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2013 Prius Won't Come out of Park - P0A09

Discussion in 'Prius v Technical Discussion' started by Tom Dufek, Oct 23, 2020.

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  1. Tom Dufek

    Tom Dufek New Member

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    Hi everyone. New to the forum, but glad I found it.

    We have a 2013 Prius that is having some issues.

    When we turn the car on the message "Check Hybrid System. Park In a Safe Place" is displayed. We can shift in to neutral and that is it.

    We had it towed to the dealer and the code thrown are
    - P0A09
    - C1241
    - C1259
    - C1310

    About 4 months ago we had the Power Transistor for the power inverter replaced under a recall.

    The dealer is telling us this new issues is not related to this and they need to replace the Power Management ECU for $1200 and that this might not fix the issue but would be the first place to start.

    Wondering if this sounds right as something seems off in the answers we are getting from the dealer. Car is at 110K miles and we were considering replacing it in the next 12 months. Concerned about dropping $1200 in to a car at this stage and it not even fixing the issue.
     
    #1 Tom Dufek, Oct 23, 2020
  2. Tim Jones

    Tim Jones Senior Member

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    Yikes...! I haven't heard of this one... another reason I tell people not to purchase a used Gen 3 especially with over 100,00 miles. When something goes wrong you realize how screwed you are. I know I've been there. Hopefully somebody else will chime in...
     
    #2 Tim Jones, Oct 24, 2020
  3. bisco

    bisco cookie crumbler

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    i suspect the dealer is mistaken. the warranty repair sometimes fails again. escalate this to toyota corporate. you will find the number in the warranty booklet
     
    #3 bisco, Oct 24, 2020
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  4. Tom Dufek

    Tom Dufek New Member

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    That was my gut instinct too. Just to confirm, you think they are mistaken because that code has to do with the Power Transistor for the Power inverter that was already replaced. Is that correct?
     
    #4 Tom Dufek, Oct 24, 2020
  5. Tim Jones

    Tim Jones Senior Member

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    What is that picture of????
     
    #5 Tim Jones, Oct 24, 2020
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  6. bisco

    bisco cookie crumbler

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    that's our covid social distancing exterior barn movie theatre.

    first get together is tomorrow for football, 50 degrees f. 100" projector screen, 2 propane heaters and a fire pit.:D
    (it will get more interesting as the temp drops :eek:)
     
    #6 bisco, Oct 24, 2020
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  7. cnc97

    cnc97 Senior Member

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    Google the diagnostic tree for the P0A09 code. The other codes are just companion codes that show up when the hybrid ECU has an issue.

    If that checks out, the inverter has failed. This should be handled by Toyota. I suspect an inverter failure AFTER recall fix has been applied.
     
    #7 cnc97, Oct 24, 2020
  8. Raytheeagle

    Raytheeagle Senior Member

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    If you only lived somewhere warmer, the outdoor experience could last longer;).

    But a nice setup given the circumstances(y).
     
    #8 Raytheeagle, Oct 24, 2020
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  9. cnc97

    cnc97 Senior Member

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    I found the link, but it won’t copy here. It’s basically a voltage check on a specified pin on the ECU, and a resistance check on the wiring between two pins on the harness. If those pass, it’s the inverter.
     
    #9 cnc97, Oct 24, 2020
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  10. bisco

    bisco cookie crumbler

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    <sigh>
     
    #10 bisco, Oct 24, 2020
  11. ChapmanF

    ChapmanF Senior Member

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    Do you have the INF code to go with that P0A09? There are a couple different ones; one has to do with the NODD line and the other with the VLO line. It would be frustrating out there with a multimeter chasing the wrong thing.

    Also, you'll probably want to skim the section in the manual for P0A08-264 even though that's not the code you have, because that's where the diagrams and circuit theory are for the converter operation and the NODD and VLO circuits.
     
    #11 ChapmanF, Oct 24, 2020
  12. Tim Jones

    Tim Jones Senior Member

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    (y)
    79 and sunny here tomorrow........(y)
     
    #12 Tim Jones, Oct 24, 2020
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  13. bisco

    bisco cookie crumbler

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    <sigh>
     
    #13 bisco, Oct 24, 2020
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  14. Raytheeagle

    Raytheeagle Senior Member

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    Next year I'll augment the rest of the backyard with some more entertainment areas;).

    But at least the artificial grass is done:):

    01F8152E-81D2-420E-A21C-5A7C23D0625E.jpeg 6CAA9044-EE57-4593-BFAE-5263765E1ABB.jpeg

    Right at the cusp of still keeping it open at 70 F today(y).
     
    #14 Raytheeagle, Oct 24, 2020
  15. Tom Dufek

    Tom Dufek New Member

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    I do not. Those were just the ones that the dealer gave me. Both the NODD and the VLO are related to the inverter though correct? Their diagnosis of a failed Power Management ECU seems off.
     
    #15 Tom Dufek, Oct 24, 2020
  16. Tom Dufek

    Tom Dufek New Member

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    Awesome. I'll give this a look and see if i can get a pass on the ECU.
     
    #16 Tom Dufek, Oct 24, 2020
  17. ChapmanF

    ChapmanF Senior Member

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    Both NODD and VLO are circuits through which the Power Management Control ECU controls and monitors the DC/DC converter.
     
    #17 ChapmanF, Oct 25, 2020
  18. Tom Dufek

    Tom Dufek New Member

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    Got it. So since those circuits are running through the PMC ECU that is likely what is leading the dealer to suggest replacing it. Is it common (or alternatively, unusual) for this particular ECU to fail?
     
    #18 Tom Dufek, Oct 25, 2020
  19. Tim Jones

    Tim Jones Senior Member

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    I would get a used ECU if that's it.... plenty of them out there for the hatchback. It might need to be flashed...I don't know. That's about the only thing that hasn't went out on my v.
    Do you have a v? It just says a Five in you bio..... The v and the hatchback use different computers.
    Engine Computers for 2013 Toyota Prius for sale | eBay
     
    #19 Tim Jones, Oct 26, 2020
  20. Tom Dufek

    Tom Dufek New Member

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    Yep. It's a hatchback.
     
    #20 Tom Dufek, Oct 26, 2020
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