
6Idle Speed Control Inoperative
7Ignition System Failure
8Coolant Temperature Sensor Open Or Short Circuit
9Intake Air Temperature Sensor Open Or Short Circuit
10Voltage At Air Mass Sensor Too High Or Low
11TN (RPM) Signal Defective
12Oxygen Sensor Heater Open Or Short Circuit
13Camshaft Position Sensor Signal From EZL/AKR Ignition Control Unit Defective
14Intake Manifold Pressure At Start Too Low
15Full Throttle Information Defective
16Idle Speed Information Defective
17Controller Area Network (CAN) Data Exchange Malfunction Between Control Units
18Adjustable Camshaft Timing Solenoid Open Or Short Circuit
19Fuel Injectors Open Or Short Circuit Or Emission Control System Adaptation At Limit
20Speed Signal Missing
21Purge Switchover Valve Open Or Short Circuit
22Camshaft Position Sensor Signal Defective
23Intake Manifold Pressure With Engine Running Too Low
24Starter Ring Gear Segments Defective
25Knock Sensors Defective
26Upshift Delay Switchover Valve Open Or Short Circuit
27Coolant Temp. Sensor Deviation Between Sensor Circuit No. 1 & Sensor Circuit No. 2
28Coolant Temp. Sensor (Coolant Temperature Change Monitor)
(1) No faults in system.
(1)No faults in system.

DIAGNOSTIC MODULE FAULT CODE ID

Fault CodeMalfunctioning Component/System
1(1) *
2Electronic Accelerator Control Unit
3Electronic Accelerator Actuator
4Cruise Control Switch
5Stoplight Switch
6Starter Lock-Out/Back-Up Light Switch
7Controller Area Network (CAN) Data Bus
8Left Front Speed Sensor
9Left Rear Speed Sensor
10TNA (Engine Speed) Signal
11Fuel Safety Shutoff To LH Control Unit
12Electronic Accelerator Control Unit Voltage Supply
14Idle Speed Control Switch
(1) No faults in system.
(1)No faults in system.

ELECTRONIC ACCELERATOR CONTROL MODULE FAULT CODE ID

Fault CodeMalfunctioning Component/System
1(1) *
2Maximum Retard Setting On At Least 1 Cylinder Has Been Reached
3(2) *
4Load Sensor In EZL/AKR Ignition Control Unit Defective
5Knock Sensor No. 1 Or No. 2 Defective
6Camshaft Position Sensor Defective
7Knock Control Output Switch In EZL/AKR Ignition Control Unit Defective
8Transmission Overload Protection Switch Does Not Close
9Transmission Overload Protection Switch Does Not Open
10(2) *
11Reference Resistor Defective
12TN (Engine RPM) Signal Is Outside Tolerance Range
13-14(2) *
15Ignition Coil No. 1 Output From EZL/AKR Ignition Control Unit Defective Or Primary Winding Of Ignition Coil Has An Open Circuit
16Ignition Coil No. 2 Output From EZL/AKR Ignition Control Unit Defective Or Primary Winding Of Ignition Coil Has An Open Circuit
17Crankshaft Position Sensor Defective
18Magnets For Crankshaft Position Sensor Not Recognized
19(2) *
20EZL/AKR Ignition Control Unit Malfunction Memory Defective
21Load Sensor In EZL/AKR Ignition Control Unit Defective (Engine Running)
22-25(2) *
26EZL/AKR Ignition Control Unit Data Exchange Malfunction
27LH-SFI Control Unit Data Exchange Malfunction
28Electronic Accelerator Control Unit Data Exchange Malfunction
29-33(2) *
34Ignition Misfire Cylinder No. 1
35Ignition Misfire Cylinder No. 5
36Ignition Misfire Cylinder No. 3 (6-Cylinder)
36Ignition Misfire Cylinder No. 4 (V8)
37Ignition Misfire Cylinder No. 6 (6-Cylinder)
37Ignition Misfire Cylinder No. 8 (V8)
38Ignition Misfire Cylinder No. 2 (6-Cylinder)
38Ignition Misfire Cylinder No. 6 (V8)
39Ignition Misfire Cylinder No. 4 (6-Cylinder)
39Ignition Misfire Cylinder No. 3 (V8)
40Ignition Misfire Cylinder No. 7 (V8)
41Ignition Misfire Cylinder No. 2 (V8)
(1) No faults in system. (2) Not assigned.
(1)No faults in system.
(2)Not assigned.

EZL/AKR IGNITION CONTROL UNIT FAULT CODE ID

Fault CodeMalfunctioning Component/System
1(1) *
2Coolant Temp. Sensor Open Or Short In Ckt No. 1 (Terminal No. 31 On LH Control Unit Connector No. 2)
3Coolant Temp. Sensor Open Or Short In Ckt No. 2 (Terminal No. 18 On LH Control Unit Connector No. 2)
4Voltage At Air Mass Sensor Hot-Wire Too Low Or High, Or Open Ground Wire At Air Mass Sensor
5(2) *
6(2) *
7RPM (TN) Signal Incorrect Or Open Or Short Ckt
8Camshaft Position Sensor Signal Open Or Short Ckt
9Starter Signal Missing
10Idle Speed Recognition From Electronic Accelerator Module Or Cruise Control/Idle Speed Control Module Short Ckt
11Air Injection System Open Or Short Ckt
12Burn-Off Control For Air Mass Sensor Open Or Short Ckt
13Intake Air Temp. Sensor Open Or Short Ckt
14(2) *
15(2) *
16EGR Switchover Valve Open Or Short Ckt
17No Data Transmission From Electronic Accelerator Module Or Cruise Control/Idle Speed Control Module
18No Data Transmission From EZL/AKR Ignition Control Unit
19(2) *
20No Data Transmission From LH Control Unit
21Oxygen Sensor Open ckt
22Oxygen Sensor Heater Open Or Short ckt
23Purge Switchover Valve Open Or Short ckt
24Adjustable Camshaft Timing Solenoid Or Right Adjustable Camshaft Timing Solenoid Open Or Short ckt
25Left Adjustable Camshaft Timing Solenoid Open Or Short ckt
26(2) *
27Fuel Injector Open Or Short ckt
28LH Control Unit Coding Open ckt
(1) No faults in system. (2) Not assigned.
(1)No faults in system.
(2)Not assigned.

LH-SFI CONTROL UNIT FAULT CODE ID

ON/OFF RATIO IDENTIFICATION

Note. On/off ratio is not used to diagnose HFM-SFI vehicles.