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Diagnostic Trouble Codes

P0100 - P0199 P0500 - P0599 P0900 - P0999 P1300 - P1399 P1700 - P1799
P0200 - P0299 P0600 - P0699 P1000 - P1099 P1400 - P1499 P1800 - P1899
P0300 - P0399 P0700 - P0799 P1100 - P1199 P1500 - P1599  
P0400 - P0499 P0800 - P0899 P1200 - P1299 P1600 - P1699  
PO400 - PO499 Numbered Code Identification Chart

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 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 EVAP Leak Monitor Small Leak Detected

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 Over Current

P0485 Cooling Fan Power/Ground Circuit Malfunction

(note: the diagnostic trouble codes listed are the most likely definition, some manufactures have specific codes for individual models. If the trouble code listed does not apply to your vehicle consult an Car Repair Manual)


Look up Trouble code questions in our Car Repair forum section.

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