DTC Codes - P0400-P0499 - Auxiliary Emissions Controls


  • 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
  • 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)
  • 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)
  • 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)
  • 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
  • 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 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
  • 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 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

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