P0400 Through P0499 – Auxiliary emissions controls.
The check engine light, is only the messenger, telling you to check the code for more information.
P0400 Through P0499:
- P0400 Exhaust Gas Recirculation Flow Malfunction
- P0401 is defined as a Insufficient EGR Flow
- 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
- P040A Exhaust Gas Recirculation Temperature Sensor “A” Circuit
- P040B Exhaust Gas Recirculation Temperature Sensor “A” Circuit Range/Performance
- P040C Exhaust Gas Recirculation Temperature Sensor “A” Circuit Low
- P040D Exhaust Gas Recirculation Temperature Sensor “A” Circuit High
- P040E Exhaust Gas Recirculation Temperature Sensor “A” Circuit Intermittent/Erratic
- P040F Exhaust Gas Recirculation Temperature Sensor “A”/”B” Correlation
- 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
- P041A Exhaust Gas Recirculation Temperature Sensor “B” Circuit
- P041B Exhaust Gas Recirculation Temperature Sensor “B” Circuit Range/Performance
- P041C Exhaust Gas Recirculation Temperature Sensor “B” Circuit Low
- P041D Exhaust Gas Recirculation Temperature Sensor “B” Circuit High
- P041E Exhaust Gas Recirculation Temperature Sensor “B” Circuit Intermittent/Erratic
- P041F Secondary Air Injection System Switching Valve “A” Circuit Low
- P0420 is defined as a Catalyst System Efficiency Below Threshold
- 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 (Bank 1, Sensor 1)
- P0428 Catalyst Temperature Sensor High (Bank 1, Sensor 1)
- P0429 Catalyst Heater Control Circuit (Bank 1)
- P042A Catalyst Temperature Sensor Circuit (Bank 1 Sensor 2)
- P042B Catalyst Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 2)
- P042C Catalyst Temperature Sensor Circuit Low (Bank 1 Sensor 2)
- P042D Catalyst Temperature Sensor Circuit High (Bank 1 Sensor 2)
- P042E Exhaust Gas Recirculation “A” Control Stuck Open
- P042F Exhaust Gas Recirculation “A” Control Stuck Closed
- 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 Circuit Malfunction (Bank 2, Sensor 1)
- P0436 Catalyst Temperature Sensor Circuit Range/Performance (Bank 2, Sensor 1)
- P0437 Catalyst Temperature Sensor Circuit Low (Bank 2, Sensor 1)
- P0438 Catalyst Temperature Sensor Circuit High (Bank 2, Sensor 1)
- P0439 Catalyst Heater Control Circuit (Bank 2)
- P043A Catalyst Temperature Sensor Circuit (Bank 2 Sensor 2)
- P043B Catalyst Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2)
- P043C Catalyst Temperature Sensor Circuit Low (Bank 2 Sensor 2)
- P043D Catalyst Temperature Sensor Circuit High (Bank 2 Sensor 2)
- P043E Evaporative Emission System Leak Detection Reference Orifice Low Flow
- P043F Evaporative Emission System Leak Detection Reference Orifice High Flow
- P0440 is defined as a Evaporative System Malfunction, Large Leak
- P0441 Evaporative Emission Control System Incorrect Purge Flow
- P0442 is defined as a Evaporative System Malfunction, Small Leak
- P0443 Evaporative Emission Control System Purge Control Valve Circuit
- 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
- P044A Exhaust Gas Recirculation Sensor “C” Circuit
- P044B Exhaust Gas Recirculation Sensor “C” Circuit Range/Performance
- P044C Exhaust Gas Recirculation Sensor “C” Circuit Low
- P044D Exhaust Gas Recirculation Sensor “C” Circuit High
- P044E Exhaust Gas Recirculation Sensor “C” Circuit Intermittent/Erratic
- P044F Secondary Air Injection System Switching Valve “A” Circuit High
