| OBD-11 code | Fault location | Probable cause |
| PO, P2, UO | Refer to 080-11 trouble code tables | – |
| P1000 | System readiness test not complete | – |
| P1001 | Engine running system self-test not complete | – |
| P1100 | Mass air flow (MAF) sensor – intermittent signal | Wiring, MAF sensor |
| P1101 | Mass air flow (MAF) sensor – signal out of range | Wiring, MAF sensor |
| P1104 | Mass air flow (MAF) sensor – ground circuit malfunction | Wiring, MAF sensor |
| P1107 | Manifold absolute pressure (MAP) sensor – signal voltage low | Wiring, MAP sensor |
| P1108 | Manifold absolute pressure (MAP) sensor – signal voltage high | Wiring, MAP sensor |
| P1111 | OBD checks complete since last memory clear | – |
| P1112 | Intake air temperature (IAT) sensor- intermittent signal | Wiring, IAT sensor |
| P1116 | Engine coolant temperature (ECT) sensor – signal out of range | Wiring, ECT sensor |
| P1117 | Engine coolant temperature (ECT) sensor- intermittent signal | Wiring, ECT sensor |
| P1121 | Throttle position (TP) sensor/mass air flow
(MAF) sensor – implausible signal | Wiring, TP sensor |
| P1122 | Accelerator pedal position (APP) sensor 1 – signal voltage low | Wiring, APP sensor |
| P1123 | Accelerator pedal position (APP) sensor 1 – signal voltage high | Wiring, APP sensor |
| P1124 | Throttle position (TP) sensor – signal out of range | Wiring, TP sensor |
| P1127 | Heated oxygen sensor (H02S) 2 (downstream), bank 1 -exhaust not hot enough for self-test | Engine not at operating temperature, exhaust leak |
| P1128 | Heated oxygen sensors (H02S) 1 (upstream), bank 1/2 | Wiring, H02S 1 (upstream) swapped banks |
| P1129 | Heated oxygen sensors (H02S) 2 (downstream), bank 1/2 | Wiring, H02S 2 (downstream) swapped banks |
| P1130 | Heated oxygen sensors (H02S) 1 (upstream), bank 1 – slow response, adaptive fuel at limit | Wiring, H02S, intake system leak, exhaust leak, contaminated fuel, ECM |
| P1131 | Heated oxygen sensors (H02S) 1 (upstream), bank 1 – slow response, system lean | Wiring, H02S, intake system leak, exhaust leak, contaminated fuel, ECM |
| P1136 | Engine control module (ECM) cooling fan – malfunction | Wiring, ECM cooling fan failure, ECM |
| P1146 | Alternator – charge circuit low | Wiring, alternator voltage regulator, alternator |
| P1215 | Accelerator pedal position (APP) sensor 2 – signal voltage low | Wiring, APP sensor |
| P1216 | Accelerator pedal position (APP) sensor 2 – signal voltage high | Wiring, APP sensor |
| P1224 | Throttle control position – malfunction | Wiring, TP sensor, throttle motor relay, throttle motor, throttle body |
| P1229 | Throttle motor – circuit malfunction | Wiring, throttle motor relay, throttle motor, throttle body |
| P1233 | Fuel pump (FP) – circuit malfunction | Wiring, FP, ECM |
| P1233 D | Fuel pump (FP) 2 – drive circuit malfunction | Wiring, FP 2, ECM |
| P1234 | Fuel pump (FP) control module – control module disabled or off line | Wiring, FP control module, ECM |
| P1236 | Fuel pump (FP) not responding to ECM
commands | Wiring, FP control module |
| P1240 | Sensor power supply – circuit malfunction | Wiring, APP sensor, MAP sensor, TP sensor, fuel tank pressure sensor(s) |
| P1241 | Sensor power supply – low input | Wiring open/short to ground, APP sensor, MAP sensor, TP sensor, fuel tank pressure sensor(s) |
| P1242 | Sensor power supply – high input | Wiring open/short to positive, APP sensor, MAP sensor, TP sensor, fuel tank pressure sensor(s) |
