What does it mean when the TC yellow light is on in a car?
2 Answers
When the TC yellow light is on in a car, it indicates that there may be a fault in the Traction Control System. TC stands for Traction Control System in English, which is designed to provide optimal traction under various driving conditions, thereby improving the vehicle's passability. Reasons for the Traction Control System warning light to illuminate include: 1. Faulty solenoid valve; 2. Dirty engine oil clogging the solenoid valve filter; 3. Wear and tear on the actuator gear and impeller leading to oil pressure leakage and triggering the alarm; 4. Dirty throttle body with an opening reaching 20%, causing the engine control unit to mistakenly diagnose a TC fault.
When the TC yellow light on the car dashboard comes on, it indicates an issue with the Traction Control System. This system prevents wheel slippage on slippery surfaces. The yellow light may signal a damaged sensor, such as a dirty wheel speed sensor or a loose connector, or it could mean the system is temporarily deactivated or has detected a fault. I remember once driving in the rain when the yellow light suddenly illuminated—the car felt unstable, and the steering seemed loose. Upon inspection, it turned out the sensor was covered in mud and water. Ignoring such issues increases the risk of skidding, especially at high speeds or during turns, so I recommend visiting a professional repair shop promptly for diagnosis to prevent minor problems from escalating. If the system is manually deactivated, the yellow light is normal, but it's crucial to confirm this to avoid compromising safety.
