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

P2246 O2 Sensor Ref Voltage Circuit High Bank1 Sensor 1

Fuel and Air Metering Medium severity

P2248 O2 Sensor Ref Voltage Performance Bank2 Sensor 1

Fuel and Air Metering Medium severity

P2249 O2 Sensor Ref Voltage Circuit Low Bank2 Sensor 1

Fuel and Air Metering Medium severity

P2250 O2 Sensor Ref Voltage Circuit High Bank2 Sensor 1

Fuel and Air Metering Medium severity

P2A0E /codes/dtcs/p2a0e

P2A0F /codes/dtcs/p2a0f

P2252 O2 Sensor Negative Current Ctrl Circuit Low Bank1 Sensor 1

Fuel and Air Metering Medium severity

P2254 O2 Sensor Negative Current Ctrl Circuit/Open Bank2 Sensor 1

Fuel and Air Metering Medium severity

P2255 O2 Sensor Negative Current Ctrl Circuit Low Bank2 Sensor 1

Fuel and Air Metering Medium severity

P2257 Sec Air Injector Sys Ctrl A Circuit Low

Auxiliary Emissions Control Medium severity

P2258 Sec Air Injector Sys Ctrl A Circuit High

Auxiliary Emissions Control Medium severity

P2259 Sec Air Injector Sys Ctrl B Circuit Low

Auxiliary Emissions Control Medium severity

P2260 Sec Air Injector Sys Ctrl B Circuit High

Auxiliary Emissions Control Medium severity

P2262 Turbo Boost Press Not Detected-Mechanical

Injector Circuit High severity

P2263 Turbo/Supercharger Boost System Performance

Injector Circuit High severity