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Brake light comes on while driving

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Berch1943, Dec 29, 2020.

  1. Berch1943

    Berch1943 Member

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    Occasionally during driving i will see the red brake light come on for a few seconds, then it will turn off. I made sure the parking brake wasn't engaged. I did not do any brake work , this issue just started happening recently. 20201229_175229.jpeg

    Posted via the PriusChat mobile app.
     
    #1 Berch1943, Dec 29, 2020
  2. edthefox5

    edthefox5 Senior Member

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    It may be the brake light switch on the emergency brake.

    I would check the brake food reservoir under the hood it may be low. But i think there's another brake code for that never seen that personally.
     
    #2 edthefox5, Dec 29, 2020
    Last edited: Dec 29, 2020
    SFO likes this.
  3. Berch1943

    Berch1943 Member

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    This morning I saw the lights for ABS, VSC, emergency brake all come on. After 1 minute they went off. When I checked the codes I did not get any result. Could that also be symptom of low brake fluid?

    Posted via the PriusChat mobile app.
     
    #3 Berch1943, Jan 26, 2021
  4. bisco

    bisco cookie crumbler

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    how is the 12v health?

    what code reader?
     
    #4 bisco, Jan 26, 2021
  5. Berch1943

    Berch1943 Member

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    No idea , I got that replaced 2 years ago. I checked using Torque pro
     
    #5 Berch1943, Jan 26, 2021
  6. Mendel Leisk

    Mendel Leisk Senior Member

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    Check it? Normally you’ll never have low fluid; it falls slightly as pads/shoes wear, rises when they’re replaced (as pistons are pushed back). On our 3rd gen (fwiw), level drops about 1/2” when you open drivers door which triggers the pump.
     
    #6 Mendel Leisk, Jan 27, 2021
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