There are plenty of valid reasons why you'd want to turn off traction control. Usually, this applies if you're off-roading or when you're going on a track day. When it comes to these scenarios, you'd want to have better and more precise control over traction, rather than letting the computers interfere jarringly. Should you want to turn it back on, it's quite simple. All you need to do is find the traction control button and press it. In most cars, this button is located either in the center console or near the steering wheel (on the dash), with a picture of a car with swerving tire marks underneath it.