Mercedes C-Class – CL – CLK – CLS – E-Class – G-Class – GL – M-Class – R-Class – S-Class – SL- Class – SLK (2002 – 2008) OBD1 Codes

Model:	Engine identification:	Year:	System
C-Ciass (203)	272	2006-08	Bosch ME 2.7/2.7.1/2.8/2.8.1/9.7
C-Ciass (204)	272	2008
CL (215)	137	2005-06
CL (216)	156/273/275	2007-08
CLK (209)	156/2721273	2006-08
CLS (219)	113/156/273	2005-08
E-Ciass (211)	112/113/156/272/273/642/648	2003-08
G-Ciass (463)	113	2002-08
GL (164)	273/642	2007-08
M-Ciass (164)	113/156/272/273/642	2005-08
R-Ciass (251)	113/156/272/642	2006-08
5-Ciass (220)	112/137/273/275	2005-06
S-CIass (221)	156/273/275	2007-08
SL-Ciass (230)	113/273/275	2005-08
SLK (171)	113/272	2005-08

General information

Engine control module (ECM) incorporates self-diagnosis function.
Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded.
ECM operates in backup mode if sensors fail, to enable vehicle to be driven to workshop.

Accessing

Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC) 1.

Erasing

After the faults have been rectified, trouble codes can be erased by using a Scan tool connected to the data link connector (DLC)

