In this guide you will learn how to read Cadillac fault codes. When the Check Engine Light (CEL) or any other warning light such as ABS, Airbag, TPMS turn ON in your Cadillac and you are get warning message on Driver Information Center (DIC), a Diagnostic Trouble Code (DTC) gets stored in one or more control units.
In this guide, we will take a look at how you can retrieve Cadillac fault codes using an OBD-II scanner. Reading Cadillac fault codes is very easy but knowing which scanner to use can be challenging.
Level 1 OBD2 scanners can only be used to retrieve fault codes from your Cadillac 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 a Level 2 OBD-2 scanner is needed. The procedure for reading Cadillac fault codes is similar regardless of which scanner you are using. If you want to learn more about OBD2 scanners for Cadillac read this article.