OBD fault code library

Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.

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Fault codes

P0647 Air Conditioning Clutch Relay Circuit High

Generic Computer Output Circuit High severity

P0648 Immobilizer Lamp Control Circuit

Generic Computer Output Circuit High severity

P0650 Malfunction Indicator Lamp Control Circuit Malfunction

Generic Computer Output Circuit High severity

P0651 Sensor Reference Voltage B Circuit/Open

Generic Computer Output Circuit High severity

P0653 Sensor Reference Voltage B Circuit High

Generic Computer Output Circuit High severity

P0654 Engine Speed Output Circuit

Generic Computer Output Circuit High severity

P0656 Fuel Level Output Circuit Malfunction

Generic Computer Output Circuit High severity

P0657 Actuator Supply Voltage Circuit open

Generic Computer Output Circuit High severity

P0658 Actuator Supply Voltage A Circuit Low

Generic Computer Output Circuit High severity

P0659 Actuator Supply Voltage A Circuit High

Generic Computer Output Circuit High severity

P0661 Intake Manifold Tuning Valve Control Circuit Low Bank 1

Generic Computer Output Circuit High severity

P0662 Intake Manifold Tuning Valve Control Circuit High Bank 1

Generic Computer Output Circuit High severity

P0664 Intake Manifold Tuning Valve Control Circuit Low Bank 2

Generic Computer Output Circuit High severity

P0665 Intake Manifold Tuning Valve Control Circuit High Bank 2

Generic Computer Output Circuit High severity

P0667 PCM/ECM (Engine Control Module) /TCM Internal Temperature Sensor A Range/Performance

Generic Computer Output Circuit High severity