| OBD-11 code | Fault location | Probable cause |
| PO, P2, UO | Refer to OBD-11 trouble code tables | – |
| P1105 | Manifold absolute pressure (MAP) sensor, TC
system – leak detected | Intake leak, hose(s) |
| P1105 | Manifold absolute pressure (MAP) sensor, TC
system – performance problem | TC system – mechanical fault, air leak between throttle body – TC, MAP sensor- TC system, exhaust blockage |
| P1106 | Manifold absolute pressure (MAP) sensor, TC
system – range/performance problem | MAP sensor – TC system |
| P1107 | Manifold absolute pressure (MAP) sensor, TC
system – open circuit/short to ground | Wiring open circuit/short to ground, ECM |
| P1108 | Manifold absolute pressure (MAP) sensor, TC system – short to positive
| Wiring short to positive, ECM |
| P1109 | Throttle actuator – incorrect signal | Wiring, connections, throttle body dirty/damaged, throttle actuator |
| P1110 | Turbocharger (TC) bypass valve – range/performance problem | Hose(s), TC bypass solenoid, TC bypass valve |
| P1122 | Accelerator pedal position (APP) sensor – no signal | Wiring, connections, APP sensor |
| P1125 | Throttle actuator – incorrect signal | Wiring, connections, throttle actuator |
| P1126 | Throttle actuator – incorrect signal | Wiring, connections, throttle body dirty/damaged, throttle actuator |
| P1131 | Heated oxygen sensor (H02S) 1, bank 1 – malfunction | Wiring, H02S, ECM |
| P1132 | Heated oxygen sensor (H02S) 1, bank 1 – malfunction | Wiring, H02S, ECM |
| P1133 | Heated oxygen sensor (H02S) 1, bank 1 – voltage low | Wiring, H02S |
| P1135 | Heated oxygen sensor (H02S) 1, bank 1 – heater low input | Wiring, fuel pump relay, H02S, ECM |
| P1136 | Heated oxygen sensor (H02S) 1, bank 1 – heater high input | Wiring, fuel pump relay, H02S, ECM |
| P1137 | Heated oxygen sensor (H02S) 2, bank 1 – voltage low | Wiring, H02S |
| P1141 | Heated oxygen sensor (H02S) 2, bank 1 – heater low input | Wiring, fuel pump relay, H02S, ECM |
| P1142 | Heated oxygen sensor (H02S) 2, bank 1 – heater high input | Wiring, fuel pump relay, H02S, ECM |
| P1171 | Short term fuel trim (FT), max. value – lean mixture | Fuel pressure, injector(s), intake system, mass air flow (MAF) sensor |
| P1172 | Short term fuel trim (FT), min. value – rich mixture | Fuel pressure, injector(s), evaporative emission (EVAP) canister purge valve |
| P1181 | Long term fuel trim (FT), max. value – lean mixture | Fuel pressure, injector(s), intake system, mass air flow (MAF) sensor |
| P1182 | Long term fuel trim (FT), min. value – rich mixture | Fuel pressure, injector(s), evaporative emission (EVAP) canister purge valve |
| P1230 | Throttle position (TP) sensor 1 & 2 – range/performance problem | Wiring, connectors, throttle control unit, ECM |
| P1231 | Throttle position (TP) sensor 1 & 2 – range/performance problem | Wiring, connectors, throttle control unit, ECM |
| P1240 | Throttle position motor – short circuit | Wiring, throttle control unit, ECM |
| P1251 | Throttle position motor – fully closed signal | Wiring, mechanical fault, throttle control unit, ECM |
| P1252 | Throttle position motor – fully open signal/
no current | Wiring, throttle control unit, ECM |
| P1253 | Throttle position motor – fully open signal during cranking | Wiring, mechanical fault, throttle control unit, ECM |
| P1260 | Throttle return spring – weak spring force | Mechanical fault, throttle control unit |
| P1261 | Throttle valve – tight/sticking | Mechanical fault, throttle control unit, ECM |
| P1263 | Throttle valve – moved manually while engine running | Operator error, throttle control unit, mechanical fault |
