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

P1644 Internal malfunction detected in clutch control module
Volkswagen Computer Output Circuit High severity
P1647 Internal malfunction detected in ECM
Volkswagen Computer Output Circuit High severity
P1650 Internal malfunction detected in Instrument cluster control module
Volkswagen Computer Output Circuit High severity
P1653 Internal malfunction detected in ABS control module
Volkswagen Computer Output Circuit High severity
P1656 Short circuit in AC clutch relay
Volkswagen Vehicle Speed and Idle Control System High severity
P1659 Short circuit in radiator exhaust system
Volkswagen Auxiliary Emissions Control High severity
P1662 Short circuit in radiator exhaust system
Volkswagen Auxiliary Emissions Control High severity
P1666 Issue in fuel pump valve (cylinder 1)
Volkswagen Injector Circuit High severity
P1669 Issue in fuel pump valve (cylinder 4)
Volkswagen Injector Circuit High severity
P1673 Invalid speed signals from ABS system
Volkswagen Computer Output Circuit High severity
P1675 Internal malfunction detected in fuel pump control module
Volkswagen Computer Output Circuit High severity
P1678 Internal malfunction detected in drive by wire (steering) module
Volkswagen Computer Output Circuit High severity
P1682 Internal malfunction detected in ABS control module
Volkswagen Computer Output Circuit High severity
P1685 Internal malfunction detected in Power steering module
Volkswagen Computer Output Circuit High severity
P1688 Internal malfunction detected in AWD control module
Volkswagen Computer Output Circuit High severity

Search fault codes

Scan your own car

Read and clear fault codes, live data and service resets with the CaRPM app.