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HELP - 2014 Prius V - U0129 ???

Discussion in 'Prius v Technical Discussion' started by svldvc, May 10, 2022.

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  1. svldvc

    svldvc Member

    Joined:
    Sep 21, 2010
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    Location:
    Charlotte NC
    Vehicle:
    2014 Prius v wagon
    Model:
    Five
    Bought this car like this.
    Has U0129 codes.
    Screen for some reason doesn't show energy screen with battery or anything when engine running to charge HV battery.

    Also "Break" light is on,
    "Traction Control" light is on
    "power steering" light is on
    "ABS" light is on
    "Car !" light is on

    Please advice where to look for issue.
    I'm a DIY guy and usually do all service myself.
    Plz don't tell me to take it to a "stealership"
     

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    #1 svldvc, May 10, 2022
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    not at all, just get a copy of tech stream to read the codes properly, then grab the service manual at techinfo.toyota.com for troubleshooting
     
    #2 bisco, May 10, 2022
    svldvc likes this.
  3. ChapmanF

    ChapmanF Senior Member

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    Vehicle:
    2010 Prius
    Model:
    IV
    You don't necessarily have to go straight to techinfo.toyota.com for the manuals; there are other options you might like better if they're available in your neck of the woods. We have a wiki page that gathers a bunch of the options in one place.

    Toyota Service Information and Where To Find It | PriusChat
     
    #3 ChapmanF, May 10, 2022
    svldvc likes this.
  4. svldvc

    svldvc Member

    Joined:
    Sep 21, 2010
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    Location:
    Charlotte NC
    Vehicle:
    2014 Prius v wagon
    Model:
    Five
    **SOLUTION**

    I read about every post on this forum with that code.
    Boiled down to checking every fuse. All fuses by driver knee panel were good.

    When I got to the engine bay ones, I discovered that the very far left 7.5Amp fuse labeled as: "ABS MAIN NO. 2" was blown.

    Have no clue what, how and why it had blown.
    Replaced it and immediate as I did so, the break fluid pump (I'm assuming) did its typical pre-start up "whirling" sound that it does every time you step on the break paddle when the car is "off".

    I usually always listen for that sound when I get inside the car and press the break paddle before I hit the "Power/Start" botton. Don't know how I missed that....

    Welp, I'm glad it was a very simple fix.
    Hopefully it will help someone in the future.
     

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    #4 svldvc, May 10, 2022
    bisco likes this.
  5. mr_guy_mann

    mr_guy_mann Senior Member

    Joined:
    Sep 3, 2020
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    Location:
    NJ-USA
    Vehicle:
    2006 Prius
    Model:
    Four
    What app and adapter are you using? It seems that you have decent code scanning capabilties there. So far I my "favorite" (most capable on a Gen2) is the Autel Maxi AP200. I would like to research whatever it is that you are using.

    Posted via the PriusChat mobile app.
     
    #5 mr_guy_mann, May 17, 2022
  6. Tim Jones

    Tim Jones Senior Member

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    Vehicle:
    2011 Nissan LEAF
    Model:
    ----USA----
    I wonder what blew the fuse. My v had over 300,000 on it and that never happened to me.
     
    #6 Tim Jones, Jul 29, 2022
  7. Air_Boss

    Air_Boss Senior Member

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    Vehicle:
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    Model:
    Five
    Now you'll have to determine why that fuse failed, and monitor whether it fails again.
     
    #7 Air_Boss, Jul 29, 2022
  8. Tim Jones

    Tim Jones Senior Member

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    I wonder if the trani Inverter water pump is going bad.
     
    #8 Tim Jones, Jul 29, 2022
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