| Scan code | Fault location | Probable cause |
| PO, P2,UO | Refer to OBO-II trouble code tables | – |
| P1010 | Rocker arm oil control actuator -circuit malfunction | Wiring open circuit/short circuit to ground, rocker arm oil control actuator, ECM |
| P1011 | Rocker arm oil control actuator -circuit malfunction | Wiring open circuit/short circuit to positive, rocker arm oil control actuator, rocker arm oil pressure switch, ECM |
| P1012 | Rocker arm oil pressure switch -circuit malfunction | Wiring open circuit/short circuit to ground, mechanical fault, rocker arm oil control actuator,rocker arm oil pressure switch, ECM |
| P1101 | Intake air flow -incorrect | Wiring, mechanical fault, engine coolant temperature (ECT) sensor, barometric pressure (BARO) sensor, intake air temperature (IAT) sensor, manifold absolute pressure (MAP) sensor, mass air flow (MAF) sensor, throttle position (TP) switch |
| P1106 | Manifold absolute pressure (MAP) sensor voltage high, intermittent | Wiring open circuit/short circuit to positive, poor connections |
| P1107 | Manifold absolute pressure (MAP) sensor voltage low, intermittent | Wiring short circuit to ground, poor connections |
| P1111 | Intake air temperature (IAT) sensor -voltage high,intermittent | Wiring open circuit/short to positive, poor connections |
| P1112 | Intake air temperature (IAT) sensor -voltage low,intermittent | Wiring short circuit to ground |
| P1114 | Engine coolant temperature (ECT) sensor voltage low, intermittent | Wiring short circuit to ground, poor connections |
| P1115 | Engine coolant temperature (EeT) sensor voltage high, intermittent | Wiring open circuit/short to positive, poor connections |
| P1121 | Throttle position (TP) sensor -voltage high,intermittent | Wiring open circuit/short to positive, poor connections |
| P1122 | Throttle position (TP) sensor -voltage low,intermittent | Wiring open circuit/short to ground, poor connections |
| P1133 | Oxygen sensor (02S)/heated oxygen sensor (H02S) 1, bank 1 -insufficient switching | Wiring, exhaust system leaking, 02S/H02S |
| P1134 | Heated oxygen sensor (H02S) 1, bank 1 slowresponse | Wiring, oxygen sensor heater, exhaust system leaking, H02S |
| P1137 | Heated oxygen sensor (H02S) 2, bank 1 voltage low | Wiring, exhaust system leaking, H02S |
| P1138 | Heated oxygen sensor (H02S) 2, bank 1 voltage high | Wiring, H02S |
| P1153 | Heated oxygen sensor (H02S) 1, bank 2insufficient switching | Wiring, oxygen sensor heater, exhaust system leaking, H02S |
| P1154 | Heated oxygen sensor (H02S) 1, bank 2 slow response | Wiring, oxygen sensor heater, exhaust system leaking, H02S |
| P1171 | Fuel system -lean during acceleration | Fuel filter, fuel pump, H02S, injectors |
| P1189 | Engine oil pressure warning lamp switch -circuit malfunction | Wiring, engine oil pressure warning lamp switch |
| P1200 | Injectors -circuit malfunction | Wiring open circuit/short circuit to ground/short circuit to positive, injectors, ECM |
| P1257 | Supercharger (SC), boost -too high | Supercharger (SC) bypass valve hoses blockedlleaking/interchanged/not connected, wiring short circuit to ground, supercharger (SC) bypass valve solenoid, ECM |
| P1300 | Ignition control, cylinder 1 -circuit malfunction | Wiring, ignition coil, ECM |
| P1305 | Ignition control , cylinder 2 -circuit malfunction | Wiring, ignition coil, ECM |
| P1310 | Ignition control, cylinder 3 -circuit malfunction | Wiring, ignition coil, ECM |
| P1315 | Ignition control , cylinder 4 -circuit malfunction | Wiring, ignition coil, ECM |
| P1335 | Crankshaft position (CKP) sensor -circuit malfunction | Wiring, CKP sensor, ECM |
| P1336 | Crankshaft position (CKP) sensor -variation not learned | Learning procedure not performed |
| P1346 | Camshaft position actuator -circuit malfunction | Wiring, mechanical fault, camshaft position actuator, ECM |
