Mercedes W202 OBD-II Codes (P-codes)
1994-1996


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| Table list of Codes | List of codes with possible causes | Glossary of Acronyms |

Here is a list of most of the OBD-II codes and their description. These codes can be pulled from the OBD-II computer with a scantool. Many automotive retail supply stores will do this for you for free.

P0101 Mass or volume air flow circuit range/performance problem (Hot film MAF sensor)
P0105 Manifold absolute pressure implausible
P0111 Intake air temperature circuit range/performance problem (IAT sensor)
P0116 Engine coolant temperature circuit range/performance problem (ECT sensor)
P0125 Insufficient coolant temperature for closed loop fuel control
P0131 O2S 1 (Before TWC) circuit low voltage
P0132 O2S 1 (Before TWC) circuit high voltage
P0133 O2S 1 (Before TWC) circuit slow response
P0134 O2S 1 (Before TWC) circuit no activity detected
P0135 O2S 1 (Before TWC) heater circuit malfunction
P0138 O2S 1 (After TWC) circuit high voltage
P0141 O2S 1 (After TWC) heater circuit malfunction
P0170 Fuel trim malfunction (self adaptation of fuel mixture)
P0200 Injector circuit malfunction
P030x TWC protection single cyliner misfire (Single cylinder combustion misfire within 200 engine revolutions)
P0300 TWC protection random cylinder misfire
P030x FTP standards single cylinder misfire (Single cylinder combustion misfire within 1000 engine revolutions)
P0300 FTP standards random cylinder misfire (Random cylinder combustion misfire within 1000 engine revolutions
P030x I/M test single cylinder misfire (Random cylinder combustion misfire within 1000 engine revolutions)
P0325 Knock sensor 1: control range end stop
P0326 Knock sensor 1: circuit range/performance
P0327 Knock sensor 1: sensor signals
P0335 CKP sensor circuit malfunction
P0341 CMP sensor
P0400 Exhaust gas recirculation flow malfunction
P0411 Secondary air injection incorrect flow detected
P0412 Secondary air injection (AIR) system switching valve/circuit malfunction
P0420 Catalyst system efficiency below threshold
P0441 EVAP without function (logic chain)
P0443 Evaporative emission control system (EVAP) purge control valve circuit malfunction (Purge control valve)
P0500 Vehicle speed implausible
P0501 Vehicle speed signal implausible
P0505 Idle control system malfunction
P0507 Idle control system RPM higher than expected
P0510 CTP information: Air mass implausible
P0600 Serial communications link malfunction (CAN)
P1131 O2S 1 (before TWC) circuit short circuit
P1132 O2S 1 (before TWC) circuit "rich" stop
P1137 O2S (after TWC) circuit short circuit
P1138 O2S (after TWC) operating condition
P1170 Short term fuel trim (self-adaption to fuel mixture)
P1335 Engine speed signal TNA from diagnostic module (OBD II) not received
P1336 CKP sensor signal: Magnet coding on segment
P1337 Engine speed signal TNA not transmitted from engine control module
P1340 CMP sensor monitoring signal from engine control module
P1341 Adjustable camshaft timing solenoid without function (logic chain)
P1342 Electrical activation of adjustable camshaft timing solenoid
P1400 Electrical activation of the EGR switchover valve
P1443 Electrical activation of the purge flow switchover valve
P1444 Pressure switchover without function (logic chain)
P1700 Transmission upshift delay switchover valve withought function (logic chain)
P1701 Electrical activation of upshift delay switchover valve
P1711 Electrical activation of resonance intake manifold switchover valve
P1740 Full load information: Load implausible
P1741 Full load information: Throttle valve position implausible
P1750 Diagnostic module voltage supply from circuit 30 too low



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Copyright. Martin Kosonen. 2010.