Looking to confirm 12v battery dead, plus question about noise when parked

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Patrick E, Mar 24, 2020.

  1. Patrick E

    Patrick E New Member

    Joined:
    Mar 24, 2020
    2
    0
    0
    Location:
    Carlsbad, CA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    Hello,

    So our 2012 Prius V had been slow to start. It'd just sit for a minute before dash lit up. Now there's nothing, no reaction to fob. Assuming 12v battery is dead. I've found a good DIY video to replace it, and the proper battery on Amazon. Any issues? I know the dealer charges a lot.

    Second, the now "dead' car makes a low mechanical noise, like a hum/whir, in front of the driver side when parked. Any clue?

    Searched "noise when off", but didn't find anything similar to what I'm hearing.

    Thanks for any feedback.
     
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    86,388
    38,285
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    hard to say without testing, but if it's original, go ahead and replace it. oem is around $200.

    on line, if it needs a charge, you will need a charger.

    not sure what the noise is, replace the battery and see what happens
     
  3. lrisius

    lrisius Member

    Joined:
    Aug 23, 2015
    88
    28
    0
    Location:
    Illinois
    Vehicle:
    2015 Prius v wagon
    Model:
    Three
    Does it start when you open the driver's door? On our 2015 v, the brake booster kicks in when I open the door and runs for maybe 10-15 seconds.
     
  4. JimboPalmer

    JimboPalmer Tsar of all the Rushers

    Joined:
    Apr 14, 2009
    12,065
    6,357
    1
    Location:
    Greenwood MS USA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    The Prius is never really off, there are a number of tests it does while 'off'
     
  5. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

    Joined:
    Oct 17, 2010
    38,430
    27,220
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
  6. Patrick E

    Patrick E New Member

    Joined:
    Mar 24, 2020
    2
    0
    0
    Location:
    Carlsbad, CA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    Tried this. Some lights came on, the door open light, check engine. The car hummed like a humpback whale, as if the whale was shifting gears. That was new. No start though. Thanks!

    learning more about this. Thanks!

    Gonna give the battery a try. Thanks!
     
    #6 Patrick E, Mar 25, 2020
    Last edited by a moderator: Mar 26, 2020
Loading...