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
P1001
Key On/Engine Running Not Able To Complete
Mercedes Benz
Vehicle Speed and Idle Control System
High severity
P1009
Variable Valve Timing Control Advance Malfunction
Mercedes Benz
Fuel and Air Metering
High severity
P1019
Valvetronic Eccentric Shaft Sensor Power Supply
Mercedes Benz
Fuel and Air Metering
High severity
P1020
Valvetronic Eccentric Shaft Sensor Power Supply
Mercedes Benz
Fuel and Air Metering
High severity
P1025
Fuel Pressure Control Valve Mechanical Malfunction
Mercedes Benz
Fuel and Air Metering
High severity
P1026
Intake Manifold Air Control Solenoid Short To Positive
Mercedes Benz
Fuel and Air Metering
High severity
P1027
Intake Manifold Air Control Solenoid Short To Ground
Mercedes Benz
Fuel and Air Metering
High severity
P1028
Intake Manifold Air Control Solenoid Short Open Circuit
Mercedes Benz
Fuel and Air Metering
High severity
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