Key not detedted?

Discussion in 'Gen 3 Prius Main Forum' started by Alex Heo, Apr 10, 2021.

  1. Alex Heo

    Alex Heo New Member

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    My car is Prius 3rd 2013. The problem is that sometimes a photo error is displayed on the instrument panel. And the small triangle yellow warning lamp illuminates on the right side. It is irregular, not periodic or repetitive. If I translate Japanese, I think it means that can not find key. The strange thing is that there is no problem when driving alone. It usually occurs when other passengers get on or off the back seat. I don't think it's a problem because there's no battery. What's the problem?
     

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  2. bisco

    bisco cookie crumbler

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    there's no battery?

    there is a fob battery, and a 12v battery
     
  3. Jim Swart

    Jim Swart Member

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    Change your fob battery.
     
  4. Johnny Cakes

    Johnny Cakes Senior Member

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    "I don't think it's a problem because there's no battery" = I don't think the problem is no battery
    (my translation of Kiwi to English).

    But +1 on Jim Swart
     
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  5. fuzzy1

    fuzzy1 Senior Member

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    Is the hatch fully closed? Don't just wiggle it to check. Open, make sure nothing is getting trapped in the latch mechanism, then close it very firmly.

    At least, that is a common Gen3 U.S. problem, and the message tends to appear with bumps in the road, or around corners. Don't ask for the logical connection between the problem and the displayed message, we haven't figured it out.
     
  6. bettergolf

    bettergolf Active Member

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    My 2015 started giving me that key not detected message some time ago and strangely, it ended up being a weak accessory battery (the 12v battery) After I replaced that, I never got the message again. I did replace the keyfob battery first but it didn't stop the warning.
     
  7. Alex Heo

    Alex Heo New Member

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    Oh, thank you. Let's change the 12V battery first.
     
  8. sam spade 2

    sam spade 2 Senior Member

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    While that is not a bad plan, necessarily, a battery for the FOB will be a lot cheaper.
    Do you have two FOBs ?
    Does it do that with both of them ??
     
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  9. bettergolf

    bettergolf Active Member

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    I guess you don't know how to check a 12v battery, so just replace it and see if that works. Duh! I also said I REPLACED THE KEYFOB BATTERY FIRST. Reading is fundamental.
     
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  10. GabrielD

    GabrielD Member

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    Next time, you should try this: (see picture attached)
    I am sure will help you in the future...
     

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  11. Alex Heo

    Alex Heo New Member

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    Yes, the two FOBs, I have are in the same situation.
     
  12. bisco

    bisco cookie crumbler

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    if it's the original 12v, you might as well
     
  13. sLick415

    sLick415 Member

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    Do you keep your fob by your wallet? Credit cards nowadays have RFID chips in them and it can block the signal on your key fob.
     
  14. Johnny Cakes

    Johnny Cakes Senior Member

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    Tough crowd.
     
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