Trouble code identification

OBD-11 code	Fault location	Probable cause
PO,P2,UO	Refer to OBD-11 trouble code tables	–
P1105	Barometric pressure (BARO) sensor, in ECM – circuit malfunction	ECM
P1106	Fuel pressure sensor – implausible signal	Wiring, connections, fuel pressure sensor, ECM
P1107	Fuel pressure sensor – short to ground	Wiring, connections, fuel pressure sensor, ECM
P1108	Fuel pressure sensor- short to positive	Wiring, connections, fuel pressure sensor, ECM
P1146	Mass air flow (MAF) sensor, left cylinder bank – signal error	Wiring, connections, MAF sensor
P1147	Engine coolant temperature (ECT) sensor, left cylinder bank – signal error	Wiring, connections, ECT sensor, ECM
P1148	Intake air temperature (IAT) sensor, left cylinder bank – signal error	Wiring, connections, IAT sensor, ECM
P1149	Fuel pressure sensor, left cylinder bank – signal error	Wiring, connections, vacuum leak, fuel pressure sensor, fuel injection control module
P1162	Throttle valve actuator 1/2 – signal error	Wiring, connections, throttle valve actuator 1/2, ECM
P1163	Oil level sensor – signal error	Wiring, connections, oil level sensor, right cylinder bank -fuel injection control module
P1177	Engine oil sensor module – implausible oil temperature signal	Wiring, connectors, oil quality, oil level, engine oil sensor, ECM
P1183	Cylinder cut-out system, right cylinder bank – Voltage error	Wiring, connections
P1184	Cylinder cut-out system, left cylinder bank – Voltage error	Wiring, connections
P1186	Throttle valve actuator 1/2- signal error	Wiring, connections, throttle valve actuator 1/2, ECM
P1187	Fuel rail pressure (FRP) sensor- malfunction	Wiring, poor connection, fuel pressure regulator control solenoid, fuel rail pressure (FRP) sensor, fuel level low, fuel pressure, high-pressure fuel pump, injector(s)
P1188	3rd piston cut-off solenoid – malfunction	Wiring, connector, 3rd piston cut-off solenoid
P1189	Intake manifold air control system – malfunction	Wiring, connectors, hoses, intake manifold air control valve
P1190	Fuel pressure control solenoid – malfunction	Wiring, connectors, fuel pressure control solenoid
P1192	Engine oil sensor module – malfunction	Wiring, connectors, oil quality, oil level
P1220	Fuel quantity adjuster	Wiring, connections, fuel injection control module
P1221	CAN data bus, TCS – malfunction	Wiring, TCS control module trouble code(s) stored
P1222	Accelerator pedal position (APP) sensor 1 – malfunction	Wiring, APP sensor 1, ECM
P1223	Fuel quantity adjuster position sensor	Wiring, fuel quantity adjuster, ECM
P1234	Accelerator pedal position (APP) sensor 2 – malfunction	Wiring, APP sensor 2, ECM
P1237	Traction control system (TCS)- defective	TCS control module trouble code(s) stored
P1300	Crankshaft position (CKP) sensor- signal error	Wiring, connections, CKP sensor, mechanical fault
P1330	Starter control – malfunction	Wiring, fuse, starter motor, starter motor relay, ECM
P1324	Engine control module (ECM) – knock control malfunction	ECM
P1325	Knock sensor (KS), front – malfunction	Wiring, KS
P1330	Knock sensor (KS), rear- malfunction	Wiring, KS
P1335	Crankshaft position (CKP) sensor – malfunction	Wiring, connector, CKP sensor, ECM
P1354	Crankshaft position (CKP) sensor/camshaft position (CMP) sensor – implausible signal	Wiring, connector, CKP sensor, CMP sensor
P1355	Cylinder cut-out system, right cylinder bank – airflow low	MAF sensor, air intake restricted, cylinder cut-out system solenoid
P1356	Cylinder cut-out system, left cylinder bank – air flow low	MAF sensor, air intake restricted, cylinder cut-out system solenoid
P1365	Glow plug(s)- defective	Wiring, connectors, glow plug(s), ECM
P1367	Glow plug(s)- defective	Wiring, connectors, glow plug(s), ECM
P1369	Glow plug(s)- defective	Wiring, connectors, glow plug(s), ECM
P1380	Cylinder cut-out system – system malfunction	Mechanical fault
P1384	Knock sensor (KS) front, left cylinder bank – implausible signal	Wiring, connections, KS, ECM
P1385	Knock sensor (KS) rear, left cylinder bank- implausible signal	Wiring, connections, KS, ECM
P1386	Fuel injection control module – internal fault	Fuel injection control module – right cylinder bank
P1397	Camshaft position (CMP) sensor – signal error	Wiring, connections, CMP sensor – right cylinder bank, CMP sensor – left cylinder bank
P1401	Exhaust gas recirculation (EGR) position sensor	Wiring, connections, EGR position sensor, ECM
P1402	Exhaust gas recirculation (EGR) solenoid	Wiring, EGR solenoid, ECM
P1403	Exhaust gas recirculation (EGR) system- malfunction	Wiring, connectors, hoses, intake leak, EGR solenoid, MAF sensor
P1404	Exhaust gas recirculation (EGR) system – malfunction	Wiring, connectors, hoses, intake leak, EGR solenoid, MAF sensor
P1420	AIR switching valve – actuator control	Wiring, connectors, AIR switching valve, fuel injection control module – right cylinder bank
