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Installed 2016 engine into 2012 Prius V

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by dhamijad, May 17, 2020.

  1. dhamijad

    dhamijad Junior Member

    Joined:
    May 17, 2020
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    Location:
    Cincinnati, Ohio
    Vehicle:
    2012 Prius v wagon
    Model:
    V
    I installed an engine from a 2016 Toyota Prius into my 2012 Prius. I had some difficulties with EGR and such, but I was able to get everything to fit and it runs well. The reason for my post is that I have a persistent check engine light. I've had a buddy run diagnostics, but he was unable to determine the cause.

    I believe that the 2016 Prius engine may have a different cam shaft profile or some other engine change causing the engine to behave different than what the 2012 ECU is expecting. I would like to know if I am thinking along the right lines here.

    The reason for my thought is that the 2016 engine has a lower HP rating. Also, the older Prius' have overheating issues or oil burning issues, I think. The 2016 engine had improvements made to alleviate these issues. In the process, I expect that the ECU was programmed differently.

    If I am right, then I should be looking into reprogramming the ECU, rather than investigating the vehicle for a defective/faulty part or damaged wiring. Please offer some guidance. Thank you so much for reading!
     
    #1 dhamijad, May 17, 2020
  2. rjparker

    rjparker Tu Humilde Sirviente

    Joined:
    Jun 6, 2008
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    Location:
    Texas Hill Country
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    What codes come up?
     
    #2 rjparker, May 18, 2020
    Elektroingenieur likes this.
  3. ChapmanF

    ChapmanF Senior Member

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    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    What did you end up doing EGR-wise?

    This post might have some connection.
     
    #3 ChapmanF, May 18, 2020
  4. dhamijad

    dhamijad Junior Member

    Joined:
    May 17, 2020
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    Location:
    Cincinnati, Ohio
    Vehicle:
    2012 Prius v wagon
    Model:
    V
    P2196
    C1241

    P2196 / GENERIC
    O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)

    C1241 / GENERIC
    ABS Hydraulic Pressure Differential Switch Input Short Circuit To Ground
     
    #4 dhamijad, May 19, 2020
  5. johnHRP

    johnHRP Active Member

    Joined:
    Aug 6, 2014
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    Location:
    tally, fl
    Vehicle:
    2008 Prius
    Model:
    ----USA----
    C1241 often pops out even when disconnecting the negative terminal 12V battery but too slowly. the ABS module detects a split of second lower than 10V and this C code will stay there although you do not see ABS or check engine lights. It is just enough to cause MOT failed.
     
    #5 johnHRP, Mar 17, 2023
  6. ChapmanF

    ChapmanF Senior Member

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    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    That is the right fortune cookie for P2196 (P2 codes are SAE standardized, so they're pretty safe to google for. The only extra thing to know for the Prius is that the "bank 1 sensor 1" sensor is the A/F ratio sensor.)

    That fortune cookie for C1241 is completely bogus for a Prius. C1 codes are manufacturer defined and can mean completely different things in different makes and even models of car. When you're looking up a manufacturer-defined code in a Prius, only what you find in a Prius repair manual is useful; googling the internet for the same code will get you things that code means in completely different cars.

    [​IMG]

    C1241 in a Prius refers to a problem with the supply voltage arriving at the brake system components.
     
    #6 ChapmanF, Mar 17, 2023
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