| P1264 | Throttle valve open – accelerator released | Throttle control unit, mechanical fault |
| P1300 | Random/multiple cylinder(s) – misfire detected | Mechanical fault, wiring, ignition/fuel system, mass air flow (MAF) sensor, fuel pump relay, manifold absolute pressure (MAP) sensor, intake leak |
| P1301 | Cylinder 1 – misfire detected | Mechanical fault, ignition/fuel system, injector |
| P1302 | Cylinder 2 – misfire detected | Mechanical fault, ignition/fuel system, injector |
| P1303 | Cylinder 3 – misfire detected | Mechanical fault, ignition/fuel system, injector |
| P1304 | Cylinder 4 – misfire detected | Mechanical fault, ignition/fuel system, injector |
| P1310 | Ignition coils, bank 1 – no supply voltage | Wiring, ignition coil assembly, ECM |
| P1312 | Ignition coil – knock detection, cylinder 1 & 2 | Wiring open circuit/short to positive, ignition coil assembly, ECM |
| P1315 | Ignition diagnostic module – malfunction | Wiring, ignition diagnostic module, ECM |
| P1320 | Ignition coils, bank 2 – no supply voltage | Wiring, ignition coil assembly, ECM |
| P1334 | Ignition coil – knock detection, cylinder 3 & 4 | Wiring open circuit/short to positive, ignition coil assembly, ECM |
| P1340 | Ignition diagnostic module – malfunction | Wiring, ignition diagnostic module, ECM |
| P1341 | Cylinder 1 – misfire detected | Spark plug, wiring, ignition coil, ignition diagnostic module |
| P1342 | Cylinder 2 – misfire detected | Spark plug, wiring, ignition coil, ignition diagnostic module |
| P1343 | Cylinder 3 – misfire detected | Spark plug, wiring, ignition coil, ignition diagnostic module |
| P1344 | Cylinder 4 – misfire detected | Spark plug, wiring, ignition coil, ignition diagnostic module |
| P1350 | Ignition diagnostic module, random/multiple cylinder(s) – no signal | Wiring, ignition diagnostic module, ECM |
| P1351 | Ignition diagnostic module, cylinder 1 .:. no signal | Wiring, ignition diagnostic module, ECM |
| P1352 | Ignition diagnostic module, cylinder 2 – no signal | Wiring, ignition diagnostic module, ECM |
| P1353 | Ignition diagnostic module, cylinder 3 – no signal | Wiring, ignition diagnostic module, ECM |
| P1354 | Ignition diagnostic module, cylinder 4 – no signal | Wiring, ignition diagnostic module, ECM |
| P1390 | Misfire detected, random – fuel level low | Wiring, connectors, injector(s), fuel pump relay, fuel pressure, mass air flow (MAF) sensor, intake leak, fuel level |
| P1391 | Cylinder 1, misfire detected – fuel level low | Wiring, connectors, injector, fuel level |
| P1392 | Cylinder 2, misfire detected – fuel level low | Wiring, connectors, injector, fuel level |
| P1393 | Cylinder 3, misfire detected – fuel level low | Wiring, connectors, injector, fuel level |
| P1394 | Cylinder 4, misfire detected – fuel level low | Wiring, connectors, injector, fuel level |
| P1395 | Cylinder 5, misfire detected – fuellevel low | Wiring, connectors, injector, fuel level |
| P1396 | Cylinder 6, misfire detected – fuel level low | Wiring, connectors, injector, fuel level |
| P1413 | Secondary air injection (AIR) pump relay – open circuit/short to ground | Wiring open circuit/short to ground, AIR
pump relay |
| P1414 | Secondary air injection (AIR) pump relay – short to positive | Wiring short to positive, AIR pump relay |
| P1416 | Fuel system/misfire detected -fuel level low | Ignition/fuel system, injector(s), fuel level |
| P1441 | Evaporative emission (EVAP) canister purge valve/fuel tank level sensor – malfunction | Wiring, connectors, EVAP canister purge valve, fuel tank level sensor, ECM |
| P1442 | Evaporative emission (EVAP) system/fuel tank level sensor – small leak detected/malfunction | Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve, wiring, fuel tank level sensor |
