2009 Prius won't start, check engine light is only light that shows.

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Daughter, Sep 30, 2016.

  1. Daughter

    Daughter Junior Member

    Joined:
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    Location:
    Northern Virginia
    Vehicle:
    2009 Prius
    Model:
    ----USA----
    So I got into my car as normal today, and upon depressing the brake and starting the car, I noticed all the lights/warnings lit up on the dash and then all but the check engine light went away, and the car failed to start. I then turn the car off, and tried again, only to see that the check engine light would turn on. It looks like the power-locks aren't functioning either. It's clear to me that one of the batteries are dead. Can someone tell me what course of action I need to take?
     
    #1 Daughter, Sep 30, 2016
  2. JC91006

    JC91006 Senior Member

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    II
    Change your 12v battery
     
    #2 JC91006, Sep 30, 2016
  3. andrewclaus

    andrewclaus Active Member

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    Location:
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    Any idea how old the 12V battery is?

    How many miles are on the car?
     
    #3 andrewclaus, Sep 30, 2016
  4. Daughter

    Daughter Junior Member

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    Vehicle:
    2009 Prius
    Model:
    ----USA----
    It's got to be at least 13 months old, since that's how long I've had the car. It has ~110,000 miles.
     
    #4 Daughter, Sep 30, 2016
  5. exstudent

    exstudent Senior Member

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    If previous owner(s) never replaced the 12V battery, 2016 minus 2009 = 7years old, at least.
     
    #5 exstudent, Sep 30, 2016
  6. bisco

    bisco cookie crumbler

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    put a digital volt meter on the jump post under the hood, after it has been off for a few hours. the battery has a date code on top.
     
    #6 bisco, Sep 30, 2016
  7. cyberpriusII

    cyberpriusII Prodigyplace says I'm Super Kris

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    #7 cyberpriusII, Sep 30, 2016
  8. WilDavis

    WilDavis Senior Member

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    Vehicle:
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    Model:
    II
    Welcome to PriusChat! From your description it sounds like the 12V Aux-Battery is about to, or already has failed. I had the same symptoms about 9 months ago with my 2009 Gen II (~106,000 miles at the time) - (dimmed interior lights, SKS system starting to get flakey, dash lighting up like a Yule-tree) - changed 12V battery (first one since new) - problem fixed (~$200 from dealer (including warranty)) - Good luck! - Wil
     
    #8 WilDavis, Sep 30, 2016
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