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

P1840 Issue in hydraulic pressure sensor solenoid in gear

Audi Transmission System High severity

P1842 Internal malfunction detected in Instrument Cluster control module

Audi Computer Output Circuit High severity

P1843 Internal malfunction detected in AWD control module

Audi Computer Output Circuit High severity

P1845 Internal malfunction detected in Steering control module

Audi Computer Output Circuit High severity

P1847 Internal malfunction detected in Brakes control module

Audi Computer Output Circuit High severity

P1848 Internal malfunction detected in ECM

Audi Computer Output Circuit High severity

P1850 Internal malfunction detected in ECM

Audi Computer Output Circuit High severity

P1851 Internal malfunction detected in Brakes control module

Audi Computer Output Circuit High severity

P1852 Internal malfunction detected in ECM

Audi Computer Output Circuit High severity

P1854 Internal malfunction detected in ECM

Audi Computer Output Circuit High severity

P1855 Internal malfunction detected in ECM

Audi Computer Output Circuit High severity

P1857 Internal malfunction detected in ECM

Audi Computer Output Circuit High severity

P1858 Communication error in engine RPM

Audi Computer Output Circuit High severity

P1859 Issue in brake pressure switch

Audi Computer Output Circuit High severity

P1860 Issue in kick down switch

Audi Computer Output Circuit High severity