| P1349 | Camshaft position actuator -circuit malfunction | Wiring, mechanical fault, camshaft position actuator, ECM |
| P1350 | Ignition control system, bypass monitor circuit -malfunction | Wiring, poor connections, ICM, ECM |
| P1351 | Ignition control system, coil -voltage high | Wiring open circuit, ICM, ECM |
| P1352 | Ignition control system, bypass circuit voltage high | Wiring open circuit, ICM, ECM |
| P1361 | Ignition control system, IC circuit -voltage low | Wiring, circuit short circuit to ground, poorconnections, ICM, ECM |
| P1362 | Ignition control, bypass circuit -voltage low | Wiring short circuit to ground, ICM, ECM |
| P1372 | Crankshaft position (CKP) sensor | Wiring open circuit/short circuit to ground/ short circuit to positive, CKP sensor, ECM |
| P1374 | Crankshaft position (CKP) sensor, high to low resolution frequency -signal variation | Wiring, wiring routed near spark plug wires, ignition coils arcing/tracking, ICM, ECM |
| P1380 | Antilock brake system (ABS)/traction control system (TCS), rough road signal to ECM -malfunction | ABSITCS trouble code(s) stored |
| P1381 | Antilock brake system (ABS)/traction controlsystem (TCS), rough road signal to ECM -nocommunication | Wiring, poor connections, ABSITCS |
| P1403 | Exhaust gas recirculation (EGR) solenoid 1circuit malfunction | Wiring, EGR valve, ECM |
| P1404 | Exhaust gas recirculation (EGR) valve not fully closing | Wiring, poor connections, EGR valve position sensor, EGR solenoid |
| P1404 | Exhaust gas recirculation (EGR) solenoid 2 circuit malfunction | Wiring, EGR valve, ECM |
| P1405 | Exhaust gas recirculation (EGR) solenoid 3circuit malfunction | Wiring, EGR valve, ECM |
| P1406 | Exhaust gas recirculation (EGR) valve positionsensor range performance | Wiring, EGR valve tight/sticking, EGR valve position sensor |
| P1441 | Evaporative emission (EVAP) system -leakdetected | Hose connection(s), EVAP canister, EVAP canister purge valve |
| P1442 | Evaporative emission (EVAP) system vacuum switch -circuit malfunction | Hoses blockedlleaking, wiring, EVAP canister, ECM |
| P1483 | Engine cooling system -performance | Cooling system, engine coolant temperature(ECT) sensor, intake air temperature (IAT) sensor |
| P1520 | Park/neutral position (PNP) switch -circuitmalfunction | Wiring short circuit to ground, PNP switchincorrectly adjusted |
| P1530 | NC refrigerant pressure sensor/switch -circuit malfunction | Wiring, NC refrigerant pressure sensor/switch, ECM |
| P1531 | NC refrigerant pressure sensor -voltage low | Incorrect refrigerant charge, wiring, AlC refrigerant pressure sensor, ECM |
| P1536 | NC system -ECT over temperature | Cooling system |
| P1540 | NC system -high pressure | Wiring open circuit, NC refrigerant high pressure switch, AlC system |
| P1546 | AlC compressor clutch relay -circuit malfunction | Wiring, AlC compressor clutch relay, ECM |
| P1550 | Cruise control system, motor actuator -circuitmalfunction | Wiring, poor connections, cruise control motor/actuator, ECM |
| P1554 | Cruise control status circuit -high voltage | Wiring open circuit/short circuit to ground, cruise control module, ECM |
| P1558 | Cruise control system -performance low | Wiring, poor connections, accelerator cable sticking |
| P1561 | Cruise control, vent solenoid -circuit malfunction | Wiring, solenoid valve |
| P1562 | Cruise control, vacuum solenoid -circuit malfunction | Wiring, solenoid valve |
| P1565 | Cruise control servo position sensor -circuitmalfunction | Wiring, poor connections, servo position sensor |
| P1567 | Cruise control master switch -circuit malfunction | Wiring, poor connections, cruise control master switch |
| P1568 | Cruise control system -performance high | Wiring, poor connections, accelerator cable sticking |
| P1571 | Traction control system (TCS), torque request signal -malfunction | Wiring, poor connections, ABSITCS |
