Q: Traction Control System light always on

asked by on October 11, 2016

It's already been a week that the TCS light of my car keeps coming on always, even when I try to switch it off. I've experienced few times, especially when the road is wet or when I come to a complete stop, and when I slowly accelerate it, that the wheels spin and sometimes the car sways during turning. I had the car checked and scanned and the mechanic suggested to replace the brake fluid master cylinder because there was a leak according to him. But I can't see any leak outside the cylinder. Is this leak why the TCS light is on? My car has 233458 miles.
My car has an automatic transmission.

Hi, thanks for writing in. Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car’s ECU. When the ECU senses an abnormal speed given specific conditions, it engages the ABS or traction control as needed to control the vehicle properly and safely. Occasionally, these sensors can fail or become faulty working intermittently sending inaccurate signals to the ECU. When this happens, you may experience the symptoms you have described. The ABS or traction control system may be inadvertently activated by these false or inaccurate signals. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this service light for you, and make or suggest any repairs as needed.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Key hard to turn in ignition.

There is a common problem on these cars with the immobilizer causing the car not to start. I would first have the battery tested and rule out that. If this is not the problem and you have the immobilizer light...

Why would my push start not start every time? Could it be the alternator, or did the switch actually go out?

Hi there. It sounds like it could be the starter. However, the switch is definitely a possibility. If you hear a clicking sound, then the switch is operating properly. Are there any messages on the combination meter? If so, that's...

Sway bar links bad

The rear sway bar links may not be noticed they are bad unless you have weight in the back of the car or are making highway maneuvers like changing lanes. The links help to keep the rear of the car...

Related articles

How to Check If Your Tires Are in Good Condition
Tires Tires are the foundation on which your car or truck rests. Checking if your tires have good tread and suitable pressure will improve your car's handling, gas mileage, and general tire life. Here's how: Assess how much tread is...
All About All-Season Tires
Depending Depending on the climate you live in, season changes can be slight or they can be extreme. Some areas of the United States have very temperate climates with a rainy season and a hot season. Others have a short,...
How to Put a Patch on a Punctured Tire
Getting a flat tire can put a damper on your day and your wallet. Tires can go flat due...