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
P018F
Fuel System Over Pressure Relief Valve Frequent Activation
Generic
Fuel and Air Metering
High severity
P025E
Turbocharger/Supercharger Boost Sensor A Intermittent/Erratic
Generic
Injector Circuit
High severity
P02E8
Diesel Intake Air Flow Position Sensor Circuit Low
Generic
Fuel and Air Metering
High severity
P042C
Catalyst Temperature Sensor Circuit Low Bank 1 Sensor 2
Generic
Auxiliary Emissions Control
Medium severity
P043A
Catalyst Temperature Sensor Circuit Bank 2 Sensor 2
Generic
Auxiliary Emissions Control
Medium severity
P044B
Exhaust Gas Recirculation Temperature Sensor C Circuit Range/Performance
Generic
Auxiliary Emissions Control
Medium severity
P045E
Exhaust Gas Recirculation B Control Stuck Open
Generic
Auxiliary Emissions Control
Medium severity
P048F
Exhaust Pressure Control Valve Position Sensor/Switch Circuit Intermittent/Erratic
Generic
Auxiliary Emissions Control
Medium severity
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