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Another 12v issue

Discussion in 'Gen 2 Prius Technical Discussion' started by Char92dj8, Feb 24, 2020.

  1. Char92dj8

    Char92dj8 Junior Member

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    So, the car in question is a 2008, the 12v battery is only about a month old. Got in the car this morning and headed to work, half way there i notice check engine light came on but the car felt no different so i kept going. After work, car started right up, check engine light stayed on, i got home and shut it off. Came back out about 15 min later with my scanner to pull some codes and the car had zero power whatsoever. Is it the 12v again?
     
    #1 Char92dj8, Feb 24, 2020
  2. bisco

    bisco cookie crumbler

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    i wouldn't think it is the cause, but may be the victim. you really have to find out what that check engine code is
     
    #2 bisco, Feb 24, 2020
  3. TMR-JWAP

    TMR-JWAP Senior Member

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    Best way to tell would be voltage checks on the battery and checking for loose connections...even better if you have a battery tester or can take it to a place that has one.
     
    #3 TMR-JWAP, Feb 24, 2020
  4. Char92dj8

    Char92dj8 Junior Member

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    Update: took the battery to autozone and the battery came.but good but almost completely dead. What cpuld cUse the battery to drain so quickly?
     
    #4 Char92dj8, Feb 25, 2020
  5. spdracrm3

    spdracrm3 Member

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    Your code might be related to the fact that it might not be charging the 12v battery thru the hybrid system. or something big is staying on. Why was battery recently replaced?
    SM-G960U ?
     
    #5 spdracrm3, Feb 25, 2020
  6. valde3

    valde3 Senior Member

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    Check the voltage when Prius is in ready. You can even do that with MFD if you don't have a meter. If it's changing perhaps you have a parasitic draw.
     
    #6 valde3, Feb 25, 2020
  7. Char92dj8

    Char92dj8 Junior Member

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    15828416699281261814786167971720.jpg Update: 12v battery refused to charge so the the "auto techs" at autozone replaced it. Car came back to life, only to have a coil burn up and almost catch fire. This prius is cursed!
     
    #7 Char92dj8, Feb 27, 2020
    Last edited: Feb 27, 2020
  8. Priuslover09

    Priuslover09 Member

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    I hate when the Prius have problems
     
    #8 Priuslover09, Feb 27, 2020
  9. TMR-JWAP

    TMR-JWAP Senior Member

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    I must say....I've never seen one do that before. I've seen the old style coils do similar stuff when they go bad and swell, but it never even crossed my mind for a COP. I guess in the big scheme of things, a coil is a coil.
     
    #9 TMR-JWAP, Feb 27, 2020
  10. Priuslover09

    Priuslover09 Member

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    I have before back in 2010 when I got the car the 12v was bad after a week of having it took back to Toyota for a 12v swap in 09 Prius!
     
    #10 Priuslover09, Feb 27, 2020
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