| P1444 | Evaporative emission (EVAP) system – open circuit/short to ground | Wiring open circuit/short to ground, connectors, EVAP canister purge valve |
| P1445 | Evaporative emission (EVAP) system – open circuit/short to positive | Wiring open circuit/short to positive, connectors, EVAP canister purge valve |
| P1451 | Evaporative emission (EVAP) pressure sensor, in fuel tank – range/performance problem | Wiring, connectors, EVAP pressure sensor |
| P1452 | Evaporative emission (EVAP) pressure sensor, in fuel tank – signal too low when depressurized | Wiring, EVAP canister purge valve, EVAP
system leak, EVAP pressure sensor |
| P1453 | Evaporative emission (EVAP) pressure sensor, in fuel tank – signal too high when depressurized | Wiring, EVAP canister purge valve, hose(s), EVAP pressure s nsor |
| P1455 | Evaporative emission (EVAP) pressure sensor/fuel tank level sensor, in fuel tank – large leak detected/malfunction | Hose connection(s), wiring, EVAP pressure sensor, fuel tank level sensor |
| P1456 | Evaporative emission (EVAP) – small leak/fuel tank level sensor, in fuel tank – malfunction | Loose gas cap, wiring, connections, fuel tank level sensor |
| P1460 | Immobilizer activated – incorrectly programmed/not programmed | Trouble code{s) stored in other system(s), ECM/instrumentation control module/ ignition key not matched to immobilizer control module, immobilizer control module |
| P1491 | Evaporative emission (EVAP) pressure sensor/fuel tank level sensor, in fuel tank – range/performanceproblem/malfunction | Wiring, connector(s), EVAP pressure sensor, fuel tank level sensor |
| P1492 | Evaporative emission (EVAP) pressure sensor/fuel tank level sensor, in fuel tank – signal too low when depressurized/malfunction | Wiring, connector(s), EVAP pressure sensor, fuel tank level sensor |
| P1493 | Evaporative emission (EVAP) pressure sensor/fuel tank level sensor, in fuel tank – signal too high when depressurized/ malfunction | Wiring, connector(s), EVAP pressure sensor, fuel tank level sensor |
| P1500 | Battery voltage too low/high | Wiring, alternator, battery |
| P1523 | Throttle actuator control (TAC) system- range/performance problem | Wiring, throttle motor, TP sensor, ECM |
| P1530 | Accelerator pedal position (APP) sensor
1 & 2 – range/performance problem | Wiring, throttle control unit, ECM |
| P1531 | Accelerator pedal position (APP) sensor 1 & 2 – adapted value out of range
| Wiring, throttle control unit, ECM |
| P1532 | Accelerator pedal position (APP) sensor
1 & 2 – short circuit | Wiring, throttle control unit, ECM |
| P1549 | Turbocharger (TC) system – malfunction | Mechanical fault, hose(s), TC wastegate regulating valve |
| P1551 | Throttle valve adaptation – mechanical stop not adapted | Mechanical fault, wiring, throttle position sensor (TPS) |
| P1576 | Brake pedal position (BPP) switch – open circuit/short to positive | Wiring open circuit/short to positive, BPP
switch |
| P1577 | Brake pedal position (BPP) switch – short to ground | Wiring short to ground, BPP switch |
| P1601 | Engine control module (ECM) – defective | ECM |
| P1602 | Engine control module (ECM) – defective | ECM |
| P1603 | Engine control module (ECM) – defective | ECM |
| P1604 | Engine control module (ECM) – defective | ECM |
| P1605 | Engine control module (ECM) – defective | ECM |
| P1606 | Engine control module (ECM) – defective | ECM |
| P1607 | Engine control module (ECM) – defective | ECM |
| P1608 | Engine control module (ECM) – defective | ECM |
| P1609 | Engine control module (ECM) – defective | ECM |
