How to eliminate the TC light in an automatic transmission car?
2 Answers
Under normal circumstances, the car's traction control system is in the active state. If the TC light comes on, it might be because the driver accidentally touched the traction control switch near the gear shift lever, turning off the traction control system. In this case, the driver can simply reactivate the control switch to eliminate the TC light. If the issue is not accidental contact, then it indicates a malfunction in the traction control system. Possible causes for traction control system failure include: 1. Wear of the actuator gear and impeller: leading to oil pressure leakage and triggering an alarm. 2. Dirty throttle: when the opening reaches 20%, the engine computer may misjudge it as a TC fault. 3. Dirty engine oil: clogging the solenoid valve filter screen.
Last time my car's TC light came on, I did some research and found that the traction control system light is mostly caused by sensor issues. You should try turning off the engine and restarting it first—it might just be a false alarm. If the light stays on, check if the wheel speed sensor is covered in mud—I had this happen once after off-roading, and simply washing it off with water fixed the problem. If the sensor is fine, it could be an ABS module failure or a short circuit due to water in the wiring. If you don’t want the hassle, just take it to the dealership to scan for trouble codes—it’s the most reliable way to pinpoint the issue quickly. Don’t force a fix if you can’t handle it yourself, since driving with this light on affects the anti-skid function during turns, which can be quite dangerous at high speeds.
