What does the Buick TC warning light mean?

[VonKate]

Buick TC is the traction control system warning light. The function of the traction control system is to ensure that the vehicle obtains optimal traction under various driving conditions. If the owner accidentally turns off the traction control switch next to the gear shift lever, the indicator light will illuminate; if accidental pressing is ruled out, it indicates a fault in the traction control system, which requires timely inspection and repair. Extended causes for the TC light to illuminate include: 1. Solenoid valve failure. 2. Dirty engine oil clogging the solenoid valve filter screen. 3. Wear of the actuator gear and impeller causing oil pressure leakage and triggering the alarm. 4. Dirty throttle body with an opening reaching 20%, leading the engine computer to misjudge a TC fault. It is recommended to check whether the throttle body needs cleaning or if the issue is caused by the intake/exhaust camshaft solenoid valves.