If the Check Engine Light (CEL) or any other warning lights such as ABS, Airbag, TPMS are staying ON in your Chevrolet, a Diagnostic Trouble Code (DTC) gets stored in the respective control unit. In this guide, we will take a look at how you can diagnose and retrieve Chevrolet fault codes using an OBD-II scanner.
Knowing which scanner to use to read Chevrolet fault codes can be challenging. Level 1 OBD2 scanners can only be used to retrieve fault codes from your Chevrolet 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. The procedure for reading Chevrolet fault codes is similar regardless of which scanner you are using.