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Abs brake and traction lights random

Discussion in 'Gen 3 Prius Technical Discussion' started by PopularJ, Feb 11, 2022.

  1. PopularJ

    PopularJ New Member

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    Erie Pa
    Vehicle:
    2010 Prius
    Model:
    III
    Hello so recently my good ol’ Prius has been having abs brake and traction lights turn on. Brought out my scanner and it’s a co215 and said it’s left rear sensor got it check out and was told it’s all good but the issue is that the lights will go on and then like maybe 5-10 min later go back out again, I was told it had something maybe to do with cold weather but I’m completely clueless anything would help at this point
     
    #1 PopularJ, Feb 11, 2022
  2. bisco

    bisco cookie crumbler

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    i would check all the connections, and if everything looks good, replace it.

    if in doubt, doublecheck the codes with tech stream. how many miles on her?
     
    #2 bisco, Feb 11, 2022
  3. PopularJ

    PopularJ New Member

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    III
    She has about 217000 miles on her , I’m semi new to things what would be the best way to check and clean thr connections
     
    #3 PopularJ, Feb 11, 2022
    bisco likes this.
  4. ChapmanF

    ChapmanF Senior Member

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    If you look in the repair manual (more info) you will find a "check mode" you can enable for the wheel speed sensors. It makes the ECU's problem-reporting threshold much more sensitive, so any problems that normally seem intermittent will be much easier to reproduce and troubleshoot.
     
    #4 ChapmanF, Feb 11, 2022
  5. bisco

    bisco cookie crumbler

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    i'm just talking about a visual check of the harness going to the wheel.

    who told you it could have something to do with the cold? do you have a mechanic that services the vehicle?
     
    #5 bisco, Feb 12, 2022
  6. ChapmanF

    ChapmanF Senior Member

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    Nothing wrong with a visual check. If you find the problem that way, great.

    If you have an intermittently-detected problem that challenges you to find it, the check mode you can turn on in the skid ECU is your friend.
     
    #6 ChapmanF, Feb 12, 2022
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