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.

Free on OBD DashX

Looking for real-world repair data?

OBD DashX shows which problems come with each code, how often they show up in other vehicles, and how to fix them — step by step.

Real-world fix data
How often it happens
Step-by-step repairs

Browse codes on OBD DashX No sign-up needed · available in 10 languages

Fault codes

P2042 Reductant Temp Sensor Circuit

Auxiliary Emissions Control High severity

P2044 Reductant Temp Sensor Circuit Low Input

Auxiliary Emissions Control High severity

P2045 Reductant Temp Sensor Circuit High Input

Auxiliary Emissions Control High severity

P2046 Reductant Temp Sensor Circuit Interim

Auxiliary Emissions Control High severity

P2065 Fuel Level Sensor B Circuit

Auxiliary Emissions Control High severity

P2066 Fuel Level Performance

Auxiliary Emissions Control High severity

P2068 Fuel Level Circuit High

Auxiliary Emissions Control High severity

P2069 Fuel Level Circuit Interim

Auxiliary Emissions Control High severity

P2070 Intake Manifold Tuning (IMT) Valve Stuck Open

Computer Output Circuit High severity

P2072 Throttle Actuator Control System - Ice Blockage

Computer Output Circuit High severity

P2074 Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Higher Load

Fuel and Air Metering High severity

P2075 IMT Valve Position Sensor/Switch Circuit

Fuel and Air Metering High severity

P2077 IMT Valve Position Sensor/Switch Circuit Low

Fuel and Air Metering High severity

P2079 IMT Valve Position Sensor/Switch Circuit Interim

Fuel and Air Metering High severity

P2080 Exhaust Gas Temp Sensor Circuit Range/Performance Bank1 Sensor 1

Vehicle Speed and Idle Control System High severity