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
P048A
Exhaust Pressure Control Valve A Stuck Closed
Generic
Auxiliary Emissions Control
Medium severity
P048C
Exhaust Pressure Control Valve Position Sensor/Switch Circuit Range/Performance
Generic
Auxiliary Emissions Control
Medium severity
P049B
Exhaust Gas Recirculation B Flow Insufficient Detected
Generic
Auxiliary Emissions Control
Medium severity
P049C
Exhaust Gas Recirculation B Flow Excessive Detected
Generic
Auxiliary Emissions Control
Medium severity
P049D
Exhaust Gas Recirculation A Control Position Exceeded Learning Limit
Generic
Auxiliary Emissions Control
Medium severity
P04A5
Exhaust Pressure Control Valve B Stuck Closed
Generic
Auxiliary Emissions Control
Medium severity
P04A8
Exhaust Pressure Control Valve B Position Sensor/Switch Circuit Low
Generic
Auxiliary Emissions Control
Medium severity
P050A
Cold Start Idle Air Control System Performance
Generic
Vehicle Speed and Idle Control System
High severity
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