This has happened to me twice now. I live in Canada and as you can probably guess, it's pretty darn cold. The first time I sprayed my car at a coin car wash the check VSC light came on. A few days of driving later, right before I was gunna call Lexus, the light disappeared. After another spray, it's back and isn't going away anymore. Was just wondering if this is a major issue or it has something to do with the weather. Can't wash your car at 0 degrees? lolz.

 

Could be an ABS sensor had got water on the serated rotor assembly between the magnetic wheel sensor. Their is one on each axle. Maybe their is some water frozen and when it thaws, the light comes off. In any event, I would take it in. Usually the ABS light would be on as well. Once they run a diagnostic, the computer will tell them which sensor is tripped.

 

Wow that was fast lol, but yes in both scenarios I felt a strange clunk when letting go of the brakes that led me to believe it was something frozen in the wheels.

 

Same thing happened to me on Saturday after I got done cleaning her up.....but I stopped turned her off and back on after that she was fine.