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Need help with the key

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Aung, Jul 29, 2021.

  1. Aung

    Aung New Member

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    2010 Prius
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    Three
    My key suddenly stopped working. I replaced the battery and can see the little red light flashing. I can't unlock or lock the door. Car beep when i turn off the car and open the door. It flashes the lock red symbol. I can turn on and turn off the car. There is no " no key detected warning"
     
    #1 Aung, Jul 29, 2021
  2. RRxing

    RRxing Senior Member

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    Sounds like the key is working just fine except for locking/unlocking the door. Try disconnecting the negative terminal on the 12V battery for a few minutes, reconnect, and try it again.
     
    #2 RRxing, Jul 30, 2021
  3. dig4dirt

    dig4dirt MoonGlow

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    Buttons may be stuck?
    open back up and put back together
     
    #3 dig4dirt, Jul 30, 2021
  4. tankyuong

    tankyuong Senior Member

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    Chey12v battery
     
    #4 tankyuong, Jul 30, 2021
  5. Aung

    Aung New Member

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    How do i go about doing that?
     
    #5 Aung, Jul 30, 2021
  6. Aung

    Aung New Member

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    I opened it and put it back together. That not it
     
    #6 Aung, Jul 30, 2021
  7. privilege

    privilege Active Member

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    I'm just commenting so I can find the cause/effect later.

    key fob
     
    #7 privilege, Jul 30, 2021
  8. dig4dirt

    dig4dirt MoonGlow

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    Two
    key fob buttons were worth a try!

    the 12v battery is in the back hatch.
    Open hatch and on the side there is compartment lid to open.
    Use an adjustable wrench to loosen the clamp on the battery,
    put a bag or something around that detached cable so it does not touch/connect back to battery.
    wait 5 mins
    reconnect the cable to the post and tighten.
    Do not let cable touch anything and if you have metal wrench, do not short out by touching both posts.
     
    #8 dig4dirt, Jul 30, 2021
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