A common problem with Toyota and Lexus vehicles is the owner may find the “VSC OFF” and “Check Engine” lights illuminated simultaneously. What is the meaning of this?
VSC stands for “Vehicle Stability Control“. It is likely that “Traction Control” will not work while this light is illuminated. On some vehicles, the “skidding vehicle” or “TRAC OFF” light may also be lit as well.
Most Toyota owners will find that when the Check Engine and VSC lights are lit, there is a problem with an O2 Sensor or gas cap. Try tightening or replacing the gas cap for a hopefully cheap fix.
To be sure of the problem you may want to take your vehicle to an Auto Zone or NAPA store to have them plug in a code reader to determine the problem. Another option would be to take the vehicle in for service.
If your problem turns out to be O2 sensor related, you can continue driving the vehicle without problems, but you may not achieve the most efficient gas mileage.
O2 sensors can be difficult or easy to replace yourself depending on the make and model of the vehicle. Some require access under the vehicle, while others are accessible under the hood.
Linda says
Our code reader said the O2 sensor was the problem. We have replaced every O2 sensor on the vehicle, but the light still comes on about every 200 miles. We take it off, it comes back on. We replaced the gas cap. What is the problem?
Edgard Prado says
I have the same issue with my Toyota 4Runner and have had it for a couple of years already. Replaced O2, replaced Gas Cap, and the annoying lights keep coming back on. What is the issue Toyota ??
Shelby says
Same issue with my Highlander. All three lights come on sometimes, but other times they don’t. I’ve had the engine, the O2 sensors, AND the gas cap replaced. Still… Lights come on. And… It fails emissions when the lights are on.