| Scan code | Fault location | Probable cause |
| PO, P2,UO | Refer to OBO-II trouble code tables | – |
| P1000 | Ignition coil , 2 -primary circuit range/performance | Wiring, connectors, ignition coil 2, ECM |
| P1001 | Ignition coil, 5 -primary circuit high | Wiring, connectors, ignition coil 5, ECM |
| P1002 | Ignition coil, 5 -primary circuit low | Wiring, connectors, ignition coil 5, ECM |
| P1003 | Ignition coil , 5 -primary circuit open | Wiring, connectors, ignition coil 5, ECM |
| P1004 | Ignition coil, 5 -primary circuit range/performance | Wiring, connectors, ignition coil 5, ECM |
| P1013 | Ignition coil, 1 -secondary circuit high | Wiring, connectors, ignition coil 1, spark plug, ECM |
| P1014 | Ignition coil, 1 -secondary circuit low | Wiring, connectors, ignition coil 1, spark plug, ECM |
| P1015 | Ignition coil, 1 -secondary range/performance | Wiring, connectors, ignition coil 1, spark plug, ECM |
| P1016 | Ignition coil, 1 -secondary circuit open | Wiring, connectors, ignition coil 1, spark plug, ECM |
| P1017 | Ignition coil, 4 -secondary circuit high | Wiring, connectors, ignition coil 4, spark plug, ECM |
| P1018 | Ignition coil, 4 -secondary circuit low | Wiring, connectors, ignition coil 4, spark plug, ECM |
| P1019 | Ignition coil, 4 -secondary range/performance | Wiring, connectors, ignition coil 4, spark plug, ECM |
| P1023 | Ignition coil, 3 -secondary range/performance | Wiring, connectors, ignition coil 3, spark plug, ECM |
| P1024 | Ignition coil, 3 -secondary circuit open | Wiring, connectors, ignition coil 3, spark plug, ECM |
| P1025 | Ignition coil, 6 -secondary circuit high | Wiring, connectors, ignition coil 6, spark plug, ECM |
| P1026 | Ignition coil, 6 -secondary circuit low | Wiring, connectors, ignition coil 6, spark plug, ECM |
| P1027 | Ignition coil, 6 -secondary range/performance | Wiring, connectors, ignition coil 6, spark plug, ECM |
| P1028 | Ignition coil, 6 -secondary circuit open | Wiring, connectors, ignition coil 6, spark plug, ECM |
| P1029 | Ignition coil, 2 -secondary circuit high | Wiring, connectors, ignition coil 2, spark plug, ECM |
| P1030 | Ignition coil, 2 -secondary circuit low | Wiring, connectors, ignition coil 2, spark plug, ECM |
| P1031 | Ignition coil, 2 -secondary range/performance | Wiring, connectors, ignition coil 2, spark plug, ECM |
| P1032 | Ignition coil, 2 -secondary circuit open | Wiring, connectors, ignition coil 2, spark plug, ECM |
| P1033 | Ignition coil, 5 -secondary circuit high | Wiring, connectors, ignition coil 5, spark plug, ECM |
| P1034 | Ignition coil, 5 -secondary circuit low | Wiring, connectors, ignition coil 5, spark plug, ECM |
| P1035 | Ignition coil, 5 -secondary range/performance | Wiring, connectors, ignition coil 5, spark plug, ECM |
| P1036 | Ignition coil, 5 -secondary circuit open | Wiring, connectors, ignition coil 5, spark plug, ECM |
| P1045 | Heated oxygen sensor (H02S) 1, bank 1 system too rich | Wiring, connectors, H02S, ECM |
| P1046 | Heated oxygen sensor (H02S) 1, bank 1 system too lean | Wiring, connectors, H02S, ECM |
| P1047 | Heated oxygen sensor (H02S) 1, bank 1 inactive | Wiring, connectors, H02S, ECM |
| P1048 | Heated oxygen sensor (H02S) 1, bank 1range/performance | Wiring, connectors, H02S, ECM |
| P1049 | Heated oxygen sensor (H02S) 2, bank 1 system too rich | Wiring, connectors, H02S, ECM |
| P1050 | Heated oxygen sensor (H02S) 2, bank 1 system too lean | Wiring, connectors, H02S, ECM |
| P1051 | Heated oxygen sensor (H02S) 2, bank 1 inactive | Wiring, connectors, H02S, ECM |
| P1052 | Heated oxygen sensor (H02S) 2, bank 1range/performance | Wiring, connectors, H02S, ECM |
| P1053 | Heated oxygen sensor (H02S) 1, bank 1 circuithigh | Wiring, connectors, H02S, ECM |
| P1057 | Heated oxygen sensor (H02S) 2, bank 1 circuit high | Wiring, connectors, H02S, ECM |
| P1065 | AIR pump relay -circuit high | Wiring, connectors, AIR pump relay, ECM |
| P1066 | AIR pump relay -circuit low | Wiring, connectors, AIR pump relay, ECM |
| P1067 | AIR pump relay -circuit open | Wiring, connectors, AIR pump relay, ECM |
| P1069 | AIR switching valve -circuit malfunction | Wiring, connectors, AIR switching valve, ECM |