| P1573 | Engine control module (ECM), ABSITCS communication -malfunction | Wiring, poor connections, ABS control module, ECM |
| P1575 | Brake pedal position (BPP) switch, extended travel contacts -voltage high | Wiring, ABS |
| P1585 | Cruise control system. inhibit output circuit | Wiring, poor connections, cruise control motor/actuator, ECM |
| P1599 | Cruise control system -engine management has operated in limited power mode | Accelerator cable sticking, brake vacuum release valve, cruise control actuator |
| P1600 | Engine control module (ECM) -malfunction | ECM |
| P1601 | CAN data bus, engine control module(ECM)Jantilock brake system (ABS)/traction control system (TCS)Jinstrumentation control module/diagnostic control module some communication lost | Wiring, poor connections, ECM, ABSITCS, diagnostic control module, instrumentation control module |
| P1602 | CAN data bus. engine control module (ECM) toanti lock brake system (ABS)/traction control system (TCS) -signal malfunction | Wiring, ABS control module |
| P1607 | Cruise control input processor -malfunction | Wiring, ECM |
| P1610 | CAN data bus. engine control module (ECM) to body control module (BCM) -communication failure | Wiring, poor connections |
| P1619 | Engine oil life monitor reset switch -circuit malfunction | Wiring short circuit to ground, engine oil life monitor reset switch, ECM |
| P1621 | Engine control module (ECM) -memory performance | ECM |
| P1623 | Engine control module (ECM). PROM -malfunction | Poor connections, incorrect programming, ECM |
| P1624 | Customer snapshot function operated | ECM trouble codes stored |
| P1626 | Engine control module (ECM) -fuel enable signal lost | Wiring, poor connections, immobilizer control module, ECM |
| P1627 | Engine control module (ECM) -malfunction | Engine control module (ECM) |
| P1629 | Engine control module (ECM) -fuel enable signal not received | Incorrect ignition key, wiring, poor connections, immobilizer control module, ECM |
| P1630 | System voltage highllow | Wiring, battery, alternator |
| P1630 | Engine control module (ECM). immobilizer code -leaming mode | ECM immobilizer code programming not completed |
| P1631 | Engine control module (ECM) -incorrect immobilizer code | Incorrect key, immobilizer code not programmed |
| P1632 | Engine control module (ECM) -fuel disable signal received | Fuses, BCM, immobilizer code |
| P1633 | Engine control module (ECM), ignition supply voltage | Fuse, wiring open circuit, ECM |
| P1634 | Engine control module (ECM) -ignition supply voltage -voltage low | Wiring open circuit, ECM |
| P1635 | Engine control module (ECM), sensor supply voltage -circuit malfunction | Wiring, poor connections, TP sensor, MAP sensor, EGR valve position sensor, fuel tank pressure (FTP) sensor, ECM |
| P1639 | Engine control module (ECM), sensor supply voltage -circuit malfunction | Wiring, poor connections, AlC refrigerant pressure sensor, ECM |
| P1640 | Engine control module (ECM), quad driver/output driver -circuit malfunction | Wiring, ECM controlled components, ECM 0 |
| P1641 | AlC compressor clutch relay -circuit malfunction | Wiring open circuit/short circuit to ground, AlC compressor clutch relay, ECM |
| P1641 | Malfunction indicator lamp (MIL) -circuit malfunction | Wiring, poor connections, MIL, ECM |
| P1643 | Fuel pump, control signal -circuit malfunction | Wiring, fuel pump control module, ECM |
| P1644 | Traction control system (TCS), delivered torque signal -malfunction | Wiring, poor connections, ECM |
| P1645 | Supercharger (SC) bypass valve, control signal -circuit malfunction | Wiring, SC bypass valve, ECM |
| P1646 | Supercharger (SC) bypass valve, control signal -circuit malfunction | Wiring, SC bypass valve, ECM |
| P1650 | Engine control module (ECM), quad driver/ output driver -circuit malfunction | Wiring, ECM controlled components, ECM 0 |
