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Getting code P0A94 on 2011 Prius

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by alfredmusic, Jul 9, 2017.

  1. alfredmusic

    alfredmusic New Member

    Joined:
    Jul 9, 2017
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    Location:
    Riverside CA
    Vehicle:
    2011 Prius
    Model:
    Four
    I bought a used 2011 Prius from the local Toyota dealer 2 1/2 years ago. Just yesterday I was in heavy traffic on a super hot day and tried to accelerate when suddenly I lost power and my dashboard lit up like a Christmas tree. My vehicle then went into limp mode and drove it home. Next day I hooked up to my scanner and it showed the following codes: POA7A, P0A94. I noticed my coolant levels were under the mark so I topped them off and reset codes. Now I just get code P0A94. Tested 12v battery with multimeter and got 12.42. My vehicle is no longer under warranty and everything is pointing to the inverter. The EOE update was done before I purchase the vehicle so getting it swapped out by Toyota is out of the question. I guess my question is what other issues can cause a P0A94 code other than the inverter? Should I change the inverter pump before I spend the big bucks on the inverter? All your help is greatly appreciated.
     
    #1 alfredmusic, Jul 9, 2017
  2. fotomoto

    fotomoto Senior Member

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    With the car in ready mode, check the inverter coolant tank for turbulence and/or feel the hose for flow. If so, the pump is good.
     
    #2 fotomoto, Jul 9, 2017
    bisco and alfredmusic like this.
  3. alfredmusic

    alfredmusic New Member

    Joined:
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    Location:
    Riverside CA
    Vehicle:
    2011 Prius
    Model:
    Four
    Just checked the coolant tank in ready mode and there appears to be no movement at all. Clamped on the hose with my fingertips and cant feel any flow. Looks like the pump might need a changing.
     
    #3 alfredmusic, Jul 9, 2017
  4. alfredmusic

    alfredmusic New Member

    Joined:
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    Location:
    Riverside CA
    Vehicle:
    2011 Prius
    Model:
    Four
    I'll swap the pump out and report back. Thank you for your help!
     
    #4 alfredmusic, Jul 9, 2017
    Raytheeagle likes this.
  5. Lightning Racer

    Lightning Racer Active Member

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    Location:
    Anchorage, Alaska
    Vehicle:
    Other Non-Hybrid
    Model:
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    The inverter is actually still under Warranty Enhancement ZE3 for 15 years and unlimited miles. Toyota will swap out the busted IPM.
     

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    #5 Lightning Racer, Jul 9, 2017
    Mr. F, alfredmusic and bisco like this.
  6. alfredmusic

    alfredmusic New Member

    Joined:
    Jul 9, 2017
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    Location:
    Riverside CA
    Vehicle:
    2011 Prius
    Model:
    Four
    I called the dealer and the lady that answered said my car wasn't covered. SMH... Going to call again 1st thing tomorrow morning. Thanks for the info.
     
    #6 alfredmusic, Jul 10, 2017
  7. rudyjoe

    rudyjoe Junior Member

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    Location:
    Los(t) Angel(e)s
    Vehicle:
    2012 Prius
    Model:
    Two
    I just read your post and i also just posted the same issue myself. Feel free to update me on your outcome please. I have the same problem but my invert. pump shows movement in the res. Not much tho so i will change it out since i have one already. Hope it all worked out for you!
     
    #7 rudyjoe, Sep 14, 2023
  8. ttou68

    ttou68 Active Member

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    Location:
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    Vehicle:
    2010 Prius
    Model:
    III
    Friend of mine's Prius recently shown code P0A94, and it was the IPM need replaced.
    Although dealership said the recall was over but fortunately they did goodwill replacement for him...
    Posted via the PriusChat mobile app.
     
    #8 ttou68, Sep 14, 2023
  9. rudyjoe

    rudyjoe Junior Member

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    Vehicle:
    2012 Prius
    Model:
    Two
    Thanks for that info. I will look into that and see what happens.
     
    #9 rudyjoe, Sep 14, 2023
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