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Prius blown motor swap permanent code issue

Discussion in 'Gen 3 Prius Main Forum' started by TL Phillips, Mar 3, 2022.

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  1. TL Phillips

    TL Phillips New Member

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    I have a 2010 Prius 243K on it and my daughter drove it home from a two hour trip the engine through a rod or broke a piston around cylinder 3 most likely hydro locked have not disassembled it yet. (I know "Prius Head Gasket Death" she didn't let me know it had a morning death rattle until the engine died. Kids.

    I purchased a engine with 43K and swapped it.

    The problem is the 2010 Prius will not start the engine because of permanent codes and thinks the old blown engine is still in the car.

    The are permanent Codes I can not clear with my old scan tool are:
    P3190 (Poor engine power), P0101 (MAF Sensor) and P0303 (Cylinder 3 is were the old engine is damaged). Dash displays "Check Hybrid System"
    I think the blow engine managed to turn on all the warning lights on the dash,

    I tried disconnect the battery trick and wait an hour to clear code didn't work.

    Anyone know a trick to clear these codes without a scan code. The ECM must have a code memory and thinks the old engine is installed still.

    Also anyone know of a low cost (cheap priced) scan tool that can clear Permanent DTC?

    Thank you in advance for your help!

    priusblock.jpg Prius__engine.png IMG_20220302_192800353.png IMG_20220302_192755190.png
     
    #1 TL Phillips, Mar 3, 2022
  2. xliderider

    xliderider Senior Member

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    Don't know about permanent codes, but often it takes about 10 cycles of the Power button to clear the Check Hybrid System error once the error condition is fixed.



    Posted via the PriusChat mobile app.
     
    #2 xliderider, Mar 3, 2022
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  3. TL Phillips

    TL Phillips New Member

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    So I need to try start the car ten times over...

    I just hold the break and on/off the start button 10 times?

    Is that how I should try to do it times 10?

    It's 3am here I will try it in the morning.

    Thank you for your help
     
    #3 TL Phillips, Mar 3, 2022
  4. ChapmanF

    ChapmanF Senior Member

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    "Permanent" codes are called that because you do not get any shortcut to clearing them. Once you've repaired the car and you're driving it, each permanent code will go away as soon as its corresponding monitor test in the control module runs, and convinces itself that the problem was fixed.

    If you are in a hurry for the permanent codes to go away, you can look them up in the repair manual (more infp), and for each permanent code that you have, you will find a "confirmation driving pattern" shown. There can be a different pattern for each code, which will be a certain pattern you can drive that should be sure to trigger the monitor test for that code, so the ECM will notice the problem was fixed.

    A lot of the confirmation patterns will include something called a "universal trip", which is defined one time, earlier in the manual.
     
    #4 ChapmanF, Mar 3, 2022
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  5. TL Phillips

    TL Phillips New Member

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    The problem is after the engine swap the 2010 Prius Base Model will not start the engine or turn it over. It's not going anywhere yet :(

    Am I correct a low hybrid battery causes a no start?
    (My car dash shows the battery at 1 bar after driving it home on EV)

    Thank you for the help
     
    #5 TL Phillips, Mar 3, 2022
  6. ChapmanF

    ChapmanF Senior Member

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    Do you have a scan tool that can show you the traction battery state of charge? (The dash bars show a zoomed-in range of the middle of the state-of-charge range. A scan tool can show the actual SoC.)

    From things I've read, it is somewhere below about 20% SoC where the ECU says "nope, not trying to start."

    What are you scanning your trouble codes with? Perhaps it is not showing all the codes you have. The ones you have listed, as far as I remember, do not prevent trying to start.
     
    #6 ChapmanF, Mar 3, 2022
  7. xliderider

    xliderider Senior Member

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    Yes


    Posted via the PriusChat mobile app.
     
    #7 xliderider, Mar 3, 2022
  8. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Not sure about that.
     
    #8 Mendel Leisk, Mar 3, 2022
  9. 2010moneypit?

    2010moneypit? Active Member

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    It sounds like your hybrid battery is too depleted to try to start the car. The Prius uses the Hybrid Battery to start the car.
     
    #9 2010moneypit?, Mar 3, 2022
  10. 2010moneypit?

    2010moneypit? Active Member

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    Would be best to get a scan tool to check status of hybrid battery.
     
    #10 2010moneypit?, Mar 3, 2022
  11. ASRDogman

    ASRDogman Senior Member

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    Where are you located? Maybe someone have a Prolong charger that could install their
    harness and charge your battery up...

     
    #11 ASRDogman, Mar 3, 2022
  12. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Dealerships can bring in a special charger I think, for depleted but (hopefully) viable batteries. Might have you paying through the nose though. Worth a phone call?
     
    #12 Mendel Leisk, Mar 3, 2022
  13. TL Phillips

    TL Phillips New Member

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    -=-=-Issue Solved-=-=-

    I feel really dumb but my 2010 Prius new engine runs and drives great now.

    The hybrid battery orange disconnect switch thingy was the issue.
    I forgot it has to be slide in to connect the battery not just snapped in.
    Hours of frustration and aggravation but it runs now and I know I'll never make this mistake again.
     
    #13 TL Phillips, Mar 3, 2022
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  14. ASRDogman

    ASRDogman Senior Member

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    We've ALL done stuff like that before. And certain to do it again! (y)
     
    #14 ASRDogman, Mar 4, 2022
  15. TL Phillips

    TL Phillips New Member

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    I promise as long as I'm on this planet I will never forget to do that again!

    :)
     
    #15 TL Phillips, Mar 4, 2022
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  16. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Maybe that switch HAD to be thus, but even so: the joker that designed it left a legacy of confusion.
     
    #16 Mendel Leisk, Mar 4, 2022
  17. TL Phillips

    TL Phillips New Member

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    You are so correct! He defiantly left legacy of confusion.
     
    #17 TL Phillips, Mar 4, 2022
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  18. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Like that typo lol.
     
    #18 Mendel Leisk, Mar 4, 2022
  19. ChapmanF

    ChapmanF Senior Member

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    In addition to the legacy of confusion, that switch also leaves a P0A0D code, so if a person is using a scan tool that is able to show the codes from the power management control ECU, then seeing that code leads straight to "oh yeah, I didn't get that switch fully home" and problem solved in one.
     
    #19 ChapmanF, Mar 4, 2022
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