What does the TC slash on the car dashboard mean?
2 Answers
The TC slash displayed on the car dashboard indicates that the traction control system is active. The traction control system, also known as the track control system, relies on electronic sensors to detect when 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 brake the wheels to prevent wheel slippage. The reasons for the TC light illuminating on the car dashboard include: 1. Solenoid valve malfunction; 2. Dirty oil clogging the solenoid valve filter; 3. Wear of the actuator gear and impeller causing oil pressure leakage, triggering an alarm; 4. Dirty throttle body with an opening reaching 20%, leading the engine computer to mistakenly diagnose a TC fault.
I noticed that when the TC slash symbol appears on the dashboard, it usually means your traction control system has been manually turned off or is in a fault state. Traction control is a safety feature that prevents wheel spin on slippery surfaces, improving driving stability. If this icon appears, first check if you accidentally pressed the TC switch button on the center console to turn it off. Many modern cars have a dedicated button that can be easily pressed by mistake. If you confirm it wasn't turned off, it might be a sensor issue, such as a dirty or damaged wheel speed sensor, preventing the system from functioning properly. This can be dangerous in snowy or rainy conditions, so it's advisable to slow down immediately and find a safe place to check. If the light remains on after restarting the car, it's best to visit a repair shop to scan for specific fault codes with a diagnostic tool. Don't ignore it—last time, my friend almost slid off the shoulder because of this, but fortunately, nothing serious happened.
