| Scan code | Fault location | Probable cause |
| PO, P2, UO | Refer to OBO-II trouble code tables | – |
| P1004 | Intake manifold air control valve (short runner) -performance | Automatic shut-down (ASO) relay circuitopen/short, control circuit short circuit to ground,control circuit open, intake manifold air controlvalve, ECM |
| P1115 | Engine coolant temperature (ECT) sensor/intake air temperature (IAT) sensor/outside air temperature sensor -signal variation | Wiring, ECT sensor, IAT sensor, outside airtemperature sensor, ECM |
| P1128 | Closed loop fuel control not achieved -bank 1 | Wiring, H02S, fuel system, MAP sensor, ECM |
| P1129 | Closed loop fuel control not achieved -bank 2 | Wiring, H02S, fuel system, MAP sensor, ECM |
| P1273 | NC compressor clutch control circuit 2 voltage high | Wiring, NC compressor clutch, multifunction control module, ECM |
| P1275 | NC compressor clutch control circuit 2 -circuit malfunction | Wiring, AlC compressor clutch, multifunction control module, ECM |
| P1404 | Exhaust gas recirculation (EGR) valve position sensor malfunction | Wiring, exhaust gas recirculation (EGR) valve, ECM |
| P150D | Cold start emission control -irregular idle speed | Wiring, connections, engine coolant temperature (ECT) sensor, manifold absolute pressure (MAP) sensor, H02S circuit fault, mechanical fault, ECM |
| P1572 | Brake pedal position (BPP) switch -circuit malfunction | BPP switch adjustment, wiring, BPP switch |
| P1573 | Brake pedal position (BPP) switch -circuit malfunction | BPP switch adjustment, wiring, BPP switch |
| P1593 | Cruise control system, multi-function input circuit stuck | Wiring, poor connection, multi-function switch, mechanical fault, ECM |
| P1602 | Engine control module (ECM) not programmed | New ECM not programmed, incorrectly programmed, ECM |
| P1603 | Engine control module (ECM) -RAM link error | ECM |
| P1604 | Engine control module (ECM) -RAM read/writeerror | ECM |
| P1607 | Engine control module (ECM) -shut down timer error | ECM |
| P1618 | Engine control module (ECM) -primary 5 volt output erratic | Wiring, poor connection, oil pressure sensor, APP sensor, CKP sensor, throttle control unit, TPS sensor, ECM |
| P1628 | Engine control module (ECM) -auxiliary 5 voltoutput erratic | Wiring, poor connection, APP sensor, CMP sensor, EGR solenoid, EGR valve position sensor, MAP sensor, ECM |
| P1681 | CAN data bus, instrumentation -no signal | Wiring, instrumentation control module |
| P1686 | CAN data bus, imobilizer control module nosignal | Wiring, immobilizer control module |
| P1687 | CAN data bus, instrumentation -no signal | Wiring, instrumentation control module(mechanical) |
| P1696 | Engine control module (ECM) -EEPROM error | ECM |
| P1697 | Engine control module (ECM) -EEPROM error | ECM |
| P1698 | CAN data bus, TCM -no signal | Wiring, TCM |
| U110C | Fuel level, serial communication -circuit malfunction | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
| U110E | Outside air temperature, serial communication -circuit malfunction | CAN data bus, multifunction control module front, ECM |
| U110F | Fuel volume, serial communication -circuit malfunction | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
| U1110 | Vehicle speed, serial communication -circuit malfunction | CAN data bus, ABS control module, ECM |
| U1113 | Ale pressure, serial communication -circuit malfunction | CAN data bus, body control module (BCM) power supply, ECM |
| U1120 | Wheel distance traveled, serial communication -circuit malfunction | CAN data bus, ABS control module, ECM |
| U1403 | Fuel level, serial communication -implausiblesignal | Wiring, instrument panel, CAN data bus, multifunction control module front, ECM |
| U1412 | Vehicle speed, serial communication -implausible signal | CAN data bus, ABS control module, ECM |
| U1417 | LH front wheel, distance traveled -implausible signal | ABS trouble code(s) stored, CAN data bus, ABS control module, ECM |
| U1418 | RH front wheel, distance traveled -implausible signal | ABS trouble code(s) stored, CAN data bus, ABS control module, ECM |