| P1651 | Engine coolant blower motor relay 1 -circuit malfunction | Wiring, engine coolant blower motor relay, ECM |
| P1652 | Engine coolant blower motor relay 2 & 3 circuit malfunction | Wiring, engine coolant blower motor relay(s),ECM |
| P1653 | Traction control system (TCS), delivered torque signal -malfunction | Wiring, poor connections, ECM |
| P1654 | AlC compressor clutch relay -circuit malfunction | Wiring open circuit/short circuit to ground, AlC compressor clutch relay, ECM |
| P1655 | Evaporative emission (EVAP) canister purge valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister vent valve, ECM |
| P1656 | Camshaft position actuqtor -circuit malfunction | Wiring open circuit/short circuit to ground, camshaft position actuator, ECM |
| P1660 | Engine control module (ECM), quad driver/ output driver -circuit malfunction | Wiring, ECM controlled components, ECM 0 |
| P1662 | Cruise control, inhibit output circuit malfunction | Wiring open circuit/short circuit to ground, cruise control motor/actuator, cruise control module,ECM |
| P1663 | Alternator warning lamp, control signal -circuit malfunction | Wiring, instrument panel, ECM |
| P1665 | Evaporative emission (EVAP) canister vent valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister vent valve, ECM |
| P1667 | Fuel pump, control signal -circuit malfunction | Wiring, fuel pump control module, ECM |
| P1668 | Alternator ‘L’ terminal -circuit malfunction | Wiring, voltage regulator, alternator, ECM |
| P1670 | Engine control module (ECM), quad driver/output driver -circuit malfunction | Wiring, ECM controlled components, ECM D |
| P1671 | Malfunction indicator lamp (MIL) -circuitmalfunction | Wiring open circuit/short circuit to ground/short circuit to positive, MIL, ECM |
| P1672 | Engine oil level ‘low’ warning lamp, control signal -circuit malfunction | Wiring short circuit to ground, engine oil level, ECM |
| P1673 | Engine coolant ‘hot’ warning lamp, control signal -circuit malfunction | Wiring, instrument panel, cooling system, ECM |
| P1675 | Evaporative emission (EVAP) canister vent valve-circuit malfunction | Wiring, poor connection, EVAP canister vent valve, ECM |
| P1676 | Evaporative emission (EVAP) canister purge valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister purge valve, ECM |
| P1680 | Engine control module (ECM) -malfunction | ECM |
| P1681 | Engine control module (ECM) -malfunction | ECM |
| P1683 | Engine control module (ECM) -malfunction | ECM |
| P1689 | Traction control system (TCS), delivered torque signal -malfunction | Wiring, poor connections, ECM |
| P1690 | Rocker arm oil control actuator -circuit malfunction | Wiring open circuit/short circuit to ground, rocker arm oil control actuator, ECM |
| P1692 | Rocker arm oil control actuator -circuit malfunction | Wiring open circuit/short circuit to positive, rocker arm oil control actuator, rocker arm oil pressure switch, ECM |
| P1693 | Rocker arm oil pressure switch -circuit malfunction | Wiring open circuit/short circuit to ground, mechanical fault, rocker arm oil control actuator, rocker arm oil pressure switch, ECM |
| P1725 | Transmission input shaft speed sensor circuit malfunction | Wiring open circuit/short circuit to ground, input shaft speed sensor, ECM |
| P1760 | Transmission fluid pressure (TFP) solenoid -circuit malfunction | Wiring open circuit/short circuit, TFP solenoid, ECM |
| P1780 | Park/neutral position (PNP) switch -circuit malfunction | Wiring short circuit to ground, PNP syvitch incorrectly adjusted, PNP switch, ECM |
| P1790 | Overdrive solenoid | Wiring open circuit/short circuit, overdrive solenoid, ECM |
| P1810 | Transmission fluid pressure (TFP) switch -manual valve pOSition | Fluid level low, wiring, selector lever linkage incorrectly adjusted, ECM |
| P1811 | Shift time too long -adaptation limit reached | Fluid level low, transmission mechanical fault |
