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
U0194
Lost Communication With Digital Audio Control Module B
Communication Network System
High severity
U0308
Software Incompatibility with Throttle Actuator Control Module
Communication Network System
High severity
U0309
Software Incompatibility with Alternative Fuel Control Module
Communication Network System
High severity
P1966
Issue in secondary air injection pump (controls emission)
Volkswagen
Auxiliary Emissions Control
High severity
P1967
Issue in secondary air injection pump (controls emission)
Volkswagen
Auxiliary Emissions Control
High severity
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