How to read Chevrolet fault codes

How to read clear Chevrolet fault codes

Updated Tuesday Apr 24, 2018

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.

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1. What you will need 

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2. Symptoms

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3. How to read Chevrolet fault codes

Step 1

How to read Chevrolet  fault codes

Park your Chevrolet on a level surface and set the parking brakes.

Step 2

Open the drivers door and locate the OBD-2 port.

Step 3

Plug scanner into Chevrolet  port for diy troubleshooting

Plug your scanner into the OBD2 port

Step 4

read chevrolet codes turn on ignition

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.

Step 5

Allow your scanner to turn on. Follow the promptings on your scanner to read fault codes.

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4. Diagnose Chevrolet Check Engine Light

Watch this video to learn how to use a Level 1 OBD 2 scanner to read and clear Chevrolet Check Engine Light codes. Read this guide to learn more about troubleshooting Chevrolet check engine light. 

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5. Diagnose Chevrolet Anti-lock Brake System

Watch this video to learn how to use a Level 2 OBD 2 scanner to retrieve Chevrolet Anti-lock Brake System codes. Follow this guide to learn more about troubleshooting Chevrolet ABS light. 

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6. Diagnose Chevrolet Airbag Warning Light

Watch this video to learn how to use a Level 2 OBD-II scanner to troubleshoot Chevrolet Airbag Light on.

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  1. If your scanner cannot communicate with the ECU ensure your scanner is compatible with your year, make and model. Also check that the 16 pin connector is fully inserted into the OBD-II port. 
  2. Basic code readers typically can only diagnose check engine light. To diagnose ABS, Airbag and Transmission problems a more advanced scanner is needed.