What does the T/C warning light indicate?
2 Answers
TC refers to the Traction Control warning light. TC stands for the Traction Control System, also known as the Track Control System. Its function is to improve vehicle passability. When the ABS anti-lock braking system detects wheel slippage, the traction control system applies braking to the slipping wheels to prevent traction loss. Below are relevant details: 1. Working principle of the Traction Control System: The system replaces the mechanical connection between the accelerator pedal and throttle with an electronic throttle control device. The ECU receives throttle pedal data from sensors, generates control voltage signals accordingly, and the servo motor adjusts the throttle based on these signals to reduce throttle opening and control wheel slippage. 2. How to resolve when the TC light illuminates: Normally, the vehicle's traction control system remains active. If the TC light comes on, it may indicate accidental deactivation via the traction control switch near the gearshift. Reactivating this switch will turn off the TC light. If not caused by accidental operation, the system may require professional repair at a 4S shop. 3. Common causes of Traction Control System malfunctions: Oil pressure leakage due to wear in actuator gears or impellers triggering warnings; Throttle body contamination causing 20% opening that leads to ECU misdiagnosing TC faults; Dirty engine oil clogging solenoid valve filters; Solenoid valve failure.
When I saw this light, I thought, it's the traction control system warning light, abbreviated as the T/C light. The traction control system is designed to prevent wheel slippage on slippery roads, such as when driving in the rain—it automatically adjusts engine power and braking. If the light suddenly comes on, it means the system has detected an issue or has turned itself off. Possible causes include dirty sensors, wiring faults, problems with the ABS system components, or the need for a software update. I've encountered this situation before, especially during long highway drives. Once the light comes on, the car may feel less stable during turns or acceleration, making it more prone to slippage. My advice is to first find a safe place to pull over and check if any other dashboard lights are also on. Then, try turning off the engine and restarting it to see if the light stays on. If it remains lit, avoid pushing through long-distance driving and head to a professional repair shop as soon as possible for a computer diagnosis. Don’t let the issue worsen and compromise driving safety. Safety first, after all!