| P160A | Invalid ECM program | ECM, immobilizer |
| P1610 | Engine control module (ECM) – defective | ECM |
| P1611 | Engine control module (ECM) – defective | ECM |
| P1611 0 | Malfunction indicator lamp (MIL) – short to ground | Wiring short to ground, TCM trouble code(s)
stored |
| P1613 | Engine control module (ECM) – defective | ECM |
| P1614 | Engine control module (ECM) – defective | ECM |
| P1621 | Engine control module (ECM) – defective | ECM |
| P1622 | CAN data bus, instrumentation control module | Wiring |
| P1623 | CAN data bus, TCM | Wiring |
| P1624 | CAN data bus, TCM | TCM trouble code(s) stored |
| P1625 | CAN data bus, TCS/ABS | Wiring |
| P1629 | Invalid ECM program | ECM, immobilizer |
| P1631 | Engine control module (ECM) – defective | ECM |
| P1632 | Engine control module (ECM) – defective | ECM |
| P1633 | Engine control module (ECM) – defective | ECM |
| P1640 | Engine control relay – no voltage to ECM pin 1 | Wiring, connectors, engine control relay |
| P1640 0 | Immobilizer code – not programmed | Code must be programmed into multifunction control module 2 after replacing ECM, instrument panel, multifunction control module 2 |
| P1641 | Fuel pump relay – no voltage to fuel pump/oxygen sensor heater | Wiring, connectors, fuel pump relay |
| P1641 D | Immobilizer code – incorrect | Multifunction control module 2 incorrectly coded |
| P1648 | Invalid ECM program | ECM, immobilizer |
| P1652· | Engine control relay – open circuit/short to ground | Wiring open circuit/short to ground, connectors, engine control relay, ECM |
| P1653 | Engine control relay – short to positive | Wiring short to positive, connectors, engine control relay, ECM |
| P1654 | Fuel pump relay – open circuit/short to ground | Wiring open circuit/short to ground, connectors, fuel pump relay |
| P1655 | Fuel pump relay – short to positive | Wiring short to positive, connectors, fuel pump relay |
| P1656 | AIC relay – open circuit/short to ground | Wiring open circuit/short to ground, connectors, AIC relay |
| P1657 | AIC relay – short to positive | Wiring short to positive, connectors, AIC
·relay |
| P1658 | Turbocharger (TC) bypass valve – open circuiUshort to ground | Wiring open circuit/short to ground, connectors, TC bypass valve |
| P1659 | Turbocharger (TC) bypass valve – short to positive | Wiring short to positive, connectors, TC
bypass valve |
| P1662 | Turbocharger (TC) wastegate regulating valve – open circuit/short to ground | Wiring open circuit/short to ground, connectors, TC wastegate regulating valve |
| P1663 | Turbocharger (TC) wastegate regulating valve – short to positive | Wiring short to positive, connectors, TC
wastegate regulating valve |
| P1670 | Throttle actuator limp-home relay – open circuit/short to ground | Wiring open circuit/short to ground, connectors, throttle actuator limp-home relay |
| P1671 | Throttle actuator limp-home relay – short to positive | Wiring short to positive, connectors, throttle actuator limp-home relay |
| P1676 | Injector circuits- open circuit/short to ground/positive | Wiring, fuse, injector(s), ECM |
| P1677 | Invalid ECM program | ECM, immobilizer |
| P1678 | Invalid ECM program | ECM, immobilizer |
| P1679 | Invalid ECM program | ECM, immobilizer |
| P1682 | Engine control (EC) relay – contacts stuck open | Wiring, EC relay, ECM |
| P1901 f) | CAN data bus, multifunction control module 1 | Wiring |
| P1902 D | CAN data bus, multifunction control module 2 | Wiring |
| P1908 | CAN data bus, instrument panel | Wiring |
| P1921 | CAN data bus, ECM | Wiring |
| P1923 | CAN data bus, TCM | Wiring |
| P1925 | CAN data bus, TCS/ABS | Wiring |
