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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P2571 Direct Ozone Reduction Catalyst Temp Sensor Circuit Interim/Erratic4
Auxiliary Emissions Control Medium severity
P2574 Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low4
Auxiliary Emissions Control Medium severity
P2575 Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High4
Auxiliary Emissions Control Medium severity
P2578 Turbocharger Speed Sensor Circuit
Injector Circuit High severity
P2579 Turbocharger Speed Sensor Circuit Range/Performance
Injector Circuit High severity
P257A Vacuum Reservoir Control Circuit/Open
Vehicle Speed and Idle Control System High severity
P257B Vacuum Reservoir Control Circuit Low
Vehicle Speed and Idle Control System High severity
P257F Engine Hood Switch Circuit High
Computer Output Circuit High severity
P2580 Turbocharger Speed Sensor Circuit Low
Injector Circuit High severity
P2581 Turbocharger Speed Sensor Circuit High
Injector Circuit High severity
P2583 Cruise Control Front Distance Range Sensor Single Sensor or Centre
Vehicle Speed and Idle Control System Medium severity
P2585 Fuel Additive Control Module Warning Lamp Request
Computer Output Circuit High severity
P2586 Turbocharger Boost Control Position Sensor B Circuit
Injector Circuit High severity
P2588 Turbocharger Boost Control Position Sensor B Circuit Low
Injector Circuit High severity
P258B Vacuum Pump Control Range/Performance
Vehicle Speed and Idle Control System Low severity

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