| P1070 | AIR switching valve -circuit malfunction | Wiring, connectors, AIR switching valve, ECM |
| P1071 | AIR switching valve -circuit malfunction | Wiring, connectors, AIR switching valve, ECM |
| P1073 | Intake manifold air control valve -circuit high | Wiring, connectors, intake manifold air control valve, ECM |
| P1074 | Intake manifold air control valve -circuit low | Wiring, connectors, intake manifold air control valve, ECM |
| P1075 | Intake manifold air control valve -circuit open | Wiring, connectors, intake manifold air control valve, ECM |
| P1077 | EVAP canister purge system -performance | Vacuum leak, EVAP system hoses, EVAP solenoid, ECM |
| P1078 | EVAP canister purge system -performance | Vacuum leak, EVAP system hoses, EVAP solenoid, ECM |
| P1081 | EVAP canister purge system -leak | Vacuum leak, EVAP system hoses, EVAP solenoid, EVAP monitor circuit |
| P1085 | EVAP canister purge system -leak | Vacuum leak, EVAP system hoses, EVAP solenoid, EVAP monitor circuit, filler cap/pipe |
| P1089 | EVAP canister purge system -leak | Vacuum leak, EVAP system hoses, EVAP solenoid, EVAP monitor circuit |
| P1097 | EVAP canister purge system -performance | Vacuum leak, EVAP system hoses, EVAP solenoid, ECM |
| P1101 | Ambient air temperature sensor -circuit high | Wiring, connectors, ambient air temperature sensor, BCM |
| P1105 | Barometric pressure (BARO) sensor, in ECMcircuit malfunction | ECM |
| P1105 0 | Main relay -control circuit high | Wiring, connections, main relay, ECM |
| P1106 | Main relay -control circuit low | Wiring, connections, main relay, ECM |
| P1108 | Main relay -control circuit open | Wiring, connections, main relay, ECM |
| P1117 | ECM -internal fault | ECM |
| P1118 | ECM -internal fault | ECM |
| P1119 | ECM -internal fault | ECM |
| P1185 | Intake manifold air control valve -circuit high | Wiring, connectors, intake manifold air control valve, ECM |
| P1186 | Intake manifold air control valve -circuit high | Wiring, connectors, intake manifold air control valve, 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) |
| P1187 0 | Intake manifold air control valve -circuit high | Wiring, connectors, intake manifold air control valve, ECM |
| P1188 | 3rd piston cut-off solenoid -malfunction | Wiring, connector, 3rd piston cut-off solenoid |
| P1190 | Fuel pressure control solenoid -malfunction | Wiring, connectors, fuel pressure control solenoid |
| P1192 | Engine oil sehsor module -malfunction | Wiring, connectors, oil quality, oil level |
| P1197 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 1, bank 2range/performance | Wiring, connectors, mechanical fault, CKP, CMP 1 bank 2, ECM |
| P1198 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 1, bank 2 range/performance | Wiring, connectors, mechanical fault, CKP, CMP 1 bank 2, ECM |
| P1199 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 1, bank 2 range/performance | Wiring, connectors, mechanical fault, CKP, CMP 1 bank 2, ECM |
| P1200 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 1, bank 2 range/performance | Wiring, connectors, mechanical fault, CKP, CMP 1 bank 2, ECM |
| P1201 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 2, bank 2range/performance | Wiring, connectors, mechanical fault, CKP, CMP 2 bank 2, ECM |
| P1202 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 2, bank 2range/performance | Wiring, connectors, mechanical fault, CKP, CMP 2 bank 2, ECM |
| P1203 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 2, bank 2 range/performance | Wiring, connectors, mechanical fault, CKP, CMP 2 bank 2, ECM |
| P1204 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 2, bank 2range/performance | Wiring, connectors, mechanical fault, CKP, CMP 2 bank 2, ECM |
| P1205 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 1, bank 1 range/performance | Wiring, connectors, mechanical fault, CKP, CMP 1 bank 1, ECM |
| P1206 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 1, bank 1range/performance | Wiring, connectors, mechanical fault, CKP, CMP 1 bank 1, ECM |
| P1207 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 1, bank 1 range/performance | Wiring, connectors, mechanical fault, CKP, CMP 1 bank 1, ECM |
