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Key Not Detected

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by JGC61, Mar 27, 2013.

  1. JGC61

    JGC61 Active Member

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    Vehicle:
    2021 Prius Prime
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    Limited
    While driving the key not detected message appeared three different times during a 50 mile trip.
    The message lasted approx. 30 seconds.
    Any answers.
    Thanks
     
    #1 JGC61, Mar 27, 2013
  2. ursle

    ursle Gas miser

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    The most popular answer is the rear hatch isn't closed properly and the (light)toggle switch is engaging over bumps or around turns, another possibility is the fob's battery is weak.
     
    #2 ursle, Mar 27, 2013
  3. jdenenberg

    jdenenberg EE Professor

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    Put your FOB into the slot in the dash. If the problem goes away, replace the FOB battery.

    JeffD
     
    #3 jdenenberg, Mar 27, 2013
  4. jdcollins5

    jdcollins5 Senior Member

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    The 2010 does not have the slot in the dash, assuming the OP's profile is correct. You have to hold the fob up to the power button.
     
    #4 jdcollins5, Mar 27, 2013
  5. Tande

    Tande Active Member

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    By any chance, you don't happen to have an "FOB" from another "Toyota" vehicle, in your pocket, do ya?.......been/there done/that.......FWIW
     
    #5 Tande, Mar 27, 2013
    3TE likes this.
  6. retired4999

    retired4999 Prius driver since 2005

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    +1 Yes that happens!
     
    #6 retired4999, Mar 27, 2013
  7. 3TE

    3TE Junior Member

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    +1 for the FOB battery. Even though it still works intermittently there is a chance the voltage drop due to sitting in sunlight may trigger the warning.
     
    #7 3TE, Mar 28, 2013
  8. David Beale

    David Beale Senior Member

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    Yup, it's most likely the FOB battery. It's now old enough. The other answers are also possible, but the FOB battery is now old enough to be nearly dead, and the continued "checking" of it while in the car is probably drawing it below the threshold of the "key not detected" message.
     
    #8 David Beale, Mar 31, 2013
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