2022 Prius, Prius Prime Safety Recall 21TA07

Discussion in 'Gen 4 Prius Main Forum' started by FuriousPrius, Sep 26, 2021.

  1. FuriousPrius

    FuriousPrius New Member

    Joined:
    Aug 29, 2021
    8
    1
    0
    Location:
    Texas
    Vehicle:
    2022 Prius
    Model:
    LE
    Hi all, this showed up on my Toyota Connect app for my 2022 Prius. I'm actually quite surprised this showed up for 2022, considering this may be one of the last of the Gen 4 models and would have serious issues worked out. In this case, apparently there's a condition where incorrect reading of sensor information can cause the ECU to shutdown the hybrid system mid drive. Anyone have more info on this? "21TA07" is not pulling up any other info online for it so it seems to be a brand new recall notice.

    upload_2021-9-26_9-27-25.png
     

    Attached Files:

  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    94,225
    42,713
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
  3. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    14,277
    10,081
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Come on, man, saying that is like when somebody tags onto a thread where some warning lights were on and says "hey I have the exact same problem!" because the same lights were on.

    There was a past recall I knew about where a power transistor failing happened to trigger the ECU to call for a shutdown.

    There was a later one where the firmware had been changed to not shut down when the transistor failed ... but in certain driving conditions, after the transistor failed, a key voltage would rise and the ECU would say "hey, that voltage is above limits!" and call for a shutdown.

    This one seems to be about the shifter position: if you happen to be moving the shifter at the exact moment the ECU wants to know what the position is, it can conclude the position sensor is faulty, and call for a shutdown.

    (I don't know more details, but in the generations I know about, the shifter sends two redundant signals, so if the ECU hasn't converted both from analog to digital at the same instant, I could see this happening.)

    So there have been different issues over the years that all could lead, in their own ways, to an unexpected shutdown, but it doesn't seem like lumping them together as "this problem off and on" will help anybody's understanding.
     
  4. Ravegg

    Ravegg New Member

    Joined:
    Oct 13, 2021
    1
    0
    0
    Location:
    Los Angeles
    Vehicle:
    2022 Prius
    Model:
    LE
    Just joined the forum. I just found and bought a new 2022 Prius Hybrid LE and the day I completed the sale the recall came out. I did not know it at the time and put about 700 miles on the car the first weekend I bought it. The car drives great and I am happy I picked the Prius over the Ioniq I also test drove. I am happy with the car and hoping the fix comes out in November.
     
Loading...