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PO 174

Discussion in '4th Gen 4Runners (2003-2009)' started by another-bill, Mar 25, 2018.

  1. Mar 25, 2018 at 11:16 AM
    #1
    another-bill

    another-bill [OP] New Member

    Joined:
    Mar 24, 2018
    Member:
    #5716
    Messages:
    14
    Gender:
    Male
    First Name:
    Bill
    Vehicle:
    2005 Gold 4Runner SR5 V8
    Weather Tech mats! lol
    New member here and a new 4Runner owner.

    So, I bought a 2005 V-8 4.7 4Runner SR5 2WD with 157,000 miles. A few days afterwards it starts showing the check engine light along with the VSC/TC lights. I run the code and get PO174.

    I replaced the air filter and MAF, nothing. Replaced the PCV and gas cap, nothing.

    Took it to a shop I trust and they smoke tested it which showed it needed the PCV hose, intake manifold gasket set, fuel injector O-ring and fuel injector cushion ring-lower which were all changed and 10 miles later I am again getting PO171 & PO174.

    ETA, the shop tested the fuel pressure and it was within spec.

    The only thing I can guess is the O2 sensors?



    Any ideas?
     
  2. Jun 24, 2020 at 4:03 AM
    #2
    captsolo

    captsolo New Member

    Joined:
    Jun 2, 2019
    Member:
    #10131
    Messages:
    365
    Gender:
    Male
    First Name:
    Tom
    nassau bahamas
    Vehicle:
    2005 SR5
    How does it run?
     
  3. Jun 24, 2020 at 2:57 PM
    #3
    captsolo

    captsolo New Member

    Joined:
    Jun 2, 2019
    Member:
    #10131
    Messages:
    365
    Gender:
    Male
    First Name:
    Tom
    nassau bahamas
    Vehicle:
    2005 SR5
    Find a better mechanic!

    My 2005 with 150,000 miles runs like a top (new), and has never been worked on except for oil and filter every 4000 miles, 4 starters (replaced in my driveway for $60 to mechanic). Starters $100 at Amazon.com OK.

    Original water pump, alternator, tranny (fluid and filter once at 105,000 miles at dealer), all original exhaust (this amazes me).

    4runner has never thrown a