P0301

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Justin Cummings, Mar 19, 2023.

  1. Justin Cummings

    Justin Cummings Junior Member

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    2013 Prius 4. I cleaned the intake manifold, and replaced the gasket. I replaced the EGR valve and tried to clean the cooler, cleaned the EGR pipe to the IM. Oil looks good, No smoke, No fluid loss. Still getting P0301. Changed the spark plugs. Error went away and then came back. Shutters a low speed... you know "that" sound. Any ideas other than a head gasket?

    TIA


    Justin
     
    #1 Justin Cummings, Mar 19, 2023
  2. Mendel Leisk

    Mendel Leisk Patron saint of newly poured sidewalks

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    What’s the miles?

    try swapping the coil/plug on cyl one with four, see if the code follows.

    once the head gasket starts letting go, all the EGR cleaning won’t turn back the clock.
     
    #2 Mendel Leisk, Mar 19, 2023
  3. Tim Jones

    Tim Jones Senior Member

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    #3 Tim Jones, Mar 20, 2023
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  4. Justin Cummings

    Justin Cummings Junior Member

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    Ok I'll try tomorrow and see. It has 253,000 miles :D
     
    #4 Justin Cummings, Mar 21, 2023
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  5. Justin Cummings

    Justin Cummings Junior Member

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    looks like I may be losing coolant afterall. I swapped the coil/plug on cyl one with four and the code went away, but there is a p0301 pending, so it's probably a blown head gasket. I used a borescope and looked at cylinder 1 and it was not steam cleaned. It had all carbon on it. it was all black.
     
    #5 Justin Cummings, Mar 25, 2023
  6. Brian1954

    Brian1954 Member

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    Look at cylinder #2 and tell us what you see.

    Posted via the PriusChat mobile app.
     
    #6 Brian1954, Mar 25, 2023
  7. Brian1954

    Brian1954 Member

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    Duplicate post.
     
    #7 Brian1954, Mar 25, 2023
  8. Justin Cummings

    Justin Cummings Junior Member

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    I've already put it all back together. but I took it for another driver and got 0300,0301,0302
     
    #8 Justin Cummings, Mar 25, 2023
  9. Justin Cummings

    Justin Cummings Junior Member

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    I don’t get it. This morning it is running like a new car no CEL. No death rattle, no shutter. WTH??
     
    #9 Justin Cummings, Mar 26, 2023
  10. rjparker

    rjparker Tu Humilde Sirviente

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    Typical of a head gasket. They start slow and sometimes can be weeks or even months between rattles. But its kind of like cancer, you have a chance the save the patient if aggressive work is done early. Later it will be engine time, which it may need anyway at 253k if any oil leaks or burns. New rings are recommended if you wait for an engine. A rebuilt head even with a simpler gasket job.

    Give it one more cold start rattle. Just don't use chemo, it will clog up your arteries.
     
    #10 rjparker, Mar 27, 2023
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