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2008 Prius won't start- BRAND NEW battery

Discussion in 'Newbie Forum' started by ashily22, Jan 15, 2019.

  1. ashily22

    ashily22 New Member

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    I'm a newbie to owning a Prius and I've had it only a few months. The 12V battery died so my mechanic put in a new one YESTERDAY. It ran fine on the way home, showed fully charged. Got up this morning and it wouldn't start. I wasn't able to unlock with the smart key, but the engine light came on and the power button turned from green to red. HELP!
     
    #1 ashily22, Jan 15, 2019
  2. bisco

    bisco cookie crumbler

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    welcome!
    how do you know it's charged? the meter on the dash is for the hybrid drive battery, not the 12v

    how many miles on her?

    if the engine light came on, you need to have the trouble codes read
     
    #2 bisco, Jan 15, 2019
  3. bisco

    bisco cookie crumbler

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    does your mechanic know anything about hybrids?
     
    #3 bisco, Jan 15, 2019
  4. JC91006

    JC91006 Senior Member

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    Try starting the car with the keyfob inserted into the dash slot. You might just have a bad keyfob battery
     
    #4 JC91006, Jan 15, 2019
  5. 2k1Toaster

    2k1Toaster Brand New Prius Batteries

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    How did the 12v "show fully charged"? What visual aid did you use to come to that conclusion, because there isn't one in the Prius. The absolute best you can do is look at the textual output of the voltage on a diagnostic screen, or read it back via the OBDII port and as anyone will tell you, voltage on a lead acid battery will not tell you state of charge.

    It is also very common for brand new 12v batteries to be nearly fully discharged when pulled off the shelf. They were manufactured a year ago, sat on a shelf in some warehouse draining, was bought by a local distributor, sat on a shelf, then you bought it.
     
    #5 2k1Toaster, Jan 15, 2019
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  6. ashily22

    ashily22 New Member

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    I was told by a mechanic that the code read as the 12V being fully charged. I'm not really sure he knew what he was talking about either. I took it to a new place under warranty to get the battery checked again. I assume the battery they gave me is not good.
     
    #6 ashily22, Jan 16, 2019
    Data Daedalus likes this.
  7. 2k1Toaster

    2k1Toaster Brand New Prius Batteries

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    Yeah, that's not a thing.
     
    #7 2k1Toaster, Jan 21, 2019
    Data Daedalus likes this.
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