What does the TC light mean on a car?

[OHazel]

When the TC light appears on a car, it indicates that the Traction Control system is active. The Traction Control System, also known as the Anti-Slip Regulation system, works by using electronic sensors to detect when the driven wheels' speed is lower than the driving wheels. It then sends signals to adjust ignition timing, reduce throttle opening, decrease fuel supply, downshift, or apply braking to the wheels to prevent them from slipping. Common causes for the TC warning light to illuminate include: 1. Faulty solenoid valve; 2. Dirty engine oil clogging the solenoid valve filter; 3. Wear between actuator gears and impeller causing oil pressure leaks triggering the warning; 4. Dirty throttle body with opening reaching 20%, leading to the engine computer mistakenly diagnosing a TC system fault.