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2005 Prius car loses all electric then resets

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Taz0523, Aug 21, 2018.

  1. Taz0523

    Taz0523 New Member

    Joined:
    Jul 10, 2018
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    Location:
    Norwalk, CA
    Vehicle:
    2005 Prius
    Model:
    Two
    My 2005 Prius will lose all electric then will reset as if I disconnected and reconnected the battery. Then all dashlights come on but no codes. When I park, it'll lose electric again but then reset. The battery diagnostic shows 12.4 v in accessory then 13+ while running. Help.
     
    #1 Taz0523, Aug 21, 2018
  2. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
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    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    Have you checked the 12 V aux battery in the back? Check all the connections (12 V positive, 12 V negative and where the negative connects to the car body) are clean and tight.

    Sounds like you might have a loose connection. Has anybody been doing any work back there recently?
     
    #2 dolj, Aug 22, 2018
  3. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
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    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    If you reset the systems by disconnecting the 12v battery, and the lights return, there are codes there, your scanner can’t read them;).

    Who is scanning the car for codes?

    What scanner are they using?

    Since you are in So Cal, have you tried an independent shop?

    What does the car do when the lights are displayed on the dash?

    Are any of the lights flashing?

    Good luck and keep us posted (y).
     
    #3 Raytheeagle, Aug 22, 2018
  4. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
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    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    This.

    Remove, clean and reconnect the main battery cables AT BOTH ENDS.

    It is possible to have a bad connection INSIDE the battery too.
     
    #4 sam spade 2, Aug 22, 2018
  5. ericbecky

    ericbecky Hybrid Battery Hero

    Joined:
    Mar 12, 2004
    4,365
    3,209
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    Location:
    Madison, Wisconsin
    Vehicle:
    2005 Prius
    Model:
    Two
    Check the conntions at the battery posts and the bolt where the negative cable connects to the car body. Make sure all are tight.
     
    #5 ericbecky, Aug 22, 2018
  6. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how many miles on her?
     
    #6 bisco, Aug 22, 2018
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