| P1814 | Torque converter clutch (TCC) -over-stressed | Fluid level low, fluid condition, transmission mechanical fault |
| P1815 | Transmission fluid pressure (TFP) switch -invalidgear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM |
| P1816 | Transmission fluid pressure (TFP) switch -invalid gear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM |
| P1817 | Transmission fluid pressure (TFP) switch -invalidgear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM |
| P1818 | Transmission fluid pressure (TFP) switch -invalid gear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM |
| P1819 | Transmission range (TR) switch, signals ‘AlB/C &P’ signal variation | Wiring, TR switch |
| P1820 | Transmission range (TR) switch, signal ‘A’voltage low | Wiring short to ground, TR switch |
| P1822 | Transmission range (TR) switch, signal ‘B’voltage high | Wiring, TR switch |
| P1823 | Transmission range (TR) switch, signal ‘P’voltage low | Wiring short to ground, TR switch |
| P1825 | Transmission range (TR) switch, signals ‘AlB/C &P’ -incorrect signal | Wiring, TR switch |
| P1826 | Transmission range (TR) switch, signal ‘C’ voltage high | Wiring, TR switch |
| P1842 | Gear shift, 1-2 -malfunction | ATF level/condition, short circuit, wiring, 55, TCM |
| P1843 | Gear shift, 1-2 -malfunction | ATF level/condition, short circuit, wiring, 55, TCM |
| P1845 | Gear shift, 2-3 -malfunction | ATF level/condition, short circuit, wiring, 55, TCM |
| P1847 | Gear shift, 2-3 -malfunction | ATF level/condition, short circuit, wiring, 55, TCM |
| P1860 | Torque converter clutch (TCC) solenoid -circuit malfunction | Wiring open circuit/short circuit to ground, TCC solenoid, ECM |
| P1866 | Torque converter clutch (TCC) solenoid -circuit malfunction | Wiring open circuit/short circuit to positive, TCC solenoid, TCM, ECM |
| P1867 | Torque converter clutch (TCC) solenoid -circuit malfunction | Wiring open circuit/short circuit to positive,TCCso~n~d,TCM,ECM |
| P1868 | Transmission fluid life | Replace transmission fluid and filter |
| P1887 | Torque converter clutch (TCC) release switch -circuit malfunction | Wiring open circuit, TCC solenoid release switch, ECM |
| U1000 | CAN data bus -communication malfunction | Wiring, BCM, ECM, instrumentation controlmodule,50M |
| U1001 | CAN data bus -loss of serial communication | Wiring, BCM, ECM, instrumentation controlmodule,50M |
| U1016 | CAN data bus, engine control module (ECM)/antilock brake system (ABS)/traction control system (TCS)linstrumentation control module/diagnostic control module -loss of serial communication | Wiring, poor connections, ECM, AB5ITC5,diagnostic control module, instrumentation control module |
| U1161 | CAN data bus -communication malfunction, door control module | Wiring, passenger door control module |
| U1162 | CAN data bus -communication malfunction, door control module | Wiring, rear door control module |
| U1163 | CAN data bus -communication malfunction, door control module | Wiring, rear door control module |
| U1170 | CAN data bus -communication malfunction, door control module | Wiring, driver door control module, driver’s door switch module |
| U1254 | CAN data bus -loss of serial communication | Wiring, SCM, ECM, instrumentation control module,SDM |
| U1255 | CAN data bus -communication malfunction | Wiring, SCM, ECM, instrumentation control module,SDM |
| U1300 | CAN data bus -signal low | Wiring |
| U1301 | CAN data bus -signal high | Wiring |
| U1305 | CAN data bus -signal high or low | Wiring |
| U1450 | CAN data bus -communication malfunction, electronic compass | Wiring, electronic compass, instrumentation control module |
| U1500 | Vehicle communication interface module (VCIM) -malfunction | VCIM |
| U2105 | Engine control module (ECM), CAN data bus -lost communication with body control module (BCM)/transmission control module (TCM) | Wiring |
