| Scan code | Fault location | Probable cause |
| PO, P2,UO | Refer to OBD-II trouble code tables | – |
| P1093 | Fuel rail pressure (FRP) sensor, command/actual fuel pressure -signal variation | Wiring, poor connections, FRP sensor |
| P1094 | Fuel rail pressure (FRP) sensor -signal out ofrange | Wiring, poor connections, FRP sensor |
| P1125 | Accelerator pedal position (APP) sensor 1/2/3 -signal variation | Wiring, APP sensor, ECM |
| P1172 | Fuel level sensors. primary & secondary sensorno fuel level change during fuel transfer from secondary to primary tank | Wiring. secondary fuel pump, fuel level sensors |
| P1191 | Intake manifold system -air leak | Intake hose pipe connections, EGR system, ECM |
| P1214 | Fuel injection pump timing -out of range | Fuel injection pump timing incorrectly set, CKP sensor, ECM |
| P1216 | Fuel injection duration -pulse width signal shorter than expected | Wiring, fuel injection duration control solenoid, fuel injection pump control module, ECM |
| P1217 | Fuel injection duration -pulse width signal longerthan expected | Wiring, fuel injection duration control solenoid, fuel injection pump control module, ECM |
| P1218 | Fuel injection pump calibration resistor-circuit malfunction | Wiring, calibration resistor |
| P1223 | Injector 1 -circuit malfunction | Wiring, injector, FICM |
| P1224 | Injector 1 -circuit malfunction | Wiring, injector, ECM |
| P1226 | Injector 2 -circuit malfunction | Wiring, injector, FICM |
| P1227 | Injector 2 -circuit malfunction | Wiring, injector, ECM |
| P1229 | Injector 3 -circuit malfunction | Wiring, injector, FICM |
| P122A | Injector 3 -circuit malfunction | Wiring, injector, ECM |
| P1232 | Injector 4 -circuit malfunction | Wiring, injector, FICM |
| P1233 | Injector 4 -circuit malfunction | Wiring, injector, ECM |
| P1235 | Injector 5 -circuit malfunction | Wiring, injector, FICM |
| P1236 | Injector 5 -circuit malfunction | Wiring, injector, ECM |
| P1238 | Injector 6 -circuit malfunction | Wiring, injector, FICM |
| P1239 | Injector 6 -circuit malfunction | Wiring, injector, ECM |
| P1241 | Injector 7 -circuit malfunction | Wiring, injector, FICM |
| P1242 | Injector 7 -circuit malfunction | Wiring, injector, ECM |
| P1244 | Injector 8 -circuit malfunction | Wiring, injector, FICM |
| P1247 | Injector 8 -circuit malfunction | Wiring, injector, ECM |
| P1261 | Injectors 1, 4, 6 & 7 -high voltage | Wiring, injector(s), ECM |
| P1262 | Injectors 2, 3, 5 & 8 -high voltage | Wiring, injector(s), ECM |
| P1270 | Engine control module (ECM). APP sensor signal -analogue/digital process malfunction | Engine control module (ECM) |
| P1271 | Accelerator pedal position (APP) sensor 1/2signal variation | Wiring, APP sensor, ECM |
| P1272 | Accelerator pedal position (APP) sensor 2/3signal variation | Wiring, APP sensor, ECM |
| P1273 | Accelerator pedal position (APP) sensor 1/3signal variation | Wiring, APP sensor, ECM |
| P1277 | Accelerator pedal position (APP) sensor 1voltage low | Wiring, APP sensor, ECM |
| P1278 | Accelerator pedal position (APP) sensor 1 voltage high | Wiring, APP sensor, ECM |
| P1282 | Accelerator pedal position (APP) sensor 2 voltage low | Wiring, APP sensor, ECM |
| P1283 | Accelerator pedal position (APP) sensor 2 voltage high | Wiring, APP sensor, ECM |
| P1287 | Accelerator pedal position (APP) sensor 3 voltage low | Wiring, APP sensor, ECM |
| P1288 | Accelerator pedal position (APP) sensor 3 voltage high | Wiring, APP sensor, ECM |
| P1293 | Injector control module -circuit malfunction bank 1 | Injector control module |
| P1294 | Injector control module -circuit malfunction bank 2 | Injector control module |
| P1295 | Injector control module -circuit malfunction bank 1 | Injector control module |
| P1296 | Injector control module -circuit malfunction bank 2 | Injector control module |
| P1345 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -signal variation | Wiring, CKP sensor, CMP sensor |
| P1404 | Exhaust gas recirculation (EGR) vacuum sensor/barometric pressure (BARO) sensorvoltage low | Wiring, EGR vacuum sensor/BARO sensor, ECM |
| P1406 | Exhaust gas recirculation (EGR) valve position sensor range performance | Wiring, EGR valve tight/sticking, EGR valve position sensor |
