1. Attachments are working again! Check out this thread for more details and to report any other bugs.

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

    Joined:
    Jun 14, 2017
    38
    6
    0
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    V
    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

    Joined:
    May 11, 2005
    109,452
    49,756
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    YES
     
    #2 bisco, Sep 6, 2024 at 4:03 PM
  3. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    24,532
    15,955
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    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

    Joined:
    Jun 14, 2017
    38
    6
    0
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    V
    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

    Joined:
    Mar 30, 2008
    24,532
    15,955
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    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

    Joined:
    Jun 14, 2017
    38
    6
    0
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    V
    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

    Joined:
    Jun 14, 2017
    38
    6
    0
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    V
    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

    Joined:
    Mar 30, 2008
    24,532
    15,955
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    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
(You must log in or sign up to post here.)