Q: Traction Control System light always on

asked by on

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
  1. Home
  2. Questions
  3. Traction Control System light always on

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

Q: My car leaked all the oil from underneath the car

This suggests you may have a leak resulting from a failing gasket somewhere in your engine. As you know, there are many different places in your motor that are sealed by gaskets. I would suggest narrowing this down by placing...

Q: My car won't accelerate in drive. But will accelerate in park or reverse. The last couple of days. While driving the battery ligh

You may have a defective transmission valve body or the transaxle is bad internally. The manufacturer recommends replacing the valve body assembly first and then the complete transaxle if the problem is still happening. I suggest having you transmission tested...

Q: What’s the difference between the Low Tire Pressure light and the TPMS light?

Your car is equipped with a tire pressure monitoring system (TPMS) that is designed to keep tabs on the air pressure in each tire. When the system notices a tire is low, it automatically turns on the Low Tire Pressure...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.