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

Keyfob battery low?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by tagnew, Jan 31, 2013.

  1. tagnew

    tagnew Junior Member

    Joined:
    Sep 16, 2006
    15
    0
    0
    I have a puzzle...my 2010 IV 12volt battery went dead a few days ago. Drove 100 miles the day before, didn't leave anything on, but dead as can be next day. Charged the battery in the rear, took the charge normally, then took it to the dealer, they checked the battery 3 times, all ok. Now when I go to start the car, the display shows "keyfob battery low". So I tested it, moving progressively farther back and operating the door lock/unlock function. Seems to have perfectly good range. Question is: what's going on?
     
    #1 tagnew, Jan 31, 2013
  2. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,690
    39,236
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Our 2010 started displaying the low fob battery, about 2 years post-purchase. Again, seemed to be working ok, apart from the warning. So, could just be coincidence.

    I replaced the batteries in both fobs, figuring it was time.
     
    #2 Mendel Leisk, Jan 31, 2013
  3. ucsmfu

    ucsmfu Senior Member

    Joined:
    Sep 21, 2011
    1,498
    420
    0
    Location:
    canada
    Vehicle:
    2010 Prius
    Model:
    V
    i had the same problem, replaced a new battery and 2 weeks later got the msg saying the low fob battery. But I took the battery out and tested it and it has 100% health. I swaped back to the old one, and it worked fine.

    Anyone know what the problem is ?

    thanks !!
     
    #3 ucsmfu, Jan 31, 2013
  4. adamace1

    adamace1 Senior Member

    Joined:
    Jun 22, 2009
    1,403
    192
    0
    Location:
    Charlotte, NC
    Vehicle:
    2010 Prius
    Model:
    II
    I just got this warning today. Bought ner key fob batterys. They lasted 3.5 years
     
    #4 adamace1, Feb 2, 2013
  5. ucsmfu

    ucsmfu Senior Member

    Joined:
    Sep 21, 2011
    1,498
    420
    0
    Location:
    canada
    Vehicle:
    2010 Prius
    Model:
    V
    where did you buy the batteries from ?
     
    #5 ucsmfu, Feb 2, 2013
  6. PaJa

    PaJa Senior member

    Joined:
    Sep 3, 2009
    678
    113
    92
    Location:
    Czech republic
    Vehicle:
    2017 Prius
    Model:
    N/A
    I replaced my keyfob battery as well after 3+ years reliable service and almost daily usage. I simply bought Energizer lithium CR1632 from local electronic DIY shop.
     
    #6 PaJa, Feb 2, 2013
  7. adamace1

    adamace1 Senior Member

    Joined:
    Jun 22, 2009
    1,403
    192
    0
    Location:
    Charlotte, NC
    Vehicle:
    2010 Prius
    Model:
    II
    Well i went to the Toyota dealer to get filter and oil to do my oil change and when i shut the car off in their parking lot it gave me the low key fob battery message. I didn't feel like another stop so i just bought them with my oil change stuff.
     
    #7 adamace1, Feb 2, 2013
(You must log in or sign up to post here.)