Your traction control light comes on when the system has shut itself off, either because of a fault or because the driver turned it off. If the light is on and you didn't press the button, the most common cause is the same as for an ABS light - a wheel speed sensor.
You can drive normally. The car just won't help you out of a slip on wet or icy roads. If the light comes on and off based on weather, that's normal (it activated). If it stays on solid, something is wrong.
On many cars, a short press of the TC button turns it off (light on solid). A long press turns off TC and stability. Press the button once and see if the light goes off.
Get a free diagnosis →Traction control uses ABS wheel sensors. A failing sensor shuts off both ABS and TC. Look for the ABS light on too.
On cars with stability control, the steering angle sensor tells the system which way you're trying to go. When it fails, TC and ESC shut off.
The sensor that measures sideways force and rotation. Often inside the center console area. Failure shuts off stability control on most cars.
Putting a different size or significantly worn tire on one wheel makes the sensors read different speeds. Common after a flat-tire replacement with a non-matching spare.
Get a free diagnosis →A failing module shuts off ABS, TC, and ESC together. Often shows multiple C-codes.
Honda and Toyota in particular - failing brake light switch confuses the TC system and shuts it off.
Get a free diagnosis →Traction control faults span $0 (just press the button) to $1,200 (ABS module). Tell us your year/make/model and any codes - we'll narrow it down.
Get a free vehicle-specific diagnosis →Takes under a minute. Tell us your year/make/model and what you're seeing.
If your scanner is showing one of these codes alongside this symptom, that is your starting point. Click any code for the full diagnosis.
Yes. Regular driving is unaffected. You just lose the system that prevents wheel-spin on slippery roads. Avoid hard acceleration in rain or snow until fixed.
Usually a car with squiggly lines under it, sometimes labeled "TCS," "ESC," or "VSC" depending on manufacturer. Toyotas use VSC (Vehicle Stability Control); Hondas use VSA.
Sometimes. The two systems share sensors. If your TC light came on alone, ABS is probably fine. If ABS is also lit, the underlying problem affects both - usually a wheel speed sensor.
Wheel speed sensor: $150 - $400. Steering angle sensor: $200 - $600. Yaw/G sensor: $300 - $800. ABS module: $400 - $1,200. Start with a scan to know which one.
Yes. Voltage drops during cranking can trigger and store a fault code. Clear codes after a jump or new battery and see if the light returns within 10 miles of driving.
If it comes on briefly during slip events, that's normal - the system is working. If it stays on solid after the drive, you have a real fault.