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
P2526
Vacuum Reservoir Press Sensor Circuit Range/Performance
Vehicle Speed and Idle Control System
High severity
P2557
Engine Coolant Level Sensor/Switch Circuit Range/Performance
Fuel and Air Metering
High severity
P2568
Direct Ozone Reduction Catalyst Temp Sensor Circuit Range/Performance
Auxiliary Emissions Control
Medium severity
P2572
Direct Ozone Reduction Catalyst Deterioration Sensor Circ4
Auxiliary Emissions Control
Medium severity
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