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

High pitched beep at start

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by siouxscout, Sep 28, 2014.

  1. siouxscout

    siouxscout New Member

    Joined:
    Sep 28, 2014
    4
    0
    0
    Location:
    knoxville, tn
    Vehicle:
    2009 Prius
    Model:
    N/A
    Hello everyone I've searched for this issue and haven't found a thing.

    There is a high pitched beep when I start my 2009 prius(with 101k miles), but there are no warning lights on the dash. So im not sure what could be causing it. I did notice the aux battery is only showing 10v on the diagnostic screen. So ill replace that soon. But that shouldnt cause the beep right? Also i say its high pitched because it is compared to the seat belt beep for example. But so far no other i
     
    #1 siouxscout, Sep 28, 2014
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,200
    6,472
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    Start by replacing the 12V battery. When voltage is abnormally low, some weird behavior can result.
     
    #2 Patrick Wong, Sep 28, 2014
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    108,693
    49,392
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    and do it before you get stranded somewhere. welcome to priuschat!(y)
     
    #3 bisco, Sep 28, 2014
  4. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    7,631
    3,849
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    Yes, change the battery and it will probably resolve the beeping issue.

    I have had the car beep as you describe due to low 12 V battery issues, so I'd say yes definitely it can cause the beep. I found the beep coincides with the red triangle flashing, which I have interpreted to mean low (12V) voltage detected.
     
    #4 dolj, Sep 28, 2014
    Last edited: Sep 29, 2014
  5. dirtpimp

    dirtpimp Junior Member

    Joined:
    Jan 18, 2011
    19
    7
    0
    Location:
    SoCal
    Vehicle:
    2009 Prius
    Model:
    II
    I get this same beep only when I shut off the car. Went away when I changed the battery on my remote. Same year car with 112k miles.
     
    #5 dirtpimp, Sep 29, 2014
(You must log in or sign up to post here.)