HV battery draining almost instantly when car started

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Bryanesk, Aug 7, 2022.

  1. Bryanesk

    Bryanesk Junior Member

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    Hello I’ve recently been having trouble getting even just 40+ MPG in the past I was able to get 40-42 without doing any pulse and glide with bad tread tires I now have two front new tires and am constantly pulse and gliding and am struggling to keep good MPG anytime I press the gas even just a lil my current MPG goes to 15-25
     
    #1 Bryanesk, Aug 7, 2022
  2. Bryanesk

    Bryanesk Junior Member

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    this is all from within a 45 sec time frame is this normal?
    531C7961-C0E5-42CB-979D-A76A9835D689.jpeg
     

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    #2 Bryanesk, Aug 7, 2022
  3. Tombukt2

    Tombukt2 Senior Member

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    Well it's a Gen2 so even an 09 is coming on the 20 age wise . That's a pretty old battery . All my problems like this went away with new battery from Toyota. All of em . Might be worth considering . I've never been below 45. With ok battery . When the battery fan started running all the time in the back and the voltage on the display kept going from green to blue to magenta very quickly The battery got changed within 2 weeks of that starting and when the battery was changed it went right back up to 45 plus miles per gallon just from changing the battery so it's something to consider it 20 plus years old and a generation 2.
     
    #3 Tombukt2, Aug 8, 2022
  4. edthefox5

    edthefox5 Senior Member

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    Very little info and your video will not play. Most likely you have a failing hybrid battery.

    On a G2 they all are failing it’s just age. And where you live it’s a miracle no one has stolen your cat.

    Hundreds of posts about bad battery and stolen cats on this site.
     
    #4 edthefox5, Aug 8, 2022
  5. alftoy

    alftoy Senior Member

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    #5 alftoy, Aug 8, 2022
  6. Bryanesk

    Bryanesk Junior Member

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    I have a refurbished one from a year ago but really wow I usually got 40+ before facing this problem I’ll def look into it
     
    #6 Bryanesk, Aug 8, 2022
  7. Bryanesk

    Bryanesk Junior Member

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    For some reason the site won’t let me post the video so I just got screenshots of it I got a refurbished battery a year ago and I have a cat shield had an aftermarket one stolen at work and insurances ended up paying for a oem one so I think I won in the end haha
     
    #7 Bryanesk, Aug 8, 2022
  8. bisco

    bisco cookie crumbler

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    what tires and pressures? who installed them? any other work? how many miles on her?
     
    #8 bisco, Aug 8, 2022
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