If the warning light such as Check Engine, ABS, Airbag, TPMS are coming ON in your Audi, a Diagnostic Trouble Code (DTC) gets stored in one or more control unit. The first step in troubleshooting the problem is retrieving the fault code. In this guide, we will take a look at how you can read and clear Audi fault codes using various OBD-II scanners.
Knowing which scanner to use to read Audi fault codes may be the most difficult part. Level 1 OBD2 scanners can only be used to retrieve fault codes from your Audi Engine Control Unit (ECU). Those are faults that trigger the Check Engine warning light on the dashboard. To diagnose ABS and Airbag/SRS warning lights you will need a Level 2 OBD-2 scanner. If you don't have an Audi scanner, take a minute to read the article on Best Audi/VW OBD-II scanner. The procedure for reading Audi fault codes is similar regardless of which scanner you are using.