The check engine light and the Trac Off light came on our 2013 Toyota Highlander (it has just over 12000 miles, gas engine, we had it serviced at the dealer at 10,000 miles). Pushing Trac Off button didn't turn it off nor did turning the engine on and off.. The Trac Off light will come on when the vehicle experiences a problem with its traction control system and needs to be addressed by a mechanic as soon as possible. How do you fix a TRAC off check engine light on a Toyota? The TRAC off light is a warning that your vehicle's traction control system is not working properly. This can be caused.
How TRAC OFF Works in the Toyota Highlander. When TRAC OFF is engaged, the system constantly monitors your vehicle's wheel speed. If a wheel begins to spin faster than the others, indicating a loss of traction, the system automatically applies the brakes to that wheel. This helps to redistribute the power to the wheels with more grip.. The "TRAC OFF" light in your Toyota Highlander often falls into this latter category. It's a seemingly simple indicator, yet its implications for your vehicle's performance and safety are significant. This guide aims to demystify the TRAC OFF light, explaining its function, the reasons it might illuminate, and the steps you should take.