| P1243 | Sensor ground circuit – malfunction | Wiring, APP sensor, MAP sensor, TP sensor, fuel tank pressure sensor(s) |
| P1244 | Alternator – charge circuit high | Wiring, alternator voltage regulator, alternator |
| P1245 | Engine cranking signal – voltage low | Wiring, starter motor relay, ignition switch |
| P1246 | Engine cranking signal – voltage high | Wiring, starter motor relay, ignition switch |
| P1250 | Throttle valve return spring – malfunction | Throttle body |
| P1251 | Throttle motor relay – malfunction | Wiring, throttle motor relay |
| P1254 | Throttle limp-home spring – malfunction | Throttle body |
| P1260 | Vehicle immobilized | Invalid ignition key, immobilizer system fault |
| P1313 | Misfire/catalyst damage – bank 1 | Engine mechanical fault, wiring, ignition/fuel system, injector(s), MAP/TP/ECT/IAT sensor, EVAP system, ECM |
| P1314 | Misfire/catalyst damage – bank 2 | Engine mechanical fault, wiring, ignition/fuel system, injector(s), MAP/TP/ECTIIAT sensor, EVAP system, ECM |
| P1316 | Misfire | Wiring, engine mechanical fault, other trouble code(s) stored, ignition/fuel system, MAPITP/ECT/IAT sensor, injector(s), ECM |
| P1338 | Fuel pump (FP) -feedback circuit malfunction | Wiring, FP control module |
| P1339 | Fuel pump (FP) 2 – circuit malfunction | Wiring, FP 2, ECM |
| P1340 | Camshaft position (CMP) sensor 2, bank 2 – circuit malfunction | Wiring, air gap, metal particles, damaged rotor, insecure sensor, CMP sensor |
| P1341 | Camshaft position (CMP) sensor 2, bank 2 – circuit range/performance | Wiring, air gap, metal particles, damaged rotor, insecure sensor, CMP sensor |
| P1344 | Accelerator pedal position (APP) sensor 1/2- range/performance problem | Wiring, APP sensor(s) |
| P1367 | Ignition amplifier, bank 1 – malfunction | Wiring, ignition amplifier/coils |
| P1368 | Ignition amplifier, bank 2 – malfunction | Wiring, ignition amplifier/coils |
| P1384 | Camshaft position (CMP) actuator, bank 1 – malfunction | Wiring, oil contamination, oil pressure low/high, mechanical fault, CMP actuator |
| P1396 | Camshaft position (CMP) actuator, bank 2 – malfunction | Wiring, oil contamination, oil pressure low/high, mechanical fault, CMP actuator |
| P1410 | Intake air flap control actuator – circuit malfunction | Wiring, intake air flap control actuator, ECM |
| P1474 | Intercooler coolant pump relay – malfunction | Wiring, intercooler coolant pump relay, ECM |
| P1474 0 | Intercooler coolant pump – malfunction | Wiring, intercooler coolant pump |
| P1516 | Park/neutral position (PNP) switch, gear change neutral/drive – malfunction | Wiring, selector cable adjustment, PNP
switch, TR sensor |
| P1517 | Park/neutral position (PNP) switch, cranking – malfunction | Wiring, selector cable adjustment, PNP
switch, TR sensor |
| P1532 | Intake manifold air control solenoid 2 (lower flap) – circuit malfunction | Wiring, intake manifold air control solenoid |
| P1549 | Intake manifold air control solenoid 1 (upper flap)- circuit malfunction | Wiring, intake manifold air control solenoid |
| P1571 | Brake pedal position (BPP) switch – circuit malfunction | Wiring, BPP switch |
| P1573 | CAN data bus, throttle position (TP) – message error | Wiring, TP sensor |
| P1582 | Engine control module (ECM) – data stored | Wiring, inertia switch activated/defective, throttle in limp-home mode |
| P1601 | Incorrect ECMITCM fitted to vehicle | ECMITCM coding, ECM, TCM |
