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P0301 second time….

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by refusedone, Aug 24, 2024 at 1:17 PM.

  1. refusedone

    refusedone Junior Member

    Joined:
    Jul 25, 2022
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    Location:
    los angeles
    Vehicle:
    2010 Prius
    Model:
    Three
    Hi all,
    I have a 2010 Prius with 200k+ miles on it. About a year ago I got the P0301, cylinder 1 misfire. The Spark plug was fouled, so I replaced all the plugs and the coils to be safe. I have recently gotten the code again, with knocking at start up.

    The engine does burn a lot of oil. I’m seeing also the thread about the intake manifold possibly being an issue?

    This time the spark plug is not fouled, I cleaned it anyway and still knocking at startup. Any ideas of what to try next would be greatly appreciated, thanks!

    PS, I do have Techstream will that likely help me determine the issue more precisely?
     
    #1 refusedone, Aug 24, 2024 at 1:17 PM
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
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    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    The fire in your cylinder is being put out by seepage from the head gasket more than likely Very common in this FXE version of the two Z engine so maybe give that a look with a boriscope or something
     
    #2 Tombukt2, Aug 24, 2024 at 3:40 PM
    refusedone likes this.
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