| P1208 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 1, bank 1 range/performance | Wiring, connectors, mechanical fault, CKP, CMP 1 bank 1, ECM |
| P1209 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 2, bank 1range/performance | Wiring, connectors, mechanical fault, CKP, CMP 2 bank 1, ECM |
| P1210 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 2, bank 1 range/performance | Wiring, connectors, mechanical fault, CKP, CMP 2 bank 1, ECM |
| P1211 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 2, bank 1 range/performance | Wiring, connectors, mechanical fault, CKP, CMP 2 bank 1, ECM |
| P1212 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor 2, bank 1range/performance | Wiring, connectors, mechanical fault, CKP, CMP 2 bank 1, ECM |
| P1221 | CAN data bus, rcs -malfunction | Wiring, rcs control module trouble code(s) stored |
| P1222 | Accelerator pedal position (APP) sensor 1 malfunction | Wiring, APP sensor 1, ECM |
| P1234 | Accelerator pedal position (APP) sensor 2 malfunction | Wiring, APP sensor 2, ECM |
| P1305 | Power assisted steering -control circuit high | Wiring, connectors, power assisted steering -control valve, ECM |
| P1306 | Power assisted steering -control circuit low | Wiring, connectors, power assisted steering -control valve, ECM |
| P1307 | Power assisted steering -control circuit malfunction | Wiring, connectors, power assisted steering -control valve, ECM |
| P1313 | Electronic throttle system -throttle valve movement restricted | Wiring, connectors, throttle valve motor, throttle valve sticking, mechanical fault |
| P1314 | Electronic throttle system -throttle valve movement restricted | Wiring, connectors, throttle valve motor, throttle valve sticking, mechanical fault |
| P1315 | Electronic throttle system -throttle valve movement restricted | Wiring, connectors, throttle valve motor, throttle valve sticking, mechanical fault |
| P1330 | Starter control -malfunction | Wiring, fuse, starter motor, starter motor relay, ECM |
| P1335 | Crankshaft position (CKP) sensor malfunction | Wiring, connector, CKP sensor, ECM |
| P1345 | Mass air flow (MAF) sensor range/performance | Wiring, connectors, intake air flow, MAF sensor,ECM |
| P1346 | Mass air flow (MAF) sensor range/performance | Wiring, connectors, intake air flow, MAF sensor,ECM |
| P1347 | Mass air flow (MAF) sensor range/performance | Wiring, connectors, intake air flow, MAF sensor,ECM |
| P1349 | Mass air flow (MAF) sensor/throttle position sensor (TPS) -correlation | Wiring, connectors, intake air flow, MAF sensor,TPS, ECM |
| P1350 | Mass air flow (MAF) sensor range/performance | Wiring, connectors, intake air flow, MAF sensor,ECM |
| P1351 | Mass air flow (MAF) sensor -circuit performance | Wiring, connectors, intake air flow, MAF sensor,ECM |
| P1352 | Mass air flow (MAF) sensor -circuit performance | Wiring, connectors, intake air flow, MAF sensor,ECM |
| P1354 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -implausible signal | Wiring, connector, CKP sensor, CMP sensor |
| P1360 | Oxygen sensors, downstream -signal mismatch | Wiring, connectors swapped, oxygen sensor(s),ECM |
| P1389 | AIR system -flow excessively high or low | Wiring, connections, vacuum lines, electric AIRpump/control valve/relay, AIR switching valve/shutoff solenoid(s), ECM |
| P1390 | AIR system -flow excessively high or low | Wiring, connections, vacuum lines, electric AIR pump/control valve/relay, AIR switching valve/shutoff solenoid(s), ECM |
| P1392 | AIR system -flow excessively high or low | Wiring, connections, vacuum lines, electric AIR pump/control valve/relay, AIR switching valve/shutoff solenoid(s), ECM |
| P1403 | Exhaust gas recirculation (EGR) system -malfunction | Wiring, connectors, hoses, intake leak, EGR solenoid, MAF sensor |
| P1436 | Exhaust gas temperature sensor 1, bank 1 voltage range/performance | Wiring, connectors, exhaust gas temperature sensor, ECM |
| P1437 | Exhaust gas temperature sensor 1, bank 2 voltage range/performance | Wiring, connectors, exhaust gas temperature sensor, ECM |
| P1461 | Engine coolant temperature (ECT) sensor implausible signal | Wiring, connections, ECT sensor, ECM |