| P1409 | Exhaust gas recirculation (EGR) systemmalfunction | Wiring, vacuum pipes, EGR vacuum sensor, EGR valve |
| P1431 | Fuel level sensor, secondary -circuit malfunction | Wiring, fuel level sensor |
| P1432 | Fuel level sensor -low voltage | Wiring open circuit, fuel level sensor |
| P1433 | Fuel level sensor -high voltage | Wiring short circuit to positive, fuel level sensor |
| P1550 | System voltage low | Wiring, battery, alternator |
| P154A | Intake air heater -feedback circuit | Wiring, glow plug control module, intake air heater |
| P154B | Intake air heater -voltage signal circuit | Wiring, glow plug control module, intake air heater |
| P154C | Intake air heater -current signal circuit | Wiring, glow plug control module, intake air heater |
| P154D | Intake air heater -temperature signal circuit | Wiring, glow plug control module, intake air heater |
| P1600 | Engine control module (ECM) -malfunction | ECM |
| P1621 | Engine control module (ECM) -memoryperformance | ECM |
| P1626 | Engine control module (ECM) -fuel enable signallost | Wiring, poor connections, immobilizer control module, ECM |
| P1627 | Engine control module (ECM) -analogue/ digital performance | Engine control module (ECM) |
| P1630 | Engine control module (ECM), immobilizer code -learning mode | ECM immobilizer code programming not completed |
| P1631 | Engine control module (ECM) -incorrect immobilizer code | Incorrect key, immobilizer code not programmed |
| P1635 | Engine control module (ECM), sensor supply voltage -circuit malfunction | Wiring short to ground, poor connections, CKP sensor, EGR control/BARO sensor, injectionpump position/fuel temperature sensor, TC boost pressure sensor, ECM |
| P1637 | Altemator waming lamp, control signal -circuit malfunction | Wiring, instrument panel, ECM |
| P1639 | Engine control module (ECM), sensor supplyvoltage -circuit malfunction | Wiring, poor connections, APP sensor, TC boost pressure sensor, BARO sensor, ECM |
| P1641 | Malfunction indicator lamp (MIL) -circuitmalfunction | Wiring, fuses, MIL |
| P1643 | Glow plug waming lamp -circuit malfunction | Wiring, glow plug warning lamp, ECM |
| P1653 | Exhaust gas recirculation (EGR) vent valve circuit malfunction | Wiring, poor connections, EGR vent valve, ECM |
| P1654 | Service throttle soon warning lamp -circuit malfunction | Wiring, fuses, service throttle soon warning lamp |
| P1655 | Exhaust gas recirculation (EGR) control valve -circuit malfunction | Wiring, poor connections, EGR control valve,ECM |
| P1656 | Turbocharger (TC) wastegate regulating valve -circuit malfunction | Wiring, TC wastegate regulating valve, ECM |
| P1658 | Fuel injector control module (FICM) malfunction | FICM |
| P1680 | Engine control module (ECM) -malfunction | ECM |
| P1681 | Engine control module (ECM) -malfunction | ECM |
| P1683 | Engine control module (ECM) -malfunction | ECM |
| P1687 | Fuel injector control module (FICM) -stuck on | ECM, FICM |
| P1781 | Transmission control module (TCM), malfunction indicator lamp (MIL) request signal -volta~ehighllow | Wiring TCM, ECM |
| P1810 | Transmission gear pressure switch, signal -circuitmalfunction | Wiring open circuit/short circuit to ground,reverse/D1/D2/D3/D4 gear pressure switch(es), ECM |
| P1811 | Shift time too long -adaptation limit reached | Fluid level low, transmission mechanical fault |
| P1860 | Torque converter clutch (TCC) solenoid, pulse width modulation (PWM) -circuit malfunction | Wiring open circuit/short circuit to ground, TCC solenoid, ECM |
| P1870 | Torque converter clutch (TCC) -slip speed excessive | Transmission fluid level, wiring, TCC solenoid, ECM |
| U1026 | Transmission control module (TCM)/four wheel drive control module, CAN data bus -communication malfunction | Wiring, SCM |
| U1192 | Engine control module (ECM)limmobilizer control module, CAN data bus -signal malfunction | Wiring, immobilizer control module, ECM |
| U1800 | Engine control module (ECM)/fuel injector control module (FICM), CAN data bus -communication malfunction | Wiring, FICM, ECM |
| U2104 | Engine control module (ECM)/transmission control module (TCM)/Fuel injector control module (FICM), CAN data bus communication malfunction | Wiring, TCM, FICM, ECM |
