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key battery low

Discussion in 'Gen III 2010+ Prius Main Forum' started by chip_designer, Oct 22, 2012.

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  1. chip_designer

    chip_designer New Member

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    Your Vehicle Year:
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    Model:
    IV
    everytime I finish driving, and turn off the car, I get "key battery low" beep and on display message

    any ideas?
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Must resist, must resist..., oh heck:

    Change the battery?
    felix mizioznikov and ftl like this.
  3. gliderman

    gliderman Active Member

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    Wow! Same thing happened to me today. But I changed my battery about two months ago for the second time since Sept 2009.

    I have been driving around running errands today and it only happened on my first stop. Checked out the battery when I got home and it is full strength.

    I hope my fob isnt going bad.

    Anyone had FOB failures on 2010?
  4. xliderider

    xliderider Senior Member

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    Change the battery, and even if the battery dies completely, you can supposedly hold the fob directly next to the Start button and it should work.
  5. mad-dog-one

    mad-dog-one Prius Enthusiast

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    Mail your FOB to me, along with $99.99 cash and I'll do a complete refurb and return the FOB to you, as good as new. :)
  6. David Beale

    David Beale Senior Member

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    If you put the FOB in your pocket along with your cell phone it may do this. Or there may be other things interfering with the FOB. Such as military comms.
  7. chip_designer

    chip_designer New Member

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    what a relief. I never thought the key battery warning is the key I carry with me. I thought key battery low = "some KEY component of the battery system is low" which I was thinking it should be in the drivetrain warranty
  8. pjksr02

    pjksr02 Member

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    A-ha! You've blown your cover, you dealer service department!
  9. bisco

    bisco cookie crumbler

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    which 'other non hybrid' are you driving?
  10. stream

    stream Senior Member

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    :D
  11. dmvp

    dmvp Member

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    Is it possible that your other FOB is also in the vehicle? I had the warning, changed my battery...and it took a few drives to make the warning go away. A week or so later I saw the warning again, but also realized my husband had his FOB along as well...so we changed his battery too. No warning since.
  12. gliderman

    gliderman Active Member

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    No, extra FOB tacked on bulletin board in office. It was the first time I have seen that warning and it is still a mystery to me. There may have been some interference, but I cant think of any other reason. I hope the FOB is not going out. Battery is fine and enclosure is sealed.
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