What does the TC light on the Buick LaCrosse indicate?
1 Answers
The TC light on the Buick LaCrosse dashboard refers to the Traction Control System. TC stands for Traction-Control-System in English. If the TC system is turned off, the TC light will remain constantly illuminated. If the TC system was not manually turned off, the illumination of the light may indicate the following faults: 1. Solenoid valve malfunction. 2. Dirty engine oil clogging the solenoid valve filter screen. 3. Wear on the actuator gear and impeller causing oil pressure leakage and triggering an alarm. 4. Dirty throttle body with an opening reaching 20%, leading the engine computer to mistakenly diagnose a TC fault.