| P1603 | Transmission control module (TCM) – EEPROM malfunction | Battery disconnected with ignition ON, wiring, TCM |
| P1606 | Engine control (EC) relay – malfunction | Wiring, EC relay |
| P1609 | Engine control module (ECM) – microprocessor fault | ECM |
| P1611 | Engine control module (ECM) – central processor malfunction | ECM |
| P1611 0 | Engine control module (ECM) – sub central processor malfunction | TP sensor input failure, pedal position sensor input failure, throttle motor control failure, cruise control cancel failure |
| P1629 | Alternator – field circuit malfunction | Wiring, alternator voltage regulator, alternator |
| P1631 | Throttle motor relay, coil circuit OFF – malfunction | Wiring, throttle motor relay |
| P1632 | Alternator/charging system – load circuit malfunction | Wiring, alternator voltage regulator, alternator |
| P1633 | Engine control module (ECM) – central processor malfunction | ECM |
| P1634 | ECM/throttle monitoring – circuit malfunction | ECM |
| P1637 | CAN data bus, ECM/ABS/TCS control module – network malfunction | Wiring, ABS/TCS control module, ECM |
| P1638 | CAN data bus, ECM/instrumentation control module – network malfunction | Wiring, instrumentation control module, ECM |
| P1642 | CAN data bus – circuit malfunction | Wiring |
| P1643 | CAN data bus, ECM/TCM – network malfunction | Wiring, TCM, ECM |
| P1646 | Heated oxygen sensor (H02S) 1 (upstream), bank 1 – control malfunction | Wiring, H02S, ECM |
| P1647 | Heated oxygen sensor (H02S) 1 (upstream), bank 2 – control malfunction | Wiring, H02S, ECM |
| P1648 | Engine control module (ECM) – self-test malfunction | ECM |
| P1656 | ECM/TP sensor amplifier – circuit malfunction | ECM |
| P1657 | Throttle motor relay, coil circuit ON – malfunction | Wiring, throttle motor relay |
| P1658 | Throttle motor relay – malfunction | Wiring, throttle motor relay |
| P1672 | Engine control module (ECM) – suspension control module – CAN data bus malfunction | Wiring, CAN, suspension control module, ECM |
| P1696 | Controller area network (CAN) data bus- communication malfunction | Wiring, CAN, cruise control module, ECM |
| P1697 | Cruise control switch – circuit malfunction | Wiring, cruise control switch, ECM |
| P1699 | CAN data bus, ECM to A/C control module – network malfunction | Wiring, A/C control module, ECM |
| P1710 | Transmission control valve solenoids -ground circuit malfunction | Wiring |
| P1745 | Transmission low clutch timing solenoid – circuit malfunction | Wiring, internal wiring, solenoid |
| P1746 | Transmission timing reduction solenoid – circuit malfunction | Wiring, internal wiring, solenoid |
| P1747 | Transmission brake timing solenoid 2/4 – circuit malfunction | Wiring, internal wiring, solenoid |
| P1755 | Controller area network (CAN) data bus- communication malfunction | Wiring, electronic parking brake (EPB), ECM |
| P1777 | CAN data bus, torque reduction – malfunction | Wiring, TCM, ECM |
| P1780 | Transmission gear selection switch D-4 –
circuit malfunction | Wiring, selector cable adjustment, TR sensor, transmission shift control module, TCM |
| P1793 | TCM, ignition power supply – circuit malfunction | Wiring, relay |
| P1796 | CAN data bus, TCM – malfunction | Wiring, TCM |
| P1797 | CAN data bus, ECMITCM – malfunction | Wiring, TCM, ECM |
| P1799 | CAN data bus, TCM/ABSITCS control module – network malfunction | Wiring, TCM, ABS/TCS control module |