Why Is My Traction Control Light On? Causes and What You Should Do
- Round Rock Auto Center
- May 21
- 3 min read
If your dashboard is lit up with the traction control warning light, you’re probably asking: why is my traction control light on, and is it serious? While your vehicle may still drive fine in good conditions, that light means one of your key safety systems isn’t working — and ignoring it could lead to bigger problems.
In this blog, we’ll explain what traction control does, why the light comes on, and how Round Rock Auto Center can quickly diagnose and fix the issue.
What Does the Traction Control System Do?
The Traction Control System (TCS) helps prevent your wheels from slipping during acceleration — especially on wet, icy, or loose surfaces. It works by:
Detecting wheel spin
Reducing engine power
Applying brake pressure to specific wheels
If the system detects a fault, the traction control light will turn on — and in most cases, it disables itself.
Top Reasons Your Traction Control Light Is On
1. Faulty Wheel Speed Sensor
The traction control system relies on wheel speed sensors (shared with ABS). If one of them fails or gets dirty, it can trigger the light.
Watch for:
Traction and ABS lights on together
Light comes on when driving in bad weather
No other brake symptoms
We’ll scan your system to pinpoint and clean or replace the faulty sensor.
2. Steering Angle Sensor Problems
Your steering angle sensor tells the system which way you’re turning. If it's off or miscalibrated, traction control may shut down for safety.
Signs include:
Warning light comes on during turns
Steering feels “off” or inconsistent
Light appears after a recent alignment or suspension repair
At Round Rock Auto Center, we can recalibrate or replace the sensor and restore safe handling.
3. ABS System Malfunction
Traction control is tied into your ABS system. If your ABS module or pump is malfunctioning, it can take traction control down with it.
Clues include:
ABS and TCS lights on together
Clicking noises when braking
Varying brake pedal feel
We use advanced diagnostics to test ABS components and wiring to resolve the issue at its source.
4. Brake Light Switch Failure
Believe it or not, a faulty brake light switch can affect traction control. If the car doesn’t detect when you’re braking, the system may react incorrectly.
Watch for:
Brake lights not working properly
Cruise control issues
Warning lights after braking
This is a simple, inexpensive fix we can complete quickly during your visit.
5. System Was Manually Disabled
Some cars have a button to manually turn off traction control — usually for performance driving or getting unstuck in snow/mud. If this was pressed accidentally, the light will stay on.
Solution:Check your dash or console for a traction control button. Pressing it again may turn the system back on.
Can You Drive With the Traction Control Light On?
In normal weather? Usually. But in wet, icy, or gravel conditions, your car could slip or fishtail without the system helping to correct it. It’s best to get it checked and fixed — especially before winter or road trips.
Final Thoughts
Still wondering why is my traction control light on? Whether it’s a sensor issue, a wiring fault, or just something that needs recalibrating, driving without traction control means losing a vital layer of protection.
At Round Rock Auto Center, we offer fast, accurate diagnostics for TCS, ABS, and all brake-related systems — so you can drive safely, even in the worst conditions.
Book your traction control inspection today and take control of your traction — and your peace of mind.
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