Power button unresponsive in hot weather

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by DrowningInteger, Jun 23, 2025 at 11:32 PM.

  1. DrowningInteger

    DrowningInteger New Member

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    Howdy y'all. I have a 2006 Prius with 143k miles, and it doesn't want to start in hot weather. I see the door light on the dash but nothing else comes on when I push the power button. No instrument cluster, no MFD, no noises. Is there a good place to start for troubleshooting? The hybrid battery and 12v battery are less than a year old. The 12v battery is currently showing 12.3v on my multimeter. Disconnecting the 12v battery for a few minutes will allow the car to start after hooking it back up.
     
    #1 DrowningInteger, Jun 23, 2025 at 11:32 PM
  2. Tombukt2

    Tombukt2 Senior Member

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    And when the car starts after hooking up the battery then do you have displays speed trans and gas,?????
     
    #2 Tombukt2, Jun 24, 2025 at 9:15 AM
  3. DrowningInteger

    DrowningInteger New Member

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    Yes, when it's working everything comes on and functions normally.
     
    #3 DrowningInteger, Jun 24, 2025 at 10:20 AM
  4. JC91006

    JC91006 Senior Member

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    You probably have a problem with your combination meter. The dash lights not turning on.
     
    #4 JC91006, Jun 24, 2025 at 11:08 AM
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  5. DrowningInteger

    DrowningInteger New Member

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    That's what I thought too, but I didn't think the combo meter prevented the car from starting and driving.
     
    #5 DrowningInteger, Jun 24, 2025 at 12:06 PM
  6. JC91006

    JC91006 Senior Member

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    I think your car started, just you couldn't see any dash lights. You can try and press the start button and wait 10 seconds, see if the car turns on.
     
    #6 JC91006, Jun 24, 2025 at 3:51 PM
  7. Tombukt2

    Tombukt2 Senior Member

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    It doesn't . Sometimes to start hold button till ya see check lite let go of button and drive.
     
    #7 Tombukt2, Jun 24, 2025 at 5:30 PM
  8. JC91006

    JC91006 Senior Member

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    if he can't see his fuel level, he might be out of gas
     
    #8 JC91006, Jun 24, 2025 at 5:33 PM
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