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ABS, Skid, brake system and emergency brake lights all coming on

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Terry31575, Jan 31, 2022.

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  1. Terry31575

    Terry31575 New Member

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    The ABS, Skidding, Brake and Brake system lights keep coming on, on my 2012 Prius. When they are on the brakes are working fine and I seem to have no problem driving. The lights come on and go off repeatedly during my commute (1/2 hour). It does seem to happen more when the car is cold. It has been less than 0 many morning lately. This started in a few months ago not long after having new brakes put on the car. I have tried to take it in but the lights were not on and the system did not read an error at the time. Any ideas?
     

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    #1 Terry31575, Jan 31, 2022
  2. bisco

    bisco cookie crumbler

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    if the lights have been on, and you haven't reset the 12v, there will be codes using tech stream
     
    #2 bisco, Feb 1, 2022
  3. sam spade 2

    sam spade 2 Senior Member

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    Your brake fluid might just be a tad bit low.
    Try adding a tablespoon or so.
    The shop that did your brakes should know to do that.
     
    #3 sam spade 2, Feb 1, 2022
  4. Mendel Leisk

    Mendel Leisk Senior Member

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    Yeah that's a puzzle; dealership looked at it and said they didn't see any stored codes? There should be.
     
    #4 Mendel Leisk, Feb 1, 2022
  5. tankyuong

    tankyuong Senior Member

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    I say bad 12v battery or bad wheal sensor
     
    #5 tankyuong, Feb 1, 2022
  6. ChapmanF

    ChapmanF Senior Member

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    There can start being answers instead of guesses as soon as the OP posts what the trouble codes are.

    In case of not having a scan tool handy, or not having one that successfully retrieves the codes, codes from the brake computer can be read by putting a simple jumper wire between pins Tc and CG of the diagnostic port and counting blinks on those three dash lights. Some searching on those terms will find a lot of existing posts on how to do that.
     
    #6 ChapmanF, Feb 2, 2022
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