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
P1025
Fuel Pressure Control Valve Mechanical Malfunction
Volkswagen
Fuel and Air Metering
High severity
P1028
Intake Manifold Air Control Solenoid Short Open Circuit
Volkswagen
Fuel and Air Metering
High severity
P1030
Intake Manifold Air Control Valve Position Sensor Lower Limit Not Reached
Volkswagen
Fuel and Air Metering
High severity
P1031
Intake Manifold Air Control Valve Position Sensor Specification Not Attained
Volkswagen
Fuel and Air Metering
High severity
P1035
Nitrogen Oxides Sensor Range Performance Problem
Volkswagen
Auxiliary Emissions Control
Medium severity
P1036
Nitrogen Oxides Sensor Short To Positive
Volkswagen
Auxiliary Emissions Control
Medium severity
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