* Traction Control System is Disabled: The most common reason is that the driver has manually deactivated the traction control system. Many Cavaliers have a button to do this (often labeled "Trac Off" or a similar designation). Check your console or dashboard to see if the system has been intentionally turned off.
* Wheel Speed Sensor Malfunction: The traction control system relies on wheel speed sensors to detect when a wheel is losing traction. A faulty sensor will trigger the light. This is a frequent cause.
* ABS Sensor Problem: The anti-lock braking system (ABS) and traction control are closely linked. A faulty ABS sensor can also illuminate the traction control light.
* Low Tire Pressure: Significantly different tire pressures between wheels can confuse the traction control system.
* Faulty Traction Control Module (TCM): The TCM is the "brain" of the traction control system. A malfunctioning TCM will require professional diagnosis and repair.
* Wiring Issues: Damaged or corroded wiring within the traction control system can also cause the light to come on.
* Other Sensor Problems: Other sensors involved in the system (like yaw sensors) can malfunction and trigger the light.
What to do:
1. Check if Trac Off was manually activated: First and foremost, look for a button to turn the traction control off and check if it's been pressed.
2. Check tire pressure: Ensure all tires are inflated to the correct pressure (check the sticker on your driver's side doorjamb).
3. Have it scanned: Take your Cavalier to a mechanic or auto parts store that can read OBD-II codes. The code will pinpoint the likely cause much more accurately than guesswork. This is the most reliable way to diagnose the problem.
Ignoring the light is not recommended. While you might still be able to drive, your ability to maintain control, especially in slippery conditions, is compromised.
