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OBD2 Trouble Codes

Browse 543 diagnostic trouble codes — each with symptoms, causes, cost estimates, and repair guidance.

P0300
Powertrain
Moderate

Random/Multiple Cylinder Misfire Detected

P0301
Powertrain
Moderate

Cylinder 1 Misfire Detected

P0302
Powertrain
Moderate

Cylinder 2 Misfire Detected

P0303
Powertrain
Moderate

Cylinder 3 Misfire Detected

P0304
Powertrain
Moderate

Cylinder 4 Misfire Detected

P0305
Powertrain
Moderate

Cylinder 5 Misfire Detected

P0306
Powertrain
Moderate

Cylinder 6 Misfire Detected

P0307
Powertrain
Moderate

Cylinder 7 Misfire Detected

P0308
Powertrain
Moderate

Cylinder 8 Misfire Detected

P0325
Powertrain
Low

Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)

P0326
Powertrain
Low

Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)

P0327
Powertrain
Low

Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)

P0328
Powertrain
Moderate

Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

P0330
Powertrain
Low

Knock Sensor 2 Circuit Malfunction (Bank 2)

P0332
Powertrain
Low

Knock Sensor 2 Circuit Low Input (Bank 2)

P0335
Powertrain
High

Crankshaft Position Sensor A Circuit Malfunction

P0336
Powertrain
Moderate

Crankshaft Position Sensor A Circuit Range/Performance

P0340
Powertrain
Moderate

Camshaft Position Sensor Circuit Malfunction

P0341
Powertrain
Moderate

Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor)

P0342
Powertrain
Moderate

Camshaft Position Sensor A Circuit Low Input (Bank 1 or Single Sensor)

P0343
Powertrain
Moderate

Camshaft Position Sensor A Circuit High Input (Bank 1 or Single Sensor)

P0345
Powertrain
Moderate

Camshaft Position Sensor A Circuit Malfunction (Bank 2)

P0346
Powertrain
Moderate

Camshaft Position Sensor A Circuit Range/Performance (Bank 2)

P0351
Powertrain
Moderate

Ignition Coil A Primary/Secondary Circuit Malfunction

P0352
Powertrain
Moderate

Ignition Coil B Primary/Secondary Circuit Malfunction

P0353
Powertrain
Moderate

Ignition Coil C Primary/Secondary Circuit Malfunction

P0354
Powertrain
Moderate

Ignition Coil D Primary/Secondary Circuit Malfunction

P0355
Powertrain
Moderate

Ignition Coil E Primary/Secondary Circuit Malfunction

P0356
Powertrain
Moderate

Ignition Coil F Primary/Secondary Circuit Malfunction

P0357
Powertrain
Moderate

Ignition Coil G Primary/Secondary Circuit Malfunction

P0358
Powertrain
Moderate

Ignition Coil H Primary/Secondary Circuit Malfunction

P0400
Powertrain
Moderate

Exhaust Gas Recirculation (EGR) Flow Malfunction

P0401
Powertrain
Moderate

Exhaust Gas Recirculation Flow Insufficient Detected

P0402
Powertrain
Moderate

Exhaust Gas Recirculation (EGR) Flow Excessive Detected

P0403
Powertrain
Moderate

Exhaust Gas Recirculation (EGR) Control Circuit Malfunction

P0404
Powertrain
Moderate

Exhaust Gas Recirculation (EGR) Circuit Range/Performance

P0405
Powertrain
Moderate

Exhaust Gas Recirculation (EGR) Sensor A Circuit Low

P0406
Powertrain
Moderate

EGR Sensor A Circuit High

P0410
Powertrain
Low

Secondary Air Injection System Malfunction

P0411
Powertrain
Low

Secondary Air Injection System Incorrect Flow Detected

P0412
Powertrain
Moderate

Secondary Air Injection System Switching Valve A Circuit

P0420
Powertrain
Moderate

Catalyst System Efficiency Below Threshold (Bank 1)

P0421
Powertrain
Moderate

Warm Up Catalytic Converter Efficiency Below Threshold (Bank 1)

P0430
Powertrain
Moderate

Catalyst System Efficiency Below Threshold (Bank 2)

P0440
Powertrain
Moderate

Evaporative Emission Control System Malfunction

P0441
Powertrain
Low

Evaporative Emission Control System Incorrect Purge Flow

P0442
Powertrain
Moderate

Evaporative Emission Control System Leak Detected (Small Leak)

P0443
Powertrain
Low

Evaporative Emission Control System Purge Control Valve Circuit

P0444
Powertrain
Low

Evaporative Emission Control System Purge Control Valve Circuit Open

P0445
Powertrain
Low

Evaporative Emission Control System Purge Control Valve Circuit Shorted

P0446
Powertrain
Low

Evaporative Emission Control System Vent Control Circuit Malfunction

P0447
Powertrain
Low

Evaporative Emission Control System Vent Control Circuit Open

P0448
Powertrain
Low

Evaporative Emission Control System Vent Control Circuit Shorted

P0449
Powertrain
Low

Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

P0450
Powertrain
Low

Evaporative Emission Control System Pressure Sensor/Switch Malfunction

P0451
Powertrain
Low

Evaporative Emission Control System Pressure Sensor/Switch Range/Performance

P0452
Powertrain
Low

Evaporative Emission Control System Pressure Sensor/Switch Low Input

P0453
Powertrain
Low

Evaporative Emission Control System Pressure Sensor/Switch High

P0455
Powertrain
Moderate

Evaporative Emission Control System Leak Detected (Large Leak)

P0456
Powertrain
Low

Evaporative Emission System Leak Detected (Very Small Leak)

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