What does it mean when the TC light comes on in a car?

[JoelRose]

The TC in a car refers to the Traction Control System. If the TC light comes on, there are two possible situations: 1. The traction control system was accidentally turned off. Normally, the car's traction control system is turned on. If the owner touches the traction control switch next to the gear lever, the traction control system will be turned off, and the TC light will come on. The owner can turn the control switch back on to eliminate the TC light. 2. If it is not an accidental touch issue, then the traction control system has malfunctioned. The causes of the malfunction include the following situations: solenoid valve failure; dirty engine oil clogging the solenoid valve filter; wear of the actuator gear and impeller causing oil pressure leakage and triggering the alarm; dirty throttle with an opening reaching 20%, causing the engine computer to misjudge a TC fault. In such cases, immediate repair is necessary.