This guide provides instructions on reading Cadillac fault codes using an OBD-II scanner. Once you read the fault codes on your Cadillac, the next step is to fix the problem. Then use the scanner again to clear the fault codes from the module that is having issues.
Use this method to diagnose a dashboard warning light or message on the DIC.
What you will need
- Park the Cadillac on level ground 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 Cadillac 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 Cadillac ABS (Anti-Lock Braking 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 a Cadillac Airbag Light that is on.
Basic OBD2 scanners can only be used to retrieve fault codes from the Engine Control Unit (ECU). Those are faults that trigger the Check Engine warning light on the dashboard.
When the Check Engine Light (CEL) or any other warning light such as ABS, Airbag, or TPMS turns on, or you get a warning message on Driver Information Center (DIC), a Diagnostic Trouble Code (DTC) gets stored in the corresponding control module.
We hope you find the Cadillac Read & Clear Fault Codes guide helpful. Check these troubleshooting and repair guides for more help on your Cadillac.
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