Traction Control Light: What It Means and What to Do

The Traction Control Light means the system that limits wheel spin is either working right now (flashing), switched off, or disabled by a fault (steady).

Caution
Can I keep driving? If it flashed briefly on a slippery surface and went out, that is normal. If it stays on, the car can usually be driven normally, but there is no traction or stability assistance, so drive gently in rain, snow, or ice and have it checked soon. If the ABS or red brake light is also on, have the brakes inspected before driving further.
What it looks like
A car viewed from behind or above with two curved, wavy skid lines trailing beneath it; the 'off' version adds the word OFF.
Color
Amber/yellow. It flashes briefly while the system is actively limiting wheel spin, stays on steadily when there is a fault, and may read 'TCS OFF', 'ESC OFF', or 'OFF' beneath the symbol when the system has been switched off. Some vehicles use green for a system-active indicator.

Also called: TCS light, ESC light, stability control light, car with squiggly lines light, skidding car light

Updated 2026-11-07 · By CarWhere Research

Why the traction control light comes on

Traction control and electronic stability control use wheel-speed sensors, a steering-angle sensor, and a yaw sensor to detect when a wheel is spinning or the car is sliding. The system then reduces engine power and applies individual brakes to regain grip. Because it shares the wheel-speed sensors and hydraulic unit with the anti-lock brakes, many problems turn on the ABS and traction control lights together. Some vehicles also disable traction control when the engine computer has a fault, such as a misfire or throttle problem, so the check engine light may appear with it.

Steady vs flashing

Flashing for a few seconds while accelerating on rain, snow, ice, or gravel is normal and means the system is working; ease off the throttle. Steady means the system is off or disabled by a fault. A steady light that reads 'TCS OFF' or 'ESC OFF' usually means the button was pressed; press it again or restart the car to re-enable it. A steady light without the OFF text, especially with the ABS light, points to a sensor or module fault.

Common causes

  1. Wheel slip on a slick surface (flashing only, normal)
  2. Traction control switched off with the button, showing 'TCS OFF'
  3. Failed or dirty wheel-speed sensor, or damaged sensor wiring
  4. Damaged tone ring or reluctor ring at a wheel hub
  5. Steering-angle sensor out of calibration, often after an alignment or steering work
  6. Mismatched tire sizes or a very low tire changing wheel speeds
  7. Engine faults that disable traction control, such as misfires or throttle-body problems
  8. ABS module or low system voltage problems

What to do when the traction control light comes on

  1. If the light flashed on a slippery surface, ease off the accelerator and let the tires regain grip.
  2. If it stays on, check whether it says OFF; press the traction control button or restart the car to turn the system back on.
  3. Check whether the ABS, red brake, or check engine light is also on, and test that the brake pedal feels normal.
  4. Confirm all four tires are the same size and properly inflated.
  5. If the light remains steady after a restart, have the codes read from the ABS and engine modules, which often requires a scanner that reads more than engine codes.
  6. Drive gently, leave extra following distance, and avoid hard cornering until it is repaired.

Symbols and colors vary by manufacturer; your owner’s manual has the exact meaning for your vehicle.

Related OBD-II codes

U0121 — Lost Communication With Anti-Lock Brake System (ABS) Control Module

P0500 — Vehicle Speed Sensor "A"

P0300 — Random/Multiple Cylinder Misfire Detected

P2135 — Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation

U0100 — Lost Communication With ECM/PCM "A"

Traction Control Light FAQ

What does the traction control light mean?

The Traction Control Light means the system that limits wheel spin is either working right now (flashing), switched off, or disabled by a fault (steady).

Can I keep driving with the traction control light on?

If it flashed briefly on a slippery surface and went out, that is normal. If it stays on, the car can usually be driven normally, but there is no traction or stability assistance, so drive gently in rain, snow, or ice and have it checked soon. If the ABS or red brake light is also on, have the brakes inspected before driving further.

Why does my traction control light come on when I accelerate?

A brief flash during acceleration means a drive wheel started to spin and the system cut power or braked that wheel to restore grip. It is normal on wet, icy, or loose surfaces; if it happens on dry pavement, check tire condition and pressure.

Why are my traction control and ABS lights on together?

Both systems rely on the same wheel-speed sensors and hydraulic control unit, so a single bad sensor, damaged wire, or module fault usually disables both. Normal braking typically remains, but without anti-lock or traction assistance.

Should I turn traction control off?

Keep it on for normal driving. Switching it off briefly can help when stuck in deep snow, mud, or sand, where some wheel spin is needed to get moving; turn it back on once the car is free.

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Sources

General information written by CarWhere Research, not a diagnosis of your vehicle. When in doubt, stop in a safe place and follow your owner’s manual.