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By YOUCANIC on May 31, 2019

Why is my Cadillac ABS Light ON?

If your Cadillac ABS light stays on, the Anti-lock Braking System (ABS) may not be operating properly. A faulty or dirty wheel speed sensor, defective steering angle sensor, damaged wires, bad ABS module can all trigger a Cadillac ABS light to stay on.

When your ABS system fails, you may also get a warning message asking you to service ABS, Traction Control and Stabilitrak.

Symptoms

  • ABS Light Stays ON,
  • Longer stopping distance,
  • Service Stabilitrak Warning Message
  • Service traction control light ON
  • Traction control and stability lights ON

What to do? 

To find out why your Cadillac ABS light is on, you need to read the fault codes form the ABS module. This is a procedure that can be performed by your Cadillac dealer, a local auto mechanic or yourself. 

In this guide, we are going to show you how to read fault codes from the ABS module of your Cadillac.

What you will need

For more information read this article on Choosing the best scanner for GM vehicles.

Instructions

Follow these instructions to read ABS fault codes from Cadillac vehicles 1996 and newer. This method works on models such as ATS, CTS, XTS, CT6, XT5, Escalade, SRX, DTS, STS, BLS, XLR and Deville. 

Step 1

Cadillac parked to diagnose ABS light

Park your Cadillac on a safe area where you can work.

Step 2

Locate Cadillac OBD-2 port under the dashboard.

Step 3

Read Cadillac ABS BRAKE light codes

Plug OBD-2 scanner into the OBD2 port of your Cadillac

Step 4

Turn on Cadillac to read erase ABS light

Turn on the ignition. All Cadillac dashboard lights should turn on but do not start the engine. If your Cadillac has START/STOP button, press it twice without pressing on the brake pedal.

Step 5

ABS light troulbeshooting Cadillac ATS, CTS, XTS, CT6, XT5, Escalade, SRX, DTS, STS, BLS, XLR

Allow your Cadillac OBD-2 scanner to connect to the Engine Control Unit (ECU). This may take a few seconds.

Step 6

Select Cadillac

Select Cadillac from the menu. Manually select the Anti-lock Brake System menu.

Step 7

Read codes from Cadillac ABS module using a Level 2 OBDII scanner such as Launch Creader

Step 8

Cadillac ABS Problem

Once you fix the problem that was discovered in the previous step come back to the ABS menu and clear Cadillac ABS codes.

If your scanner cannot communicate with the ABS module, it is possible that the ABS module is defective and it needs to either be replaced which can be an expensive repair or use a third party that provides Cadillac ABS Module Repair Service

Vehicle

Feedback

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Jennifer T., 2018-04-06

My Cadillac CTS abs light turns on randomly. My brakes will stop working and are very hard to press. I took it into a mechanic and he said that I need a replacement master cylinder. The brake sensor is the problem and from what I've read, most people with this car have this same problem. The problem will occur while driving, ABS light come on, Brakes stop working. Very dangerous.

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