| P1462 | Engine coolant temperature (ECT) sensorimplausible signal | Wiring, connections, ECT sensor, ECM |
| P1463 | Engine coolant temperature (ECT) sensorimplausible signal | Wiring, connections, ECT sensor, ECM |
| P1464 | Engine coolant temperature (ECT) sensor implausible signal | Wiring, connections, ECT sensor, ECM |
| P1470 | Turbocharger (TC) boost pressure pressure too low/high | Wiring, connectors, hoses, turbocharger (TC) wastegate regulating valve, ECM |
| P1480 | Glow plug control module -voltage supply fault | Wiring, connectors, glow plug control module,ECM |
| P1481 | Glow plug(s) -defective | Wiring, connectors, glow plug(s), ECM |
| P1482 | Glow plug control module -output stage | Wiring, connectors, glow plug control module, ECM |
| P1520 | Cruise control master switch -malfunction | Wiring, connectors, data bus, ignition switchcontrol module, ECM |
| P1599 | Ambient air temperature sensor -low input | Wiring, connections, ambient air temperature sensor, BCM |
| P1600 | Ambient air temperature sensor -high input | Wiring, connections, ambient air temperature sensor, BCM |
| P1610 | Engine control relay -defective | Wiring, fuse, engine control relay, ECM |
| P1611 | Engine control module (ECM) -5 volt output erratic | Wiring, poor connection, APP sensor, engine oil sensor, MAF sensor, 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) -EPROM error | ECM |
| P1630 | Immobilizer control module -malfunction | Wiring, data bus, ignition switch control module,ECM |
| P1661 | Injectors -voltage low/high | Wiring, connectors, injectors, ECM |
| P1663 | Fuel pressure control solenoid -defective | Wiring, connectors, fuel pressure control solenoid |
| 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 |
| P1901 | Engine oil pressure sensor range/performance | Wiring, connections, engine oil pressure sensor,ECM |
| P1902 | Engine oil pressure sensor range/performance | Wiring, connections, engine oil pressure sensor, ECM |
| P1909 | Manifold absolute pressure (MAP) sensor circuit high | Wiring, connections, MAP sensor, ECM |
| P1910 | Manifold absolute pressure (MAP) sensor circuit low | Wiring, connections, MAP sensor, ECM |
| P1913 | Manifold absolute pressure (MAP) sensor range/performance | Wiring, connections, MAP sensor, ECM |
| P1914 | Manifold absolute pressure (MAP) sensor range/performance | Wiring, connections, MAP sensor, ECM |
| P1915 | Manifold absolute pressure (MAP) sensor range/performance | Wiring, connections, MAP sensor, ECM |
| P1916 | Manifold absolute pressure (MAP) sensor range/performance | Wiring, connections, MAP sensor, ECM |
| P3050 | Oxygen sensor -circuit malfunction | Wiring, connectors, oxygen sensor(s), ECM |
| P3080 | Engine oil pressure sensor -circuit malfunction | Wiring, connectors, engine oil pressure sensor, ECM |
| P3097 | Intake air temperature (IAT) sensor -value too high | Wiring, connectors, IAT sensor, ECM |
| P3098 | Intake air temperature (IAT) sensor -value too low | Wiring, connectors, IAT sensor, ECM |
| P3099 | Intake air temperature (IAT) sensor -value too low | Wiring, connectors, IAT sensor, ECM |
| P3121 | Catalyst temperature sensor -circuit malfunction | Wiring, connectors, oxygen sensor(s), ECM |
| P3131 | Oxygen sensor 1, bank 1 -circuit malfunction | Wiring, connectors, oxygen sensor, ECM |
| P3133 | Oxygen sensor -supply voltage low | Wiring, connectors, oxygen sensor(s), ECM |
| P3134 | Oxygen sensor -supply voltage low | Wiring, connectors, oxygen sensor(s), ECM |
| P3135 | Particulate filter -implausible signal | Exhaust leak/blockage, exhaust pressure sensor, hose/pipe blockedlleaking, particulate filter |
| P3136 | Particulate filter -signal high | Exhaust leak/blockage, exhaust pressure sensor, hose/pipe blockedlleaking, particulate filter |
| P3137 | Particulate filter -signal low | Exhaust leak/blockage, exhaust pressure sensor, hose/pipe blockedlleaking, particulate filter |
| P3139 | Particulate filter -implausible signal | Exhaust leak/blockage, exhaust pressure sensor,hose/pipe blockedlleaking, particulate filter |
| P3154 | Intake air temperature (IAT) sensor -signal high | Wiring, connectors, IAT sensor, ECM |
| P3155 | Intake air temperature (IAT) sensor -signal low | Wiring, connectors, IAT sensor, ECM |