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Break gen 2

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by anko, Jan 2, 2022.

  1. anko

    anko New Member

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    Prius generation 2

    The car breaks by itself. It has happened several times that the car breaks by itself usually after I started the car and stopped shortly ( went into a shop) and started it again.

    After it breaks by itself at low speed, I stop the car, restart it then it works fine.

    Any ideas what I should check and repair?
    Thanks in advance for advice.
     
    #1 anko, Jan 2, 2022
    Last edited: Jan 2, 2022
  2. SFO

    SFO Senior Member

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    Do you have any OBD2 codes that you can share?

    FYI : you're moderated until you've posted 5 times
     
    #2 SFO, Jan 2, 2022
  3. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    Can you clarify if you mean brake or break?
     
    #3 JimboPalmer, Jan 2, 2022
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  4. TMR-JWAP

    TMR-JWAP Senior Member

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    Sounds like the car transaxle may be in B mode instead of D. May want to verify you have the car in D, or that the shifter isn't going bad and putting itself into B mode. Or maybe you're brushing against the shifter by accident and causing it to go into B made. I've done that one myself twice in the last year or so.
     
    #4 TMR-JWAP, Jan 3, 2022
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  5. anko

    anko New Member

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    Yes, it is brake, sorry.
    I did not change the car from D, that is 100% sure. I remember seeing the red sign just when the brake comes on.

    I will check out the code.
     
    #5 anko, Jan 3, 2022
  6. bisco

    bisco cookie crumbler

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    that means there are trouble codes that need to be read by an appropriate prius scanner.

    when you say it brakes, is it coming to a complete stop on it's own with your foot on the go pedal?
     
    #6 bisco, Jan 3, 2022
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  7. anko

    anko New Member

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    yes
     
    #7 anko, Jan 7, 2022
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  8. edthefox5

    edthefox5 Senior Member

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    Is the parking brake on lol?
     
    #8 edthefox5, Jan 7, 2022
  9. Mendel Leisk

    Mendel Leisk Senior Member

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    By this do you mean, when you take your foot off the gas pedal, it slows down too quickly, like the brakes are on?
     
    #9 Mendel Leisk, Jan 7, 2022
  10. bisco

    bisco cookie crumbler

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    yes
     
    #10 bisco, Jan 7, 2022
  11. bisco

    bisco cookie crumbler

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    could a bad skid control ecu do that?
     
    #11 bisco, Jan 7, 2022
  12. anko

    anko New Member

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    no:)
    Hi!

    No, I mean that I drive and it does not slow down but brakes. I did not take my foot off the gas pedal.
    But it has happened about three times during the last month.
    A couple of seconds after starting the engine so I did not reach high speed.
    I just restart it and the problem seems solved. (for some time)
     
    #12 anko, Jan 12, 2022
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  13. Mendel Leisk

    Mendel Leisk Senior Member

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    Is it then an odd slowing down, even though you're pushing the gas pedal? Like the car is suddenly dragging some weight behind?
     
    #13 Mendel Leisk, Jan 13, 2022
  14. ChapmanF

    ChapmanF Senior Member

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    In that case, this is a highly unusual report, and it would be very interesting if you could get access to Techstream (or to any on-board diagnostics tool with data logging capability) and log the brake fluid pressure readings, to actually capture the application of the brakes while you are driving.
     
    #14 ChapmanF, Jan 13, 2022
  15. anko

    anko New Member

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    Thanks a lot!
    I will try.
     
    #15 anko, Jan 18, 2022
  16. anko

    anko New Member

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    YES:)
     
    #16 anko, Jan 18, 2022
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  17. Another

    Another Senior Member

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    Caliper piston stuck? Very common on hybrids because of lack of use.
     
    #17 Another, Jan 18, 2022
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