Key Not Detected, assuming short

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by amtx, May 4, 2026 at 12:40 PM.

  1. amtx

    amtx New Member

    Joined:
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    Location:
    texas
    Vehicle:
    2010 Prius
    Model:
    III
    2010 w/ 117k miles. Light comes on while car is running, not moving, in D or P, and a door closes from someone getting in/out. Have checked to ensure gate fully closed, replaced FOB battery. The 12V adapter in cig outlet is unchanged/unmoved for cell charging with same phone, only a cord was replaced. Assuming there is a short or loose wire because it happens with door closing. 12V battery is about a year old and no other electrical issues. Keys stay on flat part of accessory/storage area while driving.

    Is there any way to narrow this down to FOB vs car better before hitting the dealership?
     
    #1 amtx, May 4, 2026 at 12:40 PM
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
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    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    Car ever been in a wreck or damaged there are antenna . That detect fobs. Fob's can go bad. You could have a locksmith scan you're immo system . Some of these newer scanners will pinpoint breaks antenna issues etc . Might be cheaper than the dealer you're going to drive it to the locksmith so no service call he just walks out his backdoor with the scanner
     
    #2 Tombukt2, May 5, 2026 at 1:29 PM
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    maybe the door switch
     
    #3 bisco, May 5, 2026 at 6:14 PM
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