What does it mean when the car displays TC?

[Catalina]

The car displaying TC refers to the Traction Control system. When the system is active, the yellow TC light on the dashboard flashes to alert the driver. The Traction Control system, also known as the Track Control system, relies on electronic sensors to detect if the driven wheels' speed is lower than that of 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 wheel slip. Possible causes for the TC light to illuminate include: 1. Solenoid valve malfunction; 2. Dirty engine oil clogging the solenoid valve filter; 3. Wear in the actuator gears or impeller causing oil pressure leakage and triggering the alarm; 4. Dirty throttle body with opening reaching 20%, leading the engine computer to misdiagnose a TC fault.