Where can I find fault (or trouble) code definitions (DTCs)?

Fault code definitions, trouble code definitions or DTC definitions can be a challenge to find.

Our online database of OBDII, EOBD and VAG (VW/Audi group) fault code definitions might be able to help. It contains almost 12,000 definitions and is constantly growing - please click here

Other good sources of fault code definitions are:

• Diagnostic tool user manuals
• Car service manuals
• Technical Services CDs
• Specialist publications, e.g. Autodata
• Internet search