In this guide, we will take a look at how you can diagnose and retrieve Chevrolet fault codes using an OBD-II scanner.
When your Chevrolet Check Engine Light (CEL) or any other warning lights such as ABS, Airbag, TPMS stay on, a Diagnostic Trouble Code (DTC) gets stored in the respective control unit.
What you will need
- Park your Chevrolet on a level surface and set the parking brakes.
- Open the driver's door and locate the OBD-2 port.
- Plug your scanner into the OBD2 port
- Turn on the ignition by turning the key to position II. If your Chevrolet has START/STOP feature press the button without pressing the brake pedal.
- Allow your scanner to turn on. Follow the promptings on your scanner to read fault codes.
- Diagnose Chevrolet Check Engine Light
Diagnose Chevrolet Anti-lock Brake System
ABS light cannot be diagnosed with a generic OBD2 scanner. You will need an ABS diagnostic scanner.
Diagnose Chevrolet Airbag Warning Light
Similar to the ABS light, your Chevrolet SRS Airbag lights cannot be diagnosed with a basic OBD2 scanner. You will need a multi-system scanner or an ABS Scanner.
Knowing which scanner to use to read Chevrolet fault codes can be challenging. Basic 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.
To diagnose other systems such as ABS and Airbag/SRS warning lights you will need an advanced scanner. The procedure for reading Chevrolet fault codes is similar regardless of which scanner you are using.