Mercedes W202 OBD-II Codes
1997-2000

NOTE: This repair was done on my 1994 C280. However it may work for other years/models. I cannot guarantee 100% accuracy nor can I be liable for any damage one can cause to his or her car or self.

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Glossary of Acronyms

DTC SAE Nomenclature Explanation
P0100 MAF Circuit Malfunction Hot film MAF sensor
P0105 MAP circuit malfunction Pressure sensor
P0110 IAT circuit malfunction IAT sensor (in hot film MAF sensor)
P0115 ECT circuit malfunction ECT sensor
P0120 Throttle Position Circuit Malfunction Actual value potentiometer in actuator
P0130 O2S 1 circuit malfunction O2S (before TWC) voltage increase insufficient
P0133 O2S 1 Circuit Slow Response O2S 1 (before TWC) A. Aging correction value exceede.
B. Aging time period too long
C. Sensor response too slow long.
P0135 O2S 1 heater circuit malfunction O2S 1 heater (before TWC)
P0136 O2S 2 circuit malfunction O2S (after TWC)
P0140 O2S 1 circuit malfunction O2S (before TWC)
P0141 O2S 2 heater circuit malfunction Right O2S 2 heater (after TWC)
P0150 O2S 1 circuit malfunction A. O2S 1 heater (before TWC)
B. O2S 1 heater (before TWC) voltage increase too slow
P0153 O2S 1 circuit slow response A. O2S 1 heater (before TWC), aging correction value exceeded
B. O2S 1 heater (before TWC) aging time period too long
C. O2S1 heater (before TWC), aging O2S1 sensor reponse too slow
P0155 O2S 2 heater circuit malfunction Left O2S 2 (before TWC)
P0156 O2S 2 circuit malfunction Left O2S 2 (after TWC)
P0160 O2S 2 heater circuit malfunction Left O2S 2 heater(before TWC)
P0161 O2S 2 heater circuit malfunction Left O2S 2 (after TWC)
P0170 Fuel trim malfunction A. Self adaptation of fuel mixture "partial load" (Inline 6, Inline 4 (Right cylinder bank for V6) at limit from engine control module.
B. Self adaptation of fuel mixture "CTP" (Inline 6, Inline 4 (Right cylinder bank for V6) at limit from engine control module.
P0173 Fuel trim malfunction A. Self adaptation of fuel mixture "partial load" left cylinder bank (V6) at limit from engine control module.
B. Self adaptation of fuel mixture "CTP", left cylinder bank (V6) at limit from engine control module.
P0201 Injector circuit malfunction - cyl 1 Injector - Cylinder 1
P0202 Injector circuit malfunction - cyl 2 Injector - Cylinder 2
P0203 Injector circuit malfunction - cyl 3 Injector - Cylinder 3
P0204 Injector circuit malfunction - cyl 4 Injector - Cylinder 4
P0205 Injector circuit malfunction - cyl 5 Injector - Cylinder 5
P0206 Injector circuit malfunction - cyl 6 Injector - Cylinder 6
P0207 Injector circuit malfunction - cyl 7 Injector - Cylinder 7
P0208 Injector circuit malfunction - cyl 8 Injector - Cylinder 8
P0243 Recirculated air flap actuator for supercharger For engine with supercharger only
P0300 Random misfire detected A. Random misfire
B. Random misfire, TWC damaging
P0301 Cylinder 1 misfire detected Cylinder 1 misfire, TWC damaging
P0302 Cylinder 2 misfire detected Cylinder 2 misfire, TWC damaging
P0303 Cylinder 3 misfire detected Cyilnder 3 misfire, TWC damaging
P0304 Cylinder 4 misfire detected Cylinder 4 misfire, TWC damaging
P0305 Cylinder 5 misfire detected Cylinder 5 misfire, TWC damaging
P0306 Cylinder 6 misfire detected Cylinder 6 misfire, TWC damaging
P0307 Cylinder 7 misfire detected Cylinder 7 misfire, TWC damaging
P0308 Cylinder 8 misfire detected Cylinder 8 misfire, TWC damaging
P0325 KS 1 circuit malfunction Front KS 1
P0330 KS 2 circuit malfunction Rear KS 2
P0335 CKP sensor circuit malfunction CKP sensor
P0341 CMP sensor circuit range/performance Camshaft Hall-effect sensor
P0370 Angle deviation between camshaft and crankshaft Angle deviation between camshaft and crankshaft
P0400 Exhaust gas recirculation flow malfunction Exhaust gas recirculation malfunction (logic chain)
P0410 Air injection system malfunction AIR system malfunction (logic chain)
P0422 TWC efficiency below threshold (left on V6) TWC efficiency below threshold (left on V6)
P0432 TWC efficiency below threshold (Right on V6) TWC efficiency below threshold (Right on V6)
P0440 EVAP system malfunction EVAP system leak (logic chain)
P0441 EVAP system incorrect purge flow EVAP not functioning
P0442 EVAP system leak detected (small leak) EVAP system small leak
P0443 EVAP system purge control valve circuit malfunction Purge control valve
P0446 EVAP system vent control malfunction A. Activated charcoal canister shut-off valve
B. End stage activated charcoal canister shut-off valve
P0450 EVAP system pressure sensor malfunction A. Fuel tank pressure sensor electrical fault
B. Fuel tank pressure sensor electrical fluctuations
C. Purge monitoring pressure sensor
P0455 EVAP system leak detected (large leak) EVAP system, large leak
Fuel tank pressure sensor
P0460 Fuel level sensor circuit low input Fuel tank level too low
P0500 VSS sensor malfunction A. VSS left front
