OBD2 Trouble Codes
Browse 543 diagnostic trouble codes — each with symptoms, causes, cost estimates, and repair guidance.
Random/Multiple Cylinder Misfire Detected
Cylinder 1 Misfire Detected
Cylinder 2 Misfire Detected
Cylinder 3 Misfire Detected
Cylinder 4 Misfire Detected
Cylinder 5 Misfire Detected
Cylinder 6 Misfire Detected
Cylinder 7 Misfire Detected
Cylinder 8 Misfire Detected
Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)
Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)
Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)
Knock Sensor 2 Circuit Malfunction (Bank 2)
Knock Sensor 2 Circuit Low Input (Bank 2)
Crankshaft Position Sensor A Circuit Malfunction
Crankshaft Position Sensor A Circuit Range/Performance
Camshaft Position Sensor Circuit Malfunction
Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor)
Camshaft Position Sensor A Circuit Low Input (Bank 1 or Single Sensor)
Camshaft Position Sensor A Circuit High Input (Bank 1 or Single Sensor)
Camshaft Position Sensor A Circuit Malfunction (Bank 2)
Camshaft Position Sensor A Circuit Range/Performance (Bank 2)
Ignition Coil A Primary/Secondary Circuit Malfunction
Ignition Coil B Primary/Secondary Circuit Malfunction
Ignition Coil C Primary/Secondary Circuit Malfunction
Ignition Coil D Primary/Secondary Circuit Malfunction
Ignition Coil E Primary/Secondary Circuit Malfunction
Ignition Coil F Primary/Secondary Circuit Malfunction
Ignition Coil G Primary/Secondary Circuit Malfunction
Ignition Coil H Primary/Secondary Circuit Malfunction
Exhaust Gas Recirculation (EGR) Flow Malfunction
Exhaust Gas Recirculation Flow Insufficient Detected
Exhaust Gas Recirculation (EGR) Flow Excessive Detected
Exhaust Gas Recirculation (EGR) Control Circuit Malfunction
Exhaust Gas Recirculation (EGR) Circuit Range/Performance
Exhaust Gas Recirculation (EGR) Sensor A Circuit Low
EGR Sensor A Circuit High
Secondary Air Injection System Malfunction
Secondary Air Injection System Incorrect Flow Detected
Secondary Air Injection System Switching Valve A Circuit
Catalyst System Efficiency Below Threshold (Bank 1)
Warm Up Catalytic Converter Efficiency Below Threshold (Bank 1)
Catalyst System Efficiency Below Threshold (Bank 2)
Evaporative Emission Control System Malfunction
Evaporative Emission Control System Incorrect Purge Flow
Evaporative Emission Control System Leak Detected (Small Leak)
Evaporative Emission Control System Purge Control Valve Circuit
Evaporative Emission Control System Purge Control Valve Circuit Open
Evaporative Emission Control System Purge Control Valve Circuit Shorted
Evaporative Emission Control System Vent Control Circuit Malfunction
Evaporative Emission Control System Vent Control Circuit Open
Evaporative Emission Control System Vent Control Circuit Shorted
Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
Evaporative Emission Control System Pressure Sensor/Switch Malfunction
Evaporative Emission Control System Pressure Sensor/Switch Range/Performance
Evaporative Emission Control System Pressure Sensor/Switch Low Input
Evaporative Emission Control System Pressure Sensor/Switch High
Evaporative Emission Control System Leak Detected (Large Leak)
Evaporative Emission System Leak Detected (Very Small Leak)