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Check Hybrid System, P0A0F / P2111

Discussion in 'Prius c Technical Discussion' started by Zradub, Sep 6, 2024 at 2:17 PM.

  1. Zradub

    Zradub Junior Member

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    My new to me 2016 102k mi C got this yesterday:


    Check Hybrid System, P0A0F / P2111

    is it the tb or it’s sensors or maybe a Maf or fuel pump?
     
    #1 Zradub, Sep 6, 2024 at 2:17 PM
  2. bisco

    bisco cookie crumbler

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    YES
     
    #2 bisco, Sep 6, 2024 at 4:03 PM
  3. ChapmanF

    ChapmanF Senior Member

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    It's not going to be MAF or fuel pump, or anything besides the throttle body, throttle position sensor, or the wires thereto.

    The code tells you the ECM wanted the throttle to close but did not see the position sensor showing it closing.
     
    #3 ChapmanF, Sep 6, 2024 at 4:10 PM
  4. Zradub

    Zradub Junior Member

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    So is first step to simply clean the throttle body? If that doesn’t work how do I test the TPS or TB itself?
     
    #4 Zradub, Sep 6, 2024 at 4:44 PM
  5. ChapmanF

    ChapmanF Senior Member

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    Cleaning the throttle body won't hurt, I guess, but might not lead directly to any insight into why it wasn't seen closing when the ECM wanted it to.

    A good scan tool should be able to pull up the freeze frame from when the P2111 code was set, and show just what the position sensor readings were at that moment. There may also be active tests where you can command a specific throttle position and see the position reading.

    There should be a whole recommended troubleshooting procedure in the section for P2111 in the repair manual:

    Toyota Service Information and Where To Find It | PriusChat
     
    #5 ChapmanF, Sep 6, 2024 at 4:56 PM
    Brian1954 likes this.
  6. Zradub

    Zradub Junior Member

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    Which scan tool or hopefully apps can show me these freeze moments. I used car scanner to find the fault codes yesterday. It was an app I downloaded yesterday so I am not sure everything it does.
     
    #6 Zradub, Sep 7, 2024 at 12:07 PM
  7. Zradub

    Zradub Junior Member

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    Just cleaned TB (And MAF since I had both CRC sprays handy). Did nothing. Ordering both the TB and TPS now. No time to play for stuff. $350 and should be fixed. Pretty upset that even newer Prius’s break on me. This is my 5th. Might go back to high powered ICE cars. Sigh. My V and 3 will be for sale soon. Both top packages including Tech pkg on the 3. Did you know it actually self-steers a little. It’s fun to play with. Like a toddler learning to walk. It wanders a little and then right before it’s over its head it yells audibly. Pretty cool. Anyway I’ll update when the new parts come in.
     
    #7 Zradub, Sep 7, 2024 at 3:11 PM
  8. ChapmanF

    ChapmanF Senior Member

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    It's those times when someone says "no time to play for stuff" that they often end up replacing $350 worth of parts and still having the problem, and then looking for the wiring issue they didn't have time to look for up front.
     
    #8 ChapmanF, Sep 7, 2024 at 3:58 PM
  9. Zradub

    Zradub Junior Member

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    Why would I have a wiring issue if the car hasn’t sat in a barn full of mice etc?
    And you, yourself, said it’s the TB or TBS… , but now apparently can be other things? Cmon. I have 7 cars, some nice and all have broken this summer I’m pretty upset. Headgaskets, transmissions, etc…
    Sigh. $350 is now seems like a kids meal at McD after being gouged for other stuff.
     
    #9 Zradub, Sep 7, 2024 at 8:36 PM
  10. Brian1954

    Brian1954 Active Member

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    From post 3.
     
    #10 Brian1954, Sep 7, 2024 at 8:46 PM
    Last edited: Sep 7, 2024 at 9:08 PM
  11. Brian1954

    Brian1954 Active Member

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    See this thread: https://priuschat.com/index.php?posts/3290690
     
    #11 Brian1954, Sep 7, 2024 at 8:57 PM
  12. ChapmanF

    ChapmanF Senior Member

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    "or anything besides the throttle body, throttle position sensor, or the wires thereto."

    There is no computer in a car that has psychic powers or any way to give you a code that tells you more than what the computer has physical ways to find out. The computer's outputs are connected to the throttle body by wires, and the throttle position sensor is connected to the computer by wires, so when the computer says "my outputs should have made the throttle close but my inputs did not show it closing", the wires are inescapably part of the picture.
     
    #12 ChapmanF, Sep 7, 2024 at 10:20 PM
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