1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Key not detedted?

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

  1. Alex Heo

    Alex Heo New Member

    Joined:
    Apr 10, 2021
    3
    0
    0
    Location:
    New Zealand Aucland
    Vehicle:
    2013 Prius
    Model:
    N/A
    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?
     

    Attached Files:

  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,571
    48,862
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    there's no battery?

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

    Jim Swart Member

    Joined:
    Oct 18, 2014
    49
    37
    0
    Location:
    Portland, OR
    Vehicle:
    2013 Prius
    Model:
    Persona
    Change your fob battery.
     
  4. Johnny Cakes

    Johnny Cakes Senior Member

    Joined:
    Dec 30, 2016
    994
    755
    2
    Location:
    Virginia, USA
    Vehicle:
    2015 Prius
    Model:
    Five
    "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
     
    bisco likes this.
  5. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    17,039
    10,013
    90
    Location:
    Western Washington
    Vehicle:
    Other Hybrid
    Model:
    N/A
    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

    Joined:
    Jan 8, 2019
    403
    331
    0
    Location:
    Sanford NC
    Vehicle:
    2015 Prius
    Model:
    Two
    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

    Joined:
    Apr 10, 2021
    3
    0
    0
    Location:
    New Zealand Aucland
    Vehicle:
    2013 Prius
    Model:
    N/A
    Oh, thank you. Let's change the 12V battery first.
     
  8. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    7,035
    2,780
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    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 ??
     
    Jim Swart likes this.
  9. bettergolf

    bettergolf Active Member

    Joined:
    Jan 8, 2019
    403
    331
    0
    Location:
    Sanford NC
    Vehicle:
    2015 Prius
    Model:
    Two
    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.
     
    Grit likes this.
  10. GabrielD

    GabrielD Member

    Joined:
    Oct 18, 2019
    179
    71
    0
    Location:
    Romania
    Vehicle:
    2014 Prius+ MPV
    Model:
    V

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

    Attached Files:

    • 222.jpg
      222.jpg
      File size:
      64.4 KB
      Views:
      0
  11. Alex Heo

    Alex Heo New Member

    Joined:
    Apr 10, 2021
    3
    0
    0
    Location:
    New Zealand Aucland
    Vehicle:
    2013 Prius
    Model:
    N/A
    Yes, the two FOBs, I have are in the same situation.
     
  12. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,571
    48,862
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    if it's the original 12v, you might as well
     
  13. sLick415

    sLick415 Member

    Joined:
    Apr 30, 2012
    214
    55
    0
    Location:
    San Francisco, CA
    Vehicle:
    2012 Prius
    Model:
    Three
    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

    Joined:
    Dec 30, 2016
    994
    755
    2
    Location:
    Virginia, USA
    Vehicle:
    2015 Prius
    Model:
    Five
    Tough crowd.
     
    Paul E. Highway and Hybrid Ron like this.