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
P2031
Issue in exhaust gas temperature sensor
Mercedes Benz
Auxiliary Emissions Control
High severity
P2032
Issue in exhaust gas temperature sensor
Mercedes Benz
Auxiliary Emissions Control
High severity
P2033
Issue in exhaust gas temperature sensor
Mercedes Benz
Auxiliary Emissions Control
High severity
P2081
Issue in exhaust gas temperature sensor
Mercedes Benz
Auxiliary Emissions Control
High severity
P2100
Open circuit detected in throttle control motor
Mercedes Benz
Fuel and Air Metering
High severity
U0001
Internal malfunction detected in ECM (CAN bus)
Mercedes Benz
Communication Network System
High severity
U0003
Internal malfunction detected in ECM (CAN bus)
Mercedes Benz
Communication Network System
High severity
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