2012 Prius all lights on issue

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by JimJ2018, Nov 7, 2018.

  1. JimJ2018

    JimJ2018 New Member

    Joined:
    Nov 7, 2018
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    Location:
    Colorado
    Vehicle:
    2012 Prius
    Model:
    Three
    IMG_2439.jpg
    Hi Guys,

    I have a 2012 Prius and only put 29000 mileage on it. Driving was fine till a couple of days ago, cold started the car the next day morning and saw all lights were on and car was not ready. Turned it off and waited for a couple of mins before turning it back on again, the same. After tried a couple of times the car was eventually turned on. Then the car was driving like normal for some days. Today, I was cold starting the car again from home and the problem came back. I have already scheduled a dealer visit but have concern if the car runs fine in the dealer given the problem is sporadic so they can't replicate the problem, then there will be no fix. Hope some one here can give me a clue what I am dealing with. Thank you for any input.
     
  2. tankyuong

    tankyuong Senior Member

    Joined:
    Nov 9, 2012
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    Location:
    Central MO
    Vehicle:
    2012 Prius c
    Model:
    II
    Sounds like you didn’t press the brakes hard enough before pressing the start button
     
    Raytheeagle likes this.
  3. xliderider

    xliderider Senior Member

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    Location:
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    Vehicle:
    2011 Prius
    Model:
    Three
    Another possibility is that the brake pedal sensor switch is intermittently not working properly.

    Posted via the PriusChat mobile app.
     
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  4. Eddy Connelly

    Eddy Connelly Member

    Joined:
    Oct 14, 2015
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    Location:
    New York
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    I'd second that it's running in accessory mode. What color is the light on your On switch when this happens?
     
  5. Usle

    Usle Member

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    Location:
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    Vehicle:
    2018 Prius Prime
    Model:
    Plug-in Advanced
    The brake sensor switch sounds posible, also, I'd trickle chqrge the 12v battery overnight to see if it's possibly a weak or bad 12v battery, 6-7 years is a possibly used up battery.
     
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