P1437	Exhaust gas temperature sensor 1 – malfunction	Wiring, exhaust gas temperature sensor
P1443	Evaporative emissions (EVAP), purge control valve 1/2- electrical fault	Wiring, connections, EVAP purge control valve 1/2, ECM
P1453	AIR switching valve – actuator control	Wiring, connectors, AIR switching valve, fuel injection control module – right cylinder bank
P1463	AIR switching valve – actuator control	Wiring, connectors, AIR switching valve, fuel injection control module – right cylinder bank
P1470	Turbocharger (TC) boost pressure – pressure too low/high	Wiring, connectors, hoses, turbocharger (TC) wastegate regulating valve
P1480	Glow plug warning lamp – malfunction	Wiring, connectors, bulb, instrument panel
P1481	Glow plug(s)- defective	Wiring, connectors, glow plug(s), ECM
P1482	Glow plug control module – output stage	Wiring, connectors, glow plug control module
P1490	Evaporative emissions (EVAP), purge control valve 1/2 – electrical fault	Wiring, connections, EVAP purge control valve 1/2, ECM
P1519	Camshaft timing, right cylinder bank – signal range/performance	Wiring, connections, manifold absolute pressure (MAP) sensor, mechanical fault
P1520	Cruise control master switch – malfunction	Wiring, connectors, data bus, ignition switch control module, ECM
P1522	Camshaft timing, left cylinder bank – signal range/performance	Wiring, connections, manifold absolute pressure (MAP) sensor, mechanical fault
P1525	Camshaft timing control solenoid, right cylinder bank – voltage error	Wiring, connections, camshaft timing control solenoid
P1533	Camshaft timing control solenoid, left cylinder bank – voltage error	Wiring, connections, camshaft timing control solenoid
P1542	Accelerator pedal position (APP) sensor – signal error	Wiring, connectors, APP sensor, fuel injection control module – right cylinder bank, fuel injection control module – left cylinder bank
P1570	Immobilizer system activated – theft detected	Erase fault memory, incorrect/damaged key, immobilizer system malfunction
P1580	Throttle valve actuator 1/2- electrical malfunction	Wiring, connections,throttle valve actuator 1/2, ECM
P1581	Throttle valve actuator 1/2 – electrical malfunction	Wiring, connections,throttle valve actuator 1/2, ECM
P1584	Stop lamp switch – no signal	Wiring, connections, stop lamp switch
P1587	Engine control module (ECM), left cylinder bank – voltage error	Wiring, connections, ECM
P1588	CAN communication line/fuel injection control module 1/2- communication error	Wiring, connections, fuel injection control module 1/2
P1589	Engine control module (ECM) – internal fault	ECM
P1610	Engine control (EC) relay – defective	Wiring, fuse, engine control (EC) relay
P1611	Engine control module (ECM) – internal fault	ECM
P1612	Engine control module (ECM) – supply voltage	Wiring, connector, ignition switch
P1613	Engine control module (ECM) – internal fault	ECM
P1614	Engine control module (ECM) – internal fault	ECM
P1615	Engine control module (ECM) -supply voltage	Wiring, connector, ECM
P1617	Engine control module (ECM) – EEPROM error	ECM
P1622	Fuel shut-off solenoid – defective	Wiring, fuel shut-off solenoid
P1630	Immobilizer control module – malfunction	Wiring, data bus, ignition switch control module, ECM
P1632	Fuel injection control module, left cylinder bank – internal fault	ECM
P1636	Engine coolant blower motor control module – malfunction	Wiring, connectors, engine coolant blower motor, ECM
P1641	CAN communication line/fuel injection control module 1/2- communication error	Wiring, connections, fuel injection control module 1/2
P1661	Injectors – voltage high/low	Wiring, connectors, injectors, ECM
P1662	Injectors – voltage high/low	Wiring, connectors, injectors, ECM
P1663	Fuel pressure control solenoid – defective	Wiring, connectors, fuel pressure control solenoid
P1664	Auxiliary heater control module/ECM – electrical fault	Wiring, auxiliary heater control module, ECM
P1666	Engine control module (ECM) – engine shut-off control	ECM
P1681	CAN data bus, SRS control module – malfunction	Wiring, connectors, SRS control module trouble code(s) stored, SRS control module, ECM
P1698	CAN data bus, AC/emergency shut-off – malfunction	Wiring, connectors, AC control module, ECM
P1999	Warm idle speed, high RPM – malfunction	Wiring, clutch switch, CAN
P3237	Heated oxygen sensor (H02S) 3 – no activity detected	Wiring, connections, H02S, ECM
P3238	Heated oxygen sensor (H02S) 3 – short to ground	Wiring, connections, H02S
P3239	Heated oxygen sensor (H02S) 3 – short to positive	Wiring, connections, H02S
P3245	Heated oxygen sensor (H02S) 3 – short to ground	Wiring, connections, H02S
P3246	Heated oxygen sensor (H02S) 3 – short to positive	Wiring, connections, H02S
P3443	Heated oxygen sensor (H02S) 3- no activity detected	Wiring, connections, H02S, ECM