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This guide provides procedures on 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.

Table of Contents


What you will need


  1. Park the Chevrolet on a level surface and set the parking brakes. How to read Chevrolet  fault codes
  2. Open the driver's door and locate the OBD-2 port.

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  3. Plug your scanner into the OBD2 portPlug scanner into Chevrolet  port for diy troubleshooting
  4. Turn on the ignition by turning the key to position II. If your Chevrolet has a START/STOP button feature, press the button without pressing the brake pedal. read chevrolet codes turn on ignition
  5. Allow your scanner to turn on. Follow the prompts on your scanner to read fault codes.
  6. Diagnose the Chevrolet Check Engine Light.

Diagnose Chevrolet Anti-lock Brake System

An ABS light cannot be diagnosed with a generic OBD2 scanner. You will need an ABS diagnostic scanner.


Diagnose Chevrolet SRS Airbag 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.

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.