DFFX fault codes
5,361 codes · 6 vehicle records · 0 ECU records · 0 live-data parameters
Codes 5,361
| Code | Description | Brands | System |
|---|---|---|---|
| P0401 | Exhaust Gas Recirculation Flow Insufficient Detected | 41 | Powertrain |
| P0402 | Exhaust Gas Recirculation Flow Excessive Detected | 42 | Powertrain |
| P0403 | Exhaust Gas Recirculation Circuit | 44 | Powertrain |
| P0404 | Exhaust Gas Recirculation Circuit Range/Performance | 39 | Powertrain |
| P0405 | Exhaust Gas Recirculation Sensor A Circuit Low | 41 | Powertrain |
| P0406 | Exhaust Gas Recirculation Sensor A Circuit High | 41 | Powertrain |
| P0407 | EGR Sensor B Circuit Low | 33 | Powertrain |
| P0408 | EGR Sensor B Circuit High | 33 | Powertrain |
| P0409 | Exhaust Gas Recirculation Sensor A Circuit | 34 | Powertrain |
| P040A | Oil gauge failure | 23 | Powertrain |
| P040B | EGR Temperature Sensor A Circuit Range/Performance | 29 | Powertrain |
| P040C | EGR Temperature Sensor A Circuit Low | 32 | Powertrain |
| P040D | EGR Temperature Sensor A Circuit High | 32 | Powertrain |
| P040E | EGR temperature sensor 'A' circuit intermittent/erratic | 22 | Powertrain |
| P040F | EGR temperature sensor 'A'/'B' correlation | 22 | Powertrain |
| P0410 | AIR System A | 39 | Powertrain |
| P0411 | AIR System A Incorrect Flow Detected | 38 | Powertrain |
| P0412 | AIR System Switching Valve A Circuit | 38 | Powertrain |
| P0413 | AIR System Switching Valve A Circuit Open | 31 | Powertrain |
| P0414 | AIR System Switching Valve A Circuit Shorted | 31 | Powertrain |
| P0415 | AIR System Switching Valve B Circuit | 29 | Powertrain |
| P0416 | AIR System Switching Valve B Circuit Open | 27 | Powertrain |
| P0417 | AIR System Switching Valve B Circuit Shorted | 26 | Powertrain |
| P0418 | AIR System Control A Circuit | 31 | Powertrain |
| P0419 | AIR System Control B Circuit | 27 | Powertrain |
| P041A | EGR temperature sensor 'B' circuit | 22 | Powertrain |
| P041B | Exhaust gas recirculation (EGR) temperature sensor B range/performance failure | 22 | Powertrain |
| P041C | Exhaust gas recirculation (EGR) temperature sensor B short circuit to ground | 23 | Powertrain |
| P041D | Exhaust gas recirculation (EGR) temperature sensor B short circuit to power supply | 23 | Powertrain |
| P041E | EGR temperature sensor 'B' circuit intermittent/erratic | 22 | Powertrain |
| P041F | Air system switching valve 'A' circuit low | 22 | Powertrain |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) | 42 | Powertrain |
| P0421 | Warm Up Catalyst Efficiency Below Threshold (Bank 1) | 31 | Powertrain |
| P0422 | Main Catalyst Efficiency Below Threshold (Bank 1) | 33 | Powertrain |
| P0423 | Heated Catalyst Efficiency Below Threshold (Bank 1) | 26 | Powertrain |
| P0424 | Heated Catalyst Temperature Below Threshold (Bank 1) | 23 | Powertrain |
| P0425 | Catalyst Temperature Sensor Circuit (Bank 1 Sensor 1) | 27 | Powertrain |
| P0426 | Catalyst Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 1) | 26 | Powertrain |
| P0427 | Catalyst Temperature Sensor Circuit Low (Bank 1 Sensor 1) | 28 | Powertrain |
| P0428 | Catalyst Temperature Sensor Circuit High (Bank 1 Sensor 1) | 28 | Powertrain |
| P0429 | Catalyst Heater Control Circuit/Open (Bank 1) | 26 | Powertrain |
| P042A | Catalyst temperature sensor circuit bank 1 sensor 2 | 23 | Powertrain |
| P042B | Catalyst temperature sensor circuit range/performance bank 1 sensor 2 | 22 | Powertrain |
| P042C | Catalyst temperature sensor circuit low bank 1 sensor 2 | 22 | Powertrain |
| P042D | Catalyst temperature sensor circuit high bank 1 sensor 2 | 22 | Powertrain |
| P042E | EGR 'A' control stuck open | 30 | Powertrain |
| P042F | EGR 'A' control stuck closed | 30 | Powertrain |
| P0430 | Catalyst System Efficiency Below Threshold (Bank 2) | 39 | Powertrain |
| P0431 | Warm Up Catalyst Efficiency Below Threshold (Bank 2) | 27 | Powertrain |
| P0432 | Catalyst 2 Efficiency Below Threshold (Bank 2) | 30 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.