- 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 is defined as a Evaporative System Malfunction, Gross Leak
- P0456 Evaporative Emissions System Small Leak Detected
- P0457 Evaporative Emission Control System Leak Detected
- P0458 Evaporative Emission System Purge Control Valve Circuit Low
- P0459 Evaporative Emission System Purge Control Valve Circuit High
- P045A Exhaust Gas Recirculation “B” Control Circuit
- P045B Exhaust Gas Recirculation “B” Control Circuit Range/Performance
- P045C Exhaust Gas Recirculation “B” Control Circuit Low
- P045D Exhaust Gas Recirculation “B” Control Circuit High
- P045E Exhaust Gas Recirculation “B” Control Stuck Open
- P045F Exhaust Gas Recirculation “B” Control Stuck Closed
- 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
- P046A Catalyst Temperature Sensor 1/2 Correlation (Bank 1)
- P046B Catalyst Temperature Sensor 1/2 Correlation (Bank 2)
- P046C Exhaust Gas Recirculation Sensor “A” Circuit Range/Performance
- P046D Exhaust Gas Recirculation Sensor “A” Circuit Intermittent/Erratic
- P046E Exhaust Gas Recirculation Sensor “B” Circuit Range/Performance
- P046F Exhaust Gas Recirculation Sensor “B” Circuit Intermittent/Erratic
- P0470 Exhaust Pressure Sensor “A” Circuit
- P0471 Exhaust Pressure Sensor “A” Circuit Range/Performance
- P0472 Exhaust Pressure Sensor “A” Circuit Low
- P0473 Exhaust Pressure Sensor “A” Circuit High
- P0474 Exhaust Pressure Sensor “A” Circuit Intermittent
- P0475 Exhaust Pressure Control Valve “A”
- P0476 Exhaust Pressure Control Valve “A” Range/Performance
- P0477 Exhaust Pressure Control Valve “A” Low
- P0478 Exhaust Pressure Control Valve “A” High
- P0479 Exhaust Pressure Control Valve “A” Intermittent
- P047A Exhaust Pressure Sensor “B” Circuit
- P047B Exhaust Pressure Sensor “B” Circuit Range/Performance
- P047C Exhaust Pressure Sensor “B” Circuit Low
- P047D Exhaust Pressure Sensor “B” Circuit High
- P047E Exhaust Pressure Sensor “B” Circuit Intermittent/Erratic
- P047F Exhaust Pressure Control Valve “A” Stuck Open
- P0480 Cooling Fan I 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 Over Current
- P0485 Cooling Fan Power/Ground Circuit Malfunction
- P0486 Exhaust Gas Recirculation Sensor “B” Circuit
- P0487 Exhaust Gas Recirculation Throttle Control Circuit “A” Open
- P0488 Exhaust Gas Recirculation Throttle Control Circuit “A” Range/Performance
- P0489 Exhaust Gas Recirculation “A” Control Circuit Low
- P048A Exhaust Pressure Control Valve “A” Stuck Closed
- P048B Exhaust Pressure Control Valve Position Sensor/Switch Circuit
- P048C Exhaust Pressure Control Valve Position Sensor/Switch Circuit Range/Performance
- P048D Exhaust Pressure Control Valve Position Sensor/Switch Circuit Low
- P048E Exhaust Pressure Control Valve Position Sensor/Switch Circuit High
- P048F Exhaust Pressure Control Valve Position Sensor/Switch Circuit Intermittent/Erratic
- P0490 Exhaust Gas Recirculation “A” Control Circuit High
- P0491 Secondary Air Injection System Insufficient Flow Bank 1
- P0492 Secondary Air Injection System Insufficient Flow Bank 2
- P0493 Fan Overspeed
- P0494 Fan Speed Low
- P0495 Fan Speed High
- P0496 EVAP Flow During A Non-Purge Condition
- P0497 Evaporative Emission System Low Purge Flow
- P0498 Evaporative Emission System Vent Valve Control Circuit Low
- P0499 Evaporative Emission System Vent Valve Control Circuit High