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

2012 Prius V misfire

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by PriusHead05, Dec 19, 2021.

  1. PriusHead05

    PriusHead05 Member

    Joined:
    Oct 23, 2020
    289
    85
    0
    Location:
    Florida
    Vehicle:
    2012 Prius
    Model:
    Two
    Started up my '12 Prius V today. It wasn't cold out. About 65 and humid out. (I'm in Florida.) It struggled to start, it was knocking, the idle was all over the place, it acted like it wanted to stall, and it was shaking. No codes, but I definitely could tell it was misfiring. Was like that for about 15 seconds, then smoothed out. Coolant is fine. But I checked the oil, it was dirty and was on the low line. I did the oil change about 5k miles ago. I run the Mobile1 full synthetic 10k mileage oil. Tailpipe wasn't too dirty. Seemed normal. It has 138k miles on it. The EGR pipe was done at 80k. Coolant done at 130k miles. (FYI: At around 120k miles, it would knock upon start-up for about 10 seconds only about twice in the winter. Really hasn't done it since those couple of times. It did give me cylinders 3 and 4 pending code for misfires back then.) I'm thinking about replacing the spark plugs, doing an oil change, and checking the PVC valve and hose. Any suggestions?
     
    #1 PriusHead05, Dec 19, 2021
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,762
    48,974
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    'thinking about replacing the plugs' they weren't done at 120k?

    was the whole egr circuit cleaned? does she burn any oil?
     
    #2 bisco, Dec 19, 2021
    Mendel Leisk likes this.
  3. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,703
    38,240
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    What do you mean by "pipe"? The red circled item:

    upload_2021-12-19_6-22-40.png

    is commonly referred to here as the EGR "pipe". It is only a small portion of what needs thorough cleaning, which should encompass the EGR cooler/valve, and the intake manifold (yellow highlighted).

    Did you do the cleaning yourself?

    Engine coolant should have been done at 100K, but not likely a factor.
     
    #3 Mendel Leisk, Dec 19, 2021
  4. PriusHead05

    PriusHead05 Member

    Joined:
    Oct 23, 2020
    289
    85
    0
    Location:
    Florida
    Vehicle:
    2012 Prius
    Model:
    Two
    Well, I know the spark plugs definitely need to be done, that's for sure, because no, they weren't done at 120k. From what I can tell from the Toyota record, the EGR was replaced, and the rest of the system cleaned. It burns a little bit. Usually about a half a quart every 5k miles.
     
    #4 PriusHead05, Dec 19, 2021
    bisco likes this.
  5. PriusHead05

    PriusHead05 Member

    Joined:
    Oct 23, 2020
    289
    85
    0
    Location:
    Florida
    Vehicle:
    2012 Prius
    Model:
    Two
    It was done by Toyota before I owned it.
     
    #5 PriusHead05, Dec 19, 2021
  6. PriusHead05

    PriusHead05 Member

    Joined:
    Oct 23, 2020
    289
    85
    0
    Location:
    Florida
    Vehicle:
    2012 Prius
    Model:
    Two
    I have owned it since about 100k miles.
     
    #6 PriusHead05, Dec 19, 2021
  7. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,703
    38,240
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Do you mind a little DIY?
     
    #7 Mendel Leisk, Dec 19, 2021
  8. PriusHead05

    PriusHead05 Member

    Joined:
    Oct 23, 2020
    289
    85
    0
    Location:
    Florida
    Vehicle:
    2012 Prius
    Model:
    Two
    No. I have torn down an engine all the way down to the heads and block (on a V8), so I'm not afraid. I usually like doing things myself to save money.
     
    #8 PriusHead05, Dec 19, 2021
  9. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,762
    48,974
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    start with the low hanging fruit, mendel will guide you
     
    #9 bisco, Dec 19, 2021
  10. jzchen

    jzchen Newbie!

    Joined:
    Apr 9, 2012
    3,296
    1,006
    0
    Location:
    Arcadia, CA
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    Deleted...
     
    #10 jzchen, Dec 19, 2021
  11. farmecologist

    farmecologist Senior Member

    Joined:
    Jun 25, 2015
    1,946
    1,785
    0
    Location:
    Southern MN
    Vehicle:
    2012 Prius v wagon
    Model:
    II

    And pray to Odin that it isn't the head gasket. (y)
     
    #11 farmecologist, Dec 19, 2021
  12. jzchen

    jzchen Newbie!

    Joined:
    Apr 9, 2012
    3,296
    1,006
    0
    Location:
    Arcadia, CA
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    Oops this could be the T-SB. Can disregard my prior post... (Sorry).

    REVVL V+ 5G ?
     
    #12 jzchen, Dec 19, 2021
  13. PriusHead05

    PriusHead05 Member

    Joined:
    Oct 23, 2020
    289
    85
    0
    Location:
    Florida
    Vehicle:
    2012 Prius
    Model:
    Two
    The previous owner was not DIY. I am DIY friendly.
     
    #13 PriusHead05, Dec 19, 2021
    jzchen likes this.
  14. rjparker

    rjparker Tu Humilde Sirviente

    Joined:
    Jun 6, 2008
    7,597
    4,454
    7
    Location:
    Texas Hill Country
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    Borescope
     
    #14 rjparker, Dec 19, 2021
  15. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,703
    38,240
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Check out the first link in my signature, has some EGR cleaning info/links. (y)

    In particular, @NutzAboutBolts videos 16, 17 and 24, linked here:

    Nutz About Bolts Prius Maintenance Videos | PriusChat

    cover pretty much everything.

    Do read my suggestions regarding coolant in the first link in my signature*. There's really no need to spill ANY; with a few tactics that can be avoided. In the videos there's a lot of (ineffective) clamping of coolant lines. In some cases it's not even necessary to pull off coolant lines (at the throttle body), and with the EGR cooler, a preemptive 2 quart drain of coolant (at the radiator) will drop the level below all the EGR components. You can subsequently pour the drained coolant back into the reservoir.

    (* If you're on a phone, the signatures typically don't display in portrait orientation, but hopefully will if you turn it to landscape.)
     
    #15 Mendel Leisk, Dec 19, 2021
    Last edited: Dec 19, 2021
(You must log in or sign up to post here.)