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
P0476
Exhaust Pressure Control Valve Range/Performance
Generic
Auxiliary Emissions Control
Medium severity
P0485
Cooling Fan Power/Ground Circuit Malfunction
Generic
Auxiliary Emissions Control
High severity
P0479
Exhaust Pressure Control Valve Intermittent
Generic
Auxiliary Emissions Control
Medium severity
P0487
Exhaust Gas Recirculation Throttle Control Circuit A Open
Generic
Auxiliary Emissions Control
Medium severity
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