2009 Prius Traction Control Alarm Malfunction After Service

Hi there,

I recently dropped off my 2009 Prius for its 65K service. When I picked it up, the orange VSC/TRAC light came on at 35mph, with a loud beeping sound, and it stays on until my speed is below 35 again. I can also feel the brakes kick in when I go around a bend in the road and it won't 'recover' until my speed is below 35 again, sometimes as low as 25mph before the brakes will let up.

There was nothing wrong with it before the service. The shop owner told me about it when I picked up the car, said he doesn't know why it's happening, and that 'he wishes he never ran diagnostics on the car'. ?? He said it will go away by itself after a few days, and/or it could be a bigger, pricey issue that must be fixed.

I've never had an issue before, why now all of a sudden?

Has anyone else had this issue before? If so, how did you fix it?

Please and thank you!

MC