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
P2647
High voltage detected in engine oil pressure circuit
Honda
Fuel and Air Metering
High severity
P2648
Low voltage detected in engine VTEC solenoid valve circuit
Honda
Fuel and Air Metering
High severity
U0107
Communication error between ECM and Throttle actuator control module
Honda
Computer Output Circuit
High severity
U101D
Internal malfunction detected in Steering control module
Volkswagen
Communication Network System
High severity
P1747
Internal malfunction detected in electronic gear selection control module
Mercedes Benz
Computer Output Circuit
High severity
P1910
Internal malfunction detected in electronic gear selection control module
Mercedes Benz
Computer Output Circuit
High severity
P2003
Particulate trap efficiency lower than limits
Mercedes Benz
Auxiliary Emissions Control
High severity
P2080
Issue in exhaust gas temperature sensor
Mercedes Benz
Auxiliary Emissions Control
High severity
U0002
Internal malfunction detected in ECM (CAN bus)
Mercedes Benz
Communication Network System
High severity
U0004
Internal malfunction detected in ECM (CAN bus)
Mercedes Benz
Communication Network System
High severity
U0007
Internal malfunction detected in ECM (CAN bus)
Mercedes Benz
Communication Network System
High severity
U0009
Internal malfunction detected in ECM (CAN bus)
Mercedes Benz
Communication Network System
High severity
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