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

P2057 Reductant Injector Circuit Low Bank2 Unit 2

Auxiliary Emissions Control High severity

P2058 Reductant Injector Circuit High Bank2 Unit 2

Auxiliary Emissions Control High severity

P2060 Reductant Injector Air Pump Ctrl Circuit Low

Auxiliary Emissions Control High severity

P2061 Reductant Injector Air Pump Ctrl Circuit High

Auxiliary Emissions Control High severity

P2062 Reductant Supply Ctrl Circuit/Open

Auxiliary Emissions Control High severity

P2266 Water in Fuel Sensor Circuit Low

Fuel and Air Metering High severity

P2267 Water in Fuel Sensor Circuit High

Fuel and Air Metering High severity

U1AE4 /codes/dtcs/u1ae4

Communication Network System

P1622 Issue in Engine Coolant Temperature sensor

Audi Fuel and Air Metering High severity

P1623 Internal malfunction detected in ECM

Audi Computer Output Circuit High severity

P1625 Internal malfunction detected in Transmission Control Module

Audi Computer Output Circuit High severity

P1627 Communication error in fuel injection pump

Audi Computer Output Circuit High severity

P1628 Communication error in steering angle sensor

Audi Computer Output Circuit High severity

P1629 Communication error in distance travel sensor

Audi Computer Output Circuit High severity

P1631 Issue in accelerator pedal position sensor

Audi Vehicle Speed and Idle Control System High severity