Volkswagen Audi Group Specialists in Swindon

Audi OBD-II Fault Codes

Search our list of Audi Diagnostic Trouble Codes (DTCs) to better understand what your check engine light may indicate.

About Audi Fault Codes

When the check engine light appears on your Audi, the On-Board Diagnostic (OBD-II) system has detected a stored fault within one of the vehicle’s monitored systems. Each fault is recorded as a unique diagnostic trouble code to help identify the affected area or component.

These codes are commonly used across many modern Audi models and can relate to systems such as the engine, gearbox, emissions control and vehicle electronics.

If you have access to a diagnostic scanner, you may be able to retrieve the fault code yourself — or bring your vehicle to us for a structured diagnostic inspection using dealer-level diagnostic equipment and manufacturer-compatible software.

These codes are standard across most modern Audi models, covering areas like the engine, gearbox, emissions system, and electronics. If you have a scanner, you can read the fault code yourself — or bring your vehicle to us for a full diagnostic scan using dealer-level VAG equipment.

Browse All Audi OBD-II Fault Codes

Use the list below to locate your Audi diagnostic code. Each code links to an informational page outlining what it typically indicates and why further professional diagnostics may be required to confirm the root cause.

The information provided is for guidance only and does not replace professional diagnostic testing. VGS Performance Ltd is an independent specialist and is not affiliated with or endorsed by Audi AG or any associated manufacturer.