2009 Prius Traction Control Alarm Malfunction After Service

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by MC777, May 19, 2026 at 4:53 PM.

  1. MC777

    MC777 Junior Member

    Joined:
    Oct 12, 2018
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    Location:
    Coconut Creek, Florida
    Vehicle:
    2009 Prius
    Model:
    N/A
    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
     

    Attached Files:

  2. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
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    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    What was included with the 65k service? What did the shop touch? That's where you would begin looking. But these errors don't go away on their own, that's just a way to get rid of you. Since you paid for the service, it's his duty to fix the issue or find the cause of it