Updated 5 months 4 weeks ago

How to read Cadillac fault codes

Difficulty Level

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.

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What you will need 

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  • Cadillac Warning Light and Message on DIC
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How to read Cadillac fault codes

Step 1

How to read Cadillac fault codes

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

Step 2

Open the driver's door and locate the OBD-2 port.

Step 3

Plug scanner into Cadillac port for diy troubleshooting

Plug your scanner into the OBD2 port

Step 4

Turn ON Cadillac ignition to read and clear codes with a scanner

Turn on the ignition by turning the key to position II. If your Cadillac 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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Read/Clear Cadillac Check Engine Light

Watch this video to learn how use a Level 1 OBD 2 scanner to read and clear Cadillac Check Engine Light codes.

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Diagnose Cadillac Anti-lock Brake System

Watch this video to learn how to use a Level 2 OBD 2 scanner to retrieve Cadillac Anti-lock Brake System codes.

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Diagnose Cadillac Airbag Warning Light

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

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