B. VSS left rear
P0507 ISC RPM higher than expected Idle control system
P0560 System voltage malfunction Voltage supply at engine control module
P0565 Cruise Control Switch CC Switch
P0600 Serial communication link malfunction CAN bus from ESP/SPS control module
P0604 Internal control module random access memory (RAM) error Engine control module
P0605 Internal control module read only memory (ROM) error Engine control module
P0700 Transmission control system malfunction Read DTC memory of transmission control module
P0702 Transmission control system electrical Read DTC memory of transmission control module
P0715 Input/turbine speed sensor circuit malfunction Read DTC memory of transmission control module
P0720 Output speed sensor circuit malfunction Read DTC memory of transmission control module
P0730 Incorrect gear ratio Read DTC memory of transmission control module
P0740 Torque converter clutch circuit malfunction Read DTC memory of transmission control module
P0743 Torque converter clutch circuit electrical Read DTC memory of transmission control module
P0748 Pressure control solenoid electrical Read DTC memory of transmission control module
P0753 Shift solenoid A electrical Read DTC memory of transmission control module
P0758 Shift solenoid B electrical Read DTC memory of transmission control module
P0763 Shift solenoid C electrical Read DTC memory of transmission control module
P0801 Engine/climate control electric cooling fan malfunction Engine/climate control electric cooling fan
P0802 Resonance intake manifold switchover valve Resonance intake manifold switchover valve
P0803 Air flap/air filter actuator malfunction Air flap/air filter actuator
P0805 Supercharger function Supercharger function
P0806 Magnetic supercharger clutch Magnetic supercharger clutch
P0809 Angle deviation between camshaft and crankshaft Angle deviation between camshaft and crankshaft
P0811 CAN from electronic ignition lock CAN from electronic ignition lock
P1031 O2 sensors reversed O2 sensors reversed
P1163 Oil level switch Oil level switch
P1177 Oil sensor Oil sensor, Oil temperature implausible
P1178 Oil sensor Oil sensor, Oil level implausible
P1179 Oil sensor Oil sensor, Oil quality implausible
P1180 Oil sensor Oil sensor, Oil temperature too high
P1181 Engine/climate control electric cooling fan malfunction Engine/climate control electric cooling fan functional fault
P1182 A. Starter lockout relay module
B. Starter relay
Starter relay in passenter-side fuse and relay module box
P1185 Oil sensor Oil sensor, water in oil
P1186 Fuel safety shut-off recognized EA/CC/ISC actuator
P1225 Resonance intake manifold switchover valve Resonance intake manifold switchover valve
P1225 Throttle valve setting Throttle valve setting element sticks due to icing
P1233 EA/CC/ISC actuator icing problem EA/CC/ISC actuator icing problem
P1235 Supercharger function Supercharger function
P1236 Magnetic super charger clutch Magnetic clutch function
P1386 Knock sensor control from ECM at end stop Knock sensor regulation from engine control module at end stop
P1400 EGR switchover valve malfunction EGR switchover valve
P1420 AIR pump switchover valve AIR pump switchover valve
P1453 AIR relay module AIR relay module in passenger-side fuse and relay module box
P1491 Refridgerant pressure in A/C system too high Refridgerant pressure in A/C system too high
P1519 Adjustable camshaft timing solenoid Adjustable camshaft timing solenoid (logic chain)
P1525 Adjustable camshaft timing solenoid Adjustable camshaft timing solenoid
P1542 Pedal value sensor Pedal value sensor
P1570 CAN signal from DAS control module to engine control module A. Start attempt with "locked" DAS
B. CAN signal from DAS control module to engine control module interrupted.
C. Engine control module and DAS control module are not compatible.
P1580 EA/CC/ISC actuator Throttle valve setting element
P1584 Stop lamp switch Stop lamp switch
P1603 CAN signal from EIS CAN failure
P1605   Poor road/traction condition recognition signal (via comparison of VSS rpm signals)
P1642 Engine control module incorrectly coded Engine control module incorrectly coded (Coded for MT, vehicle has AT)
P1643 Engine control module incorrectly coded OR
No CAN transmission from transmission control module
Engine control module incorrectly coded (Coded for MT, vehicle has AT) OR
No CAN transmission from transmission control module
P1644 Transmission version cannot be checked due to low voltage at transmission control module Transmission version cannot be checked due to low voltage at transmission control module control module
P1681 Crash signal not plausible  
P1747 CAN signal from ETC A. CAN failure: Transmission protection malfunction from transmission control module
B. CAN failure: Instrument cluster

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Copyright. Martin Kosonen. 2010.