Auxiliary emission controls · 100 definitions
Engine fault codes P0400 to P0499
Here are definitions of the most common fault codes. Choose the range containing your code or open the complete list. All 11,000 definitions are included in our EOBD Facile car diagnostic software. It is free and lets you read fault codes using an ELM327 OBD adapter or an ELM323 adapter.
Fault codes from P0400 to P0499
100 codes| Code | Meaning |
|---|---|
| P0400 | Exhaust Gas Recirculation Flow Malfunction |
| P0401 | Exhaust Gas Recirculation Flow Insufficient Detected |
| P0402 | Exhaust Gas Recirculation Flow Excessive Detected |
| P0403 | Exhaust Gas Recirculation Circuit Malfunction |
| P0404 | Exhaust Gas Recirculation Circuit Range/Performance |
| P0405 | Exhaust Gas Recirculation Sensor A Circuit Low |
| P0406 | Exhaust Gas Recirculation Sensor A Circuit High |
| P0407 | Exhaust Gas Recirculation Sensor B Circuit Low |
| P0408 | Exhaust Gas Recirculation Sensor B Circuit High |
| P0409 | Exhaust Gas Recirculation Sensor A Circuit |
| P0410 | Secondary Air Injection System Malfunction |
| P0411 | Secondary Air Injection System Incorrect Flow Detected |
| P0412 | Secondary Air Injection System Switching Valve A Circuit Malfunction |
| P0413 | Secondary Air Injection System Switching Valve A Circuit Open |
| P0414 | Secondary Air Injection System Switching Valve A Circuit Shorted |
| P0415 | Secondary Air Injection System Switching Valve B Circuit Malfunction |
| P0416 | Secondary Air Injection System Switching Valve B Circuit Open |
| P0417 | Secondary Air Injection System Switching Valve B Circuit Shorted |
| P0418 | Secondary Air Injection System Relay A Circuit Malfunction |
| P0419 | Secondary Air Injection System Relay B Circuit Malfunction |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) - More details... |
| P0421 | Warm-Up Catalyst Efficiency Below Threshold (Bank 1) |
| P0422 | Main Catalyst Efficiency Below Threshold (Bank 1) |
| P0423 | Heated Catalyst Efficiency Below Threshold (Bank 1) |
| P0424 | Heated Catalyst Temperature Below Threshold (Bank 1) |
| P0425 | Catalyst Temperature Sensor (Bank 1 Sensor 1) |
| P0426 | Catalyst Temperature Sensor Range/Performance (Bank 1 Sensor 1) |
| P0427 | Catalyst Temperature Sensor Low Input (Bank 1 Sensor 1) |
| P0428 | Catalyst Temperature Sensor High Input (Bank 1 Sensor 1) |
| P0429 | Catalyst Heater Control Circuit (Bank 1) |
| P0430 | Catalyst System Efficiency Below Threshold (Bank 2) |
| P0431 | Warm-Up Catalyst Efficiency Below Threshold (Bank 2) |
| P0432 | Main Catalyst Efficiency Below Threshold (Bank 2) |
| P0433 | Heated Catalyst Efficiency Below Threshold (Bank 2) |
| P0434 | Heated Catalyst Temperature Below Threshold (Bank 2) |
| P0435 | Catalyst Temperature Sensor (Bank 2 Sensor 1) |
| P0436 | Catalyst Temperature Sensor Range/Performance (Bank 2 Sensor 1) |
| P0437 | Catalyst Temperature Sensor Low Input (Bank 2 Sensor 1) |
| P0438 | Catalyst Temperature Sensor High Input (Bank 2 Sensor 1) |
| P0439 | Catalyst Heater Control Circuit (Bank 2) |
| P0440 | Evaporative Emission Control System Malfunction |
| P0441 | Evaporative Emission Control System Incorrect Purge Flow |
| P0442 | Evaporative Emission Control System Leak Detected (Small Leak) |
| P0443 | Evaporative Emission Control System Purge Control Valve Circuit Malfunction |
| P0444 | Evaporative Emission Control System Purge Control Valve Circuit Open |
| P0445 | Evaporative Emission Control System Purge Control Valve Circuit Shorted |
| P0446 | Evaporative Emission Control System Vent Control Circuit Malfunction |
| P0447 | Evaporative Emission Control System Vent Control Circuit Open |
| P0448 | Evaporative Emission Control System Vent Control Circuit Shorted |
| P0449 | Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction |
| P0450 | Evaporative Emission Control System Pressure Sensor Malfunction |
| P0451 | Evaporative Emission Control System Pressure Sensor Range/Performance |
| P0452 | Evaporative Emission Control System Pressure Sensor Low Input |
| P0453 | Evaporative Emission Control System Pressure Sensor High Input |
| P0454 | Evaporative Emission Control System Pressure Sensor Intermittent |
| P0455 | Evaporative Emission Control System Leak Detected (Gross Leak) |
| P0456 | Evaporative Emission System Leak Detected (very Small Leak) |
| P0457 | Evaporative Emission System Leak Detected (fuel cap loose/off) |
| P0458 | Evaporative Emission System Purge Control Valve Circuit Low |
| P0459 | Evaporative Emission System Purge Control Valve Circuit High |
| P0460 | Fuel Level Sensor Circuit Malfunction |
| P0461 | Fuel Level Sensor Circuit Range/Performance |
| P0462 | Fuel Level Sensor Circuit Low Input |
| P0463 | Fuel Level Sensor Circuit High Input |
| P0464 | Fuel Level Sensor Circuit Intermittent |
| P0465 | Purge Flow Sensor Circuit Malfunction |
| P0466 | Purge Flow Sensor Circuit Range/Performance |
| P0467 | Purge Flow Sensor Circuit Low Input |
| P0468 | Purge Flow Sensor Circuit High Input |
| P0469 | Purge Flow Sensor Circuit Intermittent |
| P0470 | Exhaust Pressure Sensor Malfunction |
| P0471 | Exhaust Pressure Sensor Range/Performance |
| P0472 | Exhaust Pressure Sensor Low |
| P0473 | Exhaust Pressure Sensor High |
| P0474 | Exhaust Pressure Sensor Intermittent |
| P0475 | Exhaust Pressure Control Valve Malfunction |
| P0476 | Exhaust Pressure Control Valve Range/Performance |
| P0477 | Exhaust Pressure Control Valve Low |
| P0478 | Exhaust Pressure Control Valve High |
| P0479 | Exhaust Pressure Control Valve Intermittent |
| P0480 | Cooling Fan 1 Control Circuit Malfunction |
| P0481 | Cooling Fan 2 Control Circuit Malfunction |
| P0482 | Cooling Fan 3 Control Circuit Malfunction |
| P0483 | Cooling Fan Rationality Check Malfunction |
| P0484 | Cooling Fan Circuit Overcurrent |
| P0485 | Cooling Fan Power/Ground Circuit Malfunction |
| P0486 | Exhaust Gas Recirculation Sensor B Circuit |
| P0487 | Exhaust Gas Recirculation Throttle Position Control Circuit |
| P0488 | Exhaust Gas Recirculation Throttle Position Control Range/Performance |
| P0489 | Exhaust Gas Recirculation Control Circuit Low |
| P0490 | Exhaust Gas Recirculation Control Circuit High |
| P0491 | Secondary Air Injection System Insufficient Flow (Bank 1) |
| P0492 | Secondary Air Injection System Insufficient Flow (Bank 2) |
| P0493 | Fan Overspeed (clutch locked) |
| P0494 | Fan Speed Low |
| P0495 | Fan Speed High |
| P0496 | Evaporative Emission System High Purge Flow |
| P0497 | Evaporative Emission System Low Purge Flow |
| P0498 | Evaporative Emission System Vent Control Circuit Low |
| P0499 | Evaporative Emission System Vent Control Circuit High |
Your code may be in another range or be manufacturer-specific (P1xxx). Our software contains 11,000 code definitions.
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