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p0a94 p0ac4. Stalls at higher speeds, fine on local roads. Need help

Discussion in 'Gen 3 Prius Technical Discussion' started by BDGuy, Jul 18, 2019.

  1. BDGuy

    BDGuy New Member

    Joined:
    Jul 18, 2019
    1
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    Location:
    New York
    Vehicle:
    2010 Prius
    Model:
    N/A
    My prius performs fine expect weird problem happening only at higher speeds, usually anywhere over 50 MPH.
    Engine shuts off, I get check engine,hybrid system kicks in and I have to immediately drive into shoulder lane to turn it OFF and then then back ON in order to drive way.
    This problem never happens in the city driving conditions. Codes would disappear after day or two unless I go onto highway again.
    p0a94
    p0ac4
     
    #1 BDGuy, Jul 18, 2019
  2. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,963
    4,442
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    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    When the hybrid powertrain starts failing the first symptoms often do tend to appear primarily at freeway speeds. Also sometimes the error codes from a problem in the hybrid battery pack can first show up as error readings in the inverter / powertrain... How would you like to proceed? Are you looking for a good price on mechanic to do the work, or do you want to do the work yourself?
     
    #2 PriusCamper, Jul 18, 2019
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    108,036
    49,113
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how many miles on her?

    what are you reading the codes with?

    did you get the inverter recall done?

    is there movement in the fluid reservoir?

    have you checked the 12v health?
     
    #3 bisco, Jul 18, 2019
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