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Misfire, white smoke from exhaust, lose coolant, P148f +?

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Mohammad Seyyednezhad, Mar 10, 2019.

  1. Mohammad Seyyednezhad

    Mohammad Seyyednezhad Junior Member

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    Misfire, white smoke from exhaust, lose coolant, P148f +?
    I've solved the problem. The Prius uses a system to heat the coolant quickly when it is cold. If this system works poorly it boils in the coolant then it increases the pressure in the cooling system. The symptoms are similar to poor cylinder head.
     
    #1 Mohammad Seyyednezhad, Mar 10, 2019
  2. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

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    Can you be more specific about what part you found faulty and how you fixed it please.
     
    #2 mikefocke, Mar 10, 2019
  3. Mendel Leisk

    Mendel Leisk Senior Member

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    Any lights on dash, say check engine light? Also, how many miles on it?
     
    #3 Mendel Leisk, Mar 10, 2019
  4. Mohammad Seyyednezhad

    Mohammad Seyyednezhad Junior Member

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    2014 prius v 410000 km , Ijust cut the system . I took out the hose from the egr cooler directly connected to the heater core radiator in the ac.
     

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    #4 Mohammad Seyyednezhad, Mar 11, 2019
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  5. Mohammad Seyyednezhad

    Mohammad Seyyednezhad Junior Member

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    looks like the error is back. Replaced water pump and thermostat, egr valve and egr cooler replaced old injectors. The new water pump (Asian) behaves differently than the old one. It appears that when the engine gets hot, the coolant boils.
     
    #5 Mohammad Seyyednezhad, Mar 16, 2019
  6. Lesk_The_Glut

    Lesk_The_Glut Junior Member

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    What was your ultimate fix?
     
    #6 Lesk_The_Glut, May 10, 2019
  7. johnHRP

    johnHRP Active Member

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    Not EGR coolar but hear exchanger after the catalytic converter
     
    #7 johnHRP, Feb 9, 2022
  8. ChapmanF

    ChapmanF Senior Member

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    That item includes a thermostat that redirects the exhaust flow after it's warm enough, so perhaps an issue with that could cause problems.

    The thing about this thread, though, is that the original poster was last heard from in March of 2019 ... and that post was to say that the post #1 idea about what fixed the problem had not, in fact, fixed it.
     
    #8 ChapmanF, Feb 9, 2022
  9. Mohammad Seyyednezhad

    Mohammad Seyyednezhad Junior Member

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    It was head gasket that failed. If boiling in the coolant then do not spend time on other things go straight on it.
     
    #9 Mohammad Seyyednezhad, Feb 12, 2022
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  10. Tim Jones

    Tim Jones Senior Member

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    HG again.... thanks toy
     
    #10 Tim Jones, Feb 13, 2022
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