The abs light stays on and the traction off, as well. Attempting to turn the traction on does nothing to engage the traction on.
Have codes checked, most common is a failed left or right wheel speed sensor , part of front wheel hub/bearing assembly.
SOURCE: Transmission Traction "Off" light stays lit with Traction button
The traction control system is controlled through the Anti-lock brake system. The way it works is if one of your wheels starts spinning the ABS applys the brake to that wheel to transfer power to the oppsite wheel that is getting traction. If your ABS is bad then your Traction control won't work. To check it I would find a parking lot on a wet day. In an open space mash in the gas. if you hear the ABS system kick in and you don't squall the tires then your good. My guess is you won't. What I would be worried about is will my ABS work. When checking the traction control is a good time to check the ABS. Acclerate to around 15 mph, then mash the brake as your live depended on it. If you hear a motor run and feel a vibration or grind in the brake peddal, then it works.
SOURCE: ABS and Traction Control lights come on intermittantly
At 45000 miles we had this problem. After replacing hubs, and abs sensors the problem was traced to a frayed wire at the firewall that was going to ground an the ac tubing.
SOURCE: abs , brake, traction control light on in 04 lesabre
check to make sure that all the the bulbs in the rear are working,even the third light
SOURCE: my traction and abs light comes on 2003 buick century
Check the ABS sensor there will be one on each of the front wheels and if it's not there believe it or not you have a bad ground connection on your battery post. Check all the wiring on each of the sensors make sure they don't have any 90* bends in them or you will have a faulty connection and maybe look for cracks in the protective plastic.
SOURCE: TRACTION LIGHT STAYS ON AND ABS LIGHT AFTER
There is a good chance that the wheel speed sensor, (ABS sensor) has gone bad or gotten to dirty. It's common for the ABS sensor to get too dirty and can not read the speed ring on the wheel hub since it's magnetic. The common repair is to spray Brake Parts Cleaner on the ABS and speed ring on the hub and inspect for damages to the wire harness. The ABS sensor is on the inside of the wheel hub so it's easy to get to, if you not sure what your looking for. Remove the wheel and along the A-arm, you will find a wire harness which leads to the wheel hub (Bearing). There is where your going to find the sensor, just clean it and inspect for corrosion and gap, you can take paper and fold it 5 times and place it between the sensor and speed ring for the proper gap. Good luck and keep me posted, if there is a Auto Zone around your area, have them scan the car just to make sure it's not your ABS modulator which would cast $$$ to replace.
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