Proton fault codes
8,866 codes · 50 vehicle records · 175 ECU records · 0 live-data parameters
Codes 8,866
| Code | Description | Brands | System |
|---|---|---|---|
| P0411 | AIR System A Incorrect Flow Detected | 38 | Powertrain |
| P0412 | AIR System Switching Valve A Circuit | 38 | 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 |
| P0425 | Catalyst Temperature Sensor Circuit (Bank 1 Sensor 1) | 27 | 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 |
| 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 |
| P0436 | Catalyst Temperature Sensor Circuit Range/Performance (Bank 2 Sensor 1) | 25 | Powertrain |
| P043E | Evaporative Emissions (EVAP) System Leak Detection Reference Orifice Low Flow | 28 | Powertrain |
| P043F | Evaporative Emissions (EVAP) System Leak Detection Reference Orifice High Flow | 28 | Powertrain |
| P0440 | Evaporative Emission Control System | 40 | Powertrain |
| P0441 | Evaporative Emission Control System Incorrect Purge Flow | 40 | Powertrain |
| P0442 | Evaporative Emission Control System Leak Detected (Small Leak) | 43 | Powertrain |
| P0443 | Evaporative Emission Control System Purge Control Valve Circuit | 41 | Powertrain |
| P0444 | Evaporative Emission Control System Purge Control Valve Circuit Open | 36 | Powertrain |
| P0445 | Evaporative Emission Control System Purge Control Valve Circuit Shorted | 37 | Powertrain |
| P0446 | Evaporative Emission Control System Vent Control Circuit | 37 | Powertrain |
| P0449 | Evaporative Emission Control System Vent Valve/Solenoid Circuit | 30 | Powertrain |
| P0450 | Evaporative Emission Control System Pressure Sensor | 37 | Powertrain |
| P0451 | Evaporative Emission Control System Pressure Sensor Range/Performance | 36 | Powertrain |
| P0452 | Evaporative Emission Control System Pressure Sensor Low Input | 38 | Powertrain |
| P0453 | Evaporative Emission Control System Pressure Sensor High Input | 36 | Powertrain |
| P0454 | Evaporative Emission Control System Pressure Sensor Intermittent | 31 | Powertrain |
| P0455 | Evaporative Emission Control System Leak Detected (Large Leak) | 41 | Powertrain |
| P0456 | Evaporative Emission Control System Leak Detected (Very Small Leak) | 43 | Powertrain |
| P0457 | Evaporative Emission Control System Leak Detected (Fuel Cap Loose/Off) | 37 | Powertrain |
| P0458 | EVAP System Purge Control Valve A Circuit Low | 36 | Powertrain |
| P0459 | EVAP System Purge Control Valve A Circuit High | 36 | Powertrain |
| P045A | EGR B Control Circuit | 28 | Powertrain |
| P045C | EGR B Control Circuit Low | 27 | Powertrain |
| P045D | EGR B Control Circuit High | 27 | Powertrain |
| P045E | EGR 'B' control stuck open | 25 | Powertrain |
| P045F | EGR 'B' control stuck closed | 24 | Powertrain |
| P0460 | Fuel Level Sensor Circuit | 38 | Powertrain |
| P0461 | Fuel Level Sensor Circuit Range/Performance | 38 | Powertrain |
| P0462 | Fuel Level Sensor Circuit Low Input | 37 | Powertrain |
| P0463 | Fuel Level Sensor Circuit High Input | 35 | Powertrain |
| P046C | Exhaust gas recirculation (EGR) position sensor A range/performance failure | 28 | Powertrain |
| P0470 | Exhaust Pressure Sensor A Circuit | 32 | Powertrain |
| P0471 | Exhaust Pressure Sensor A Circuit Range/Performance | 29 | Powertrain |
| P0472 | Exhaust Pressure Sensor A Circuit Low | 29 | Powertrain |
| P0473 | Exhaust Pressure Sensor A Circuit High | 29 | Powertrain |
| P0475 | Exhaust Pressure Control Valve A | 30 | Powertrain |
| P0476 | Exhaust Pressure Control Valve A Range/Performance | 28 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.