Prius goes back to IG-ON after I shut off. Help me figure it out.

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by danimelara, Jun 9, 2016.

  1. danimelara

    danimelara Junior Member

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    Vehicle:
    2006 Prius
    In the last week the prius has been acting weird.

    I have a 2006 155k miles prius

    It only happens after I drive the car for while.

    The problem is that everytime I shut off the car, the dash board lights come back up (ig-on mode). I have to press the button again to completely shut it off.

    weird.

    I changed the 12v battery less than 6 months ago and I checked the battery using the MDF and it seems fine. Always above 12v even with the lights on. Although I have to tell you that I checked the 12v battery right after a 30 min drive.

    what do you guys think?
     
    #1 danimelara, Jun 9, 2016
  2. JC91006

    JC91006 Senior Member

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    Has this car ever been in an accident or have a Salvage title? Do you put the car in "Park" before shutting down?
     
    #2 JC91006, Jun 9, 2016
  3. bisco

    bisco cookie crumbler

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    maybe it's a defective power button, but i would recheck the battery at the jump point under the hood after everything has been off for a few hours.
     
    #3 bisco, Jun 9, 2016
  4. danimelara

    danimelara Junior Member

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    So, It turned out to be the 12v battery.

    Anything less than optimal state of this 12v battery and the prius starts acting super funny.

    I am glad it wasn't something else though.

    Thanks to those that contributed.
     
    #4 danimelara, Jun 20, 2016
    bisco likes this.
  5. bisco

    bisco cookie crumbler

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    batteries have a couple different checkpoints. cold voltage is one, and can range from 13.0 (new) down to the low 12's. but even a battery that measures okay when cold, may have serious drawdown issues.

    did they replace it for free?
     
    #5 bisco, Jun 20, 2016
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