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

2012 Prius V Wagon Issues After Safety Software Update

Discussion in 'Prius v Main Forum' started by hellonearth, Jun 29, 2019.

Tags:
  1. hellonearth

    hellonearth Junior Member

    Joined:
    Sep 21, 2015
    35
    19
    0
    Location:
    USA
    Vehicle:
    2012 Prius v wagon
    Model:
    N/A
    My 2012 Prius V Wagon has been having issues since the safety software update. I first noticed the car selectively (hit or miss) going in EV mode even after driving over 30 miles on the freeway so its not a matter of the engine and or fluids not heating up. The EV light also rarely lights up while before it was fine. It idles a lot without going in EV mode.

    More worrisome is the intermittent acceleration cutting out recently with the warm weather (85F Plus). I have been having scary on and off acceleration issues with the AC on when the car will decide not to accelerate until I turn the AC off even if i floor it. When I turn the AC back on, the car would slow down again. This happens occasionally and usually when the it is quite hot outside.

    Anyone else experienced similar issues or can point me to another thread. I love the car and it only has 92K miles on it but the acceleration cutting out is quite scary and a safety issue especially on the freeway. Thanks!
     
    #1 hellonearth, Jun 29, 2019
    Last edited: Jun 29, 2019
  2. Air_Boss

    Air_Boss Senior Member

    Joined:
    Jun 2, 2012
    4,037
    1,110
    0
    Location:
    New Yawk
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    What software update campaign number are you referring to? Not aware of a “safety” update, though there have been two hybrid system firmware updates since 2016.
     
    #2 Air_Boss, Jun 29, 2019
  3. hellonearth

    hellonearth Junior Member

    Joined:
    Sep 21, 2015
    35
    19
    0
    Location:
    USA
    Vehicle:
    2012 Prius v wagon
    Model:
    N/A
    It is the most recent hybrid system update that supposedly prevents the Prius from stalling. I will try to find the paperwork and post the number
     
    #3 hellonearth, Jun 29, 2019
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,133
    50,050
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    sounds like the inverter diode update to limit accretion to prevent overheating

    clean the battery cooling fan and grille

    check the 12v health

    clean the egr circuit

    check the inverter fluid movement
     
    #4 bisco, Jun 29, 2019
  5. hellonearth

    hellonearth Junior Member

    Joined:
    Sep 21, 2015
    35
    19
    0
    Location:
    USA
    Vehicle:
    2012 Prius v wagon
    Model:
    N/A
    #5 hellonearth, Jul 2, 2019
  6. Air_Boss

    Air_Boss Senior Member

    Joined:
    Jun 2, 2012
    4,037
    1,110
    0
    Location:
    New Yawk
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    That's interesting. Seems to confirm earlier concerns that there may be a long tail on the inverter problem.
     
    #6 Air_Boss, Jul 2, 2019
  7. cnc97

    cnc97 Senior Member

    Joined:
    Mar 13, 2018
    1,422
    1,532
    38
    Location:
    Evansville, IN
    Vehicle:
    2010 Prius
    Model:
    Three
    How many miles have you put on since the software update? Mine acted “differently” for a couple hundred. Then it settled back into what I remembered before the update.
     
    #7 cnc97, Jul 4, 2019
  8. hellonearth

    hellonearth Junior Member

    Joined:
    Sep 21, 2015
    35
    19
    0
    Location:
    USA
    Vehicle:
    2012 Prius v wagon
    Model:
    N/A
    Took it to the stealership where it cost nearly $700 to replace the intake manifold, clean the EGR and replace the spark plugs. He said it was all carboned up and was throwing a lot of codes. I thought price was on the high side but I bit the bullet as we are moving and I needed the car fully functional. Isn't there a TSB or some other warranty on these issues. Mine is a 2012 with 92K miles and I bought it used so not even sure if i would be covered.
     
    #8 hellonearth, Jul 10, 2019
  9. Air_Boss

    Air_Boss Senior Member

    Joined:
    Jun 2, 2012
    4,037
    1,110
    0
    Location:
    New Yawk
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    Were all the inverter TSBs done?
     
    #9 Air_Boss, Jul 10, 2019
  10. hellonearth

    hellonearth Junior Member

    Joined:
    Sep 21, 2015
    35
    19
    0
    Location:
    USA
    Vehicle:
    2012 Prius v wagon
    Model:
    N/A
    Yes
     
    #10 hellonearth, Jul 13, 2019
  11. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,133
    50,050
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    plug your vin into the toyota owners website. it will give you all the warranty recalls. some gen3 had an intake manifold recall
     
    #11 bisco, Jul 13, 2019
  12. Air_Boss

    Air_Boss Senior Member

    Joined:
    Jun 2, 2012
    4,037
    1,110
    0
    Location:
    New Yawk
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    No manifold recall on the v.
     
    #12 Air_Boss, Jul 14, 2019
  13. tommy Wang

    tommy Wang Member

    Joined:
    Dec 18, 2018
    40
    38
    0
    Location:
    industry, CA 91789
    Vehicle:
    2017 Prius v wagon
    Model:
    Four
    i have been at Hybrid pit and notice many of the 3rd gen Prius are going in for EGR cleaning, many of 3rd gens have at least 90K to 100K miles on them and due to the hot weather many of them are experiencing inverter issues. i guess i will be looking forward to that when my car hits the mileage
     
    #13 tommy Wang, Jul 15, 2019
  14. Mambo Dave

    Mambo Dave Active Member

    Joined:
    Jul 5, 2019
    641
    306
    0
    Location:
    33312
    Vehicle:
    2019 Prius
    Model:
    L Eco
    #14 Mambo Dave, Jul 16, 2019
  15. Air_Boss

    Air_Boss Senior Member

    Joined:
    Jun 2, 2012
    4,037
    1,110
    0
    Location:
    New Yawk
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    Quote from a previous article: “Hogan, however, contends Toyota is trying avoid a multibillion-dollar replacement program for the defective inverters.” Hmmm....
     
    #15 Air_Boss, Jul 16, 2019
    Mambo Dave likes this.
(You must log in or sign up to post here.)