I had the same problem 2 weeks ago on my 78,000 mile vehicle.
The next day, all the lights were off. I still took it to the dealer,
and they replaced the throttle sensor. Now, 1 week later the
VSC & VSC OFF lights came back on, but the CEL remained off
this time. The next day the lights were off again. I'm thinking
it might be a humidity or dampness problem, as both times the
car had parked in the rain for several hours, and the lights came
on during the first time driving it after it got wet. I don't know
if the car has a history of this happening, as I've only had the
car 3 weeks (bought it because my wife said I needed a more
reliable car than the Cadillac I'd been driving, I'd say its not
off to a good start on first impressions!).
