Generic Fault Codes & DTC List
Manufacturer and ECU-specific fault-code meanings. Check the stated ECU, model and code format against your diagnostic scan.
| Code | Meaning | Applicability |
|---|---|---|
| P0394 | Camshaft position (CMP) sensor B, bank 2circuit intermittent | Generic Generic OBD |
| P0400 | Exhaust gas recirculation (EGR) system -flow malfunction | Generic Generic OBD |
| P0401 | Exhaust gas recirculation (EGR) system -insufficient flow detected | Generic Generic OBD |
| P0402 | Exhaust gas recirculation (EGR) system -excessive flow detected | Generic Generic OBD |
| P0403 | Exhaust gas recirculation (EGR) -circuit malfunction | Generic Generic OBD |
| P0404 | Exhaust gas recirculation (EGR) system range/performance problem | Generic Generic OBD |
| P0405 | Exhaust gas recirculation (EGR) valve position sensor A low input | Generic Generic OBD |
| P0406 | Exhaust gas recirculation (EGR) valve position sensor A high input | Generic Generic OBD |
| P0407 | Exhaust gas recirculation (EGR) valve position sensor B low input | Generic Generic OBD |
| P0408 | Exhaust gas recirculation (EGR) valve position sensor B high input | Generic Generic OBD |
| P0409 | Exhaust gas recirculation (EGR) sensor A circuit malfunction | Generic Generic OBD |
| P040A | Exhaust Gas Recirculation Temperature Sensor "A" Circuit | Generic Generic OBD |
| P040B | Exhaust Gas Recirculation Temperature Sensor "A" CircuitRange/Performance | Generic Generic OBD |
| P040C | Exhaust Gas Recirculation Temperature Sensor "A" Circuit Low | Generic Generic OBD |
| P040D | Exhaust Gas Recirculation Temperature Sensor "A" Circuit High | Generic Generic OBD |
| P040E | Exhaust Gas Recirculation Temperature Sensor "A" Circuit Intermittent/Erratic | Generic Generic OBD |
| P040F | Exhaust Gas Recirculation Temperature Sensor "A"/"B" Correlation | Generic Generic OBD |
| P0410 | Secondary air injection (AIR) system -malfunction | Generic Generic OBD |
| P0411 | Secondary air injection (AIR) system -incorrect flow detected | Generic Generic OBD |
| P0412 | Secondary air injection (AIR) solenoid A -circuit malfunction | Generic Generic OBD |
| P0413 | Secondary air injection (AIR) solenoid A -open circuit | Generic Generic OBD |
| P0414 | Secondary air injection (AIR) solenoid A -short circuit | Generic Generic OBD |
| P0415 | Secondary air injection (AIR) solenoid B -circuit malfunction | Generic Generic OBD |
| P0416 | Secondary air injection (AIR) solenoid B -open circuit | Generic Generic OBD |
| P0417 | Secondary air injection (AIR) solenoid B -short circuit | Generic Generic OBD |
| P0418 | Secondary air injection (AIR) pump relay A -circuit malfunction | Generic Generic OBD |
| P0419 | Secondary air injection (AIR) pump relay B -circuit malfunction | Generic Generic OBD |
| P041A | Exhaust Gas Recirculation Temperature Sensor "B" Circuit | Generic Generic OBD |
| P041B | Exhaust Gas Recirculation Temperature Sensor "B" Circuit Range/Performance | Generic Generic OBD |
| P041C | Exhaust Gas Recirculation Temperature Sensor "B" Circuit Low | Generic Generic OBD |
| P041D | Exhaust Gas Recirculation Temperature Sensor "B" Circuit High | Generic Generic OBD |
| P041E | Exhaust Gas Recirculation Temperature Sensor "B" Circuit Intermittent/Erratic | Generic Generic OBD |
| P041F | Secondary Air Injection System Switching Valve "A" Circuit Low | Generic Generic OBD |
| P0420 | Catalytic converter system, bank 1 -efficiency below threshold | Generic Generic OBD |
| P0421 | Warm up catalytic converter, bank 1 -efficiency below threshold | Generic Generic OBD |
| P0422 | Main catalytic converter, bank 1 -efficiency below threshold | Generic Generic OBD |
| P0423 | Heated catalytic converter, bank 1 -efficiency below threshold | Generic Generic OBD |
| P0424 | Heated catalytic converter, bank 1 -temperature below threshold | Generic Generic OBD |
| P0425 | Catalytic converter temperature sensor, bank 1 | Generic Generic OBD |
| P0426 | Catalytic converter temperature sensor, bank 1 range/performance | Generic Generic OBD |
| P0427 | Catalytic converter temperature sensor, bank 1 -low input | Generic Generic OBD |
| P0428 | Catalytic converter temperature sensor, bank 1 high input | Generic Generic OBD |
| P0429 | Catalytic converter heater, bank 1 -control circuit malfunction | Generic Generic OBD |
| P042A | Catalyst Temperature Sensor Circuit | Generic Generic OBD |
| P042B | Catalyst Temperature Sensor Circuit Range/Performance | Generic Generic OBD |
| P042C | Catalyst Temperature Sensor Circuit Low | Generic Generic OBD |
| P042D | Catalyst Temperature Sensor Circuit High | Generic Generic OBD |
| P042E | Exhaust Gas Recirculation "A" Control Stuck Open | Generic Generic OBD |
| P042F | Exhaust Gas Recirculation "A" Control Stuck Closed | Generic Generic OBD |
| P0430 | Catalytic converter system, bank 2 -efficiency below threshold | Generic Generic OBD |
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