Key Fob does not work occasionally

Discussion in 'Gen 2 Prius Main Forum' started by fomenter, Jan 19, 2017.

Tags:
  1. fomenter

    fomenter Junior Member

    Joined:
    Jan 4, 2017
    20
    5
    0
    Location:
    michigan
    Vehicle:
    2007 Prius
    Model:
    N/A
    Hello All,

    I have a 07 Toyota Prius BASE and I'm having issues with both of remote controller. They sometimes do not function at all. When I press button, I don't see the red light (car starts fine, the issue is only for locking and unlocking function). Next morning it works fine so I believe it is an occasional thing. Did anybody have similar experience?

    Thanks
     
    #1 fomenter, Jan 19, 2017
  2. Noobprius

    Noobprius Junior Member

    Joined:
    Jan 15, 2017
    43
    16
    0
    Location:
    US
    Vehicle:
    2006 Prius
    Model:
    II
    Hello, I'm new to this, but my best guess would be the battery is getting low

    Posted via the PriusChat mobile app.
     
    #2 Noobprius, Jan 19, 2017
  3. fomenter

    fomenter Junior Member

    Joined:
    Jan 4, 2017
    20
    5
    0
    Location:
    michigan
    Vehicle:
    2007 Prius
    Model:
    N/A
    12V battery or the battery in key fob?
     
    #3 fomenter, Jan 19, 2017
  4. Sam Spade

    Sam Spade Senior Member

    Joined:
    Dec 3, 2016
    2,036
    1,013
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    That can also be a sign of one or more door lock actuators going bad.
    But I agree that the 12 V battery should be checked.
    And replaced if it is the original one still in there.

    Same thing goes for the batteries in the FOBs.
    If they are more than 3 years old, them might both be going bad too.
     
    #4 Sam Spade, Jan 19, 2017
  5. fomenter

    fomenter Junior Member

    Joined:
    Jan 4, 2017
    20
    5
    0
    Location:
    michigan
    Vehicle:
    2007 Prius
    Model:
    N/A

    Whenever I press lock/unlock button in the car, it locks and unlocks all doors fine all the time

    My question is If 12 V battery is low how come the car starts with no hesitation.

    I just measured the battery and it was 12.1 with the light off and 11.7 with the lights on. Are they good numbers?
     
    #5 fomenter, Jan 19, 2017
    Last edited: Jan 19, 2017
  6. cyberpriusII

    cyberpriusII Prodigyplace says I'm Super Kris

    Joined:
    Oct 1, 2009
    1,050
    1,385
    0
    Location:
    Iowa
    Vehicle:
    2008 Prius
    Model:
    N/A
    12.1 is bad, especially if the car has been run in the past couple of hours. Best check is after it has been off for several hours. Then, I would not be surprised to see it far below 12v

    Toyota Prius: How to Check the 12v Auxiliary Battery Health - PriusDIY.com

    The car can act up once, then be fine for a day, two days or a week or two and then act up again when the 12v is going bad.

    Not something you can rely on to consistently refuse to boot-up when the 12v is having issues.
     
    #6 cyberpriusII, Jan 19, 2017
    Last edited: Jan 19, 2017
  7. Sam Spade

    Sam Spade Senior Member

    Joined:
    Dec 3, 2016
    2,036
    1,013
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    NO.
    That does not prove that is the cause of your FOB problem but the battery needs attention.......including checking the voltage while the car is in READY mode (running).
     
    #7 Sam Spade, Jan 19, 2017
  8. mmmodem

    mmmodem Senior Taste Tester

    Joined:
    Nov 17, 2011
    2,668
    1,643
    0
    Location:
    Bay Area, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Michigan? I'll throw cold in the mix. My remote didn't work well in the cold. Maybe it was low on battery but I had to use the mechanical key to open the door occasionally in Reno. Inside the car, everything worked fine. Back in sunny San Francisco everything worked fine.
     
    #8 mmmodem, Jan 19, 2017
  9. kenoarto

    kenoarto Senior Member

    Joined:
    Feb 7, 2006
    1,404
    389
    0
    Location:
    Chicago, IL
    Vehicle:
    2005 Prius
    Model:
    II
    Start with the least expensive thing first. Fob battery 99 cents.
     
    #9 kenoarto, Jan 19, 2017
    bisco likes this.
  10. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    95,319
    43,208
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    then replace the 12v anyway, it's toast.
     
    #10 bisco, Jan 19, 2017
(You must log in or sign up to post here.)
Loading...
Similar Threads - does occasionally
  1. Ian Simons

    Had my Cat stolen . Does anyone have have spare they are willing to sell? I have 2007 Prius.

    Ian Simons, Jan 7, 2022, in forum: Gen 2 Prius Main Forum
    Replies:
    18
    Views:
    1,580
    Elektroingenieur
    Jan 9, 2022
  2. ski.dive

    I got a code P0420 What does it mean?

    ski.dive, Dec 2, 2021, in forum: Gen 2 Prius Main Forum
    Replies:
    8
    Views:
    1,002
    Frontporch
    Dec 7, 2021
  3. R3PB

    VIN does not show my options package

    R3PB, Sep 15, 2021, in forum: Gen 2 Prius Main Forum
    Replies:
    13
    Views:
    1,173
    Another
    Sep 18, 2021
  4. deegee

    Red Triangle, ABS, VSC, Check Engine, Will not go ready and does not show codes

    deegee, Jul 6, 2021, in forum: Gen 2 Prius Main Forum
    Replies:
    16
    Views:
    2,261
    ChapmanF
    Dec 11, 2021
  5. egg_salad

    Occasional CEL before ICE start, no stored codes

    egg_salad, Aug 29, 2018, in forum: Gen 2 Prius Main Forum
    Replies:
    5
    Views:
    1,002
    JC91006
    Aug 29, 2018