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By YOUCANIC on Jun 3, 2019

How to read Cadillac fault codes

In this guide, you will learn how to read and clear Cadillac fault codes.

When the Check Engine Light (CEL) or any other warning light such as ABS, Airbag, TPMS turn on or you get a warning message on Driver Information Center (DIC), a Diagnostic Trouble Code (DTC) gets stored in the corresponding control module. 

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.

What you will need 

Basic 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.

Here are some popular scanners you can use: 

The procedure for reading Cadillac fault codes is similar regardless of which scanner you are using.

To learn more about OBD2 scanners for Cadillac read this article.


  • Cadillac Warning Light
  • Message on DIC

How to read Cadillac fault codes

Step 1

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

How to read Cadillac fault codes


Step 2

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


Step 3

Plug your scanner into the OBD2 port

Plug scanner into Cadillac port for diy troubleshooting


Step 4

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.

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


Step 5

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


Diagnose Cadillac Anti-lock Brake System

Watch this video to learn how to use an ABS scanner to retrieve Cadillac Anti-lock Brake System codes.

Diagnose Cadillac Airbag Warning Light

Watch this video to learn how to use a multi-system scanner to troubleshoot Cadillac Airbag Light on.


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