2009 Won't Start. No lights. 12v good. Ideas?

Discussion in 'Gen 2 Prius Technical Discussion' started by jrdamien, Jan 3, 2020.

  1. jrdamien

    jrdamien Junior Member

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    Hello all. I have an '09. Recently it sat for 5 days and when I went to start it nothing at all happened. No interior or external lights. Nothing. I can jump it fine and when I do it starts and runs. But if I turn it off it will no start again. In maintenance mode the 12v battery has a 13.9 steady charge. No error codes. OBD shows nothing.

    Any ideas? Thank you!
     
  2. SFO

    SFO Senior Member

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    Sounds like you need a new 12v.

    When was the last time it was replaced?

    How many hours per week in the vehicle driven?

    How long have you owned it, and how many miles does it have?
     
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  3. jrdamien

    jrdamien Junior Member

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    Even with a good reading?

    I have no idea how long it's been since it has been replaced. I bought it used 3 years ago. I drive it 15 to 30 hours a week. It has 160k.
     
  4. SFO

    SFO Senior Member

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    Yes, even with the vehicle running and charging the battery at 13.9v you could still have a bad 12v battery.

    But you can double check by testing the voltage with a voltmeter when the vehicle is off.

    Batteries don't last forever, and yours could still be the original from the factory.

    Which OBD2 device are you using to scan for DTCs ?
     
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  5. bisco

    bisco cookie crumbler

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    13.9 volts is the inverter, not the battery
     
  6. jrdamien

    jrdamien Junior Member

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    A Goliath. Discontinued.
     
  7. jrdamien

    jrdamien Junior Member

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    That makes sense. I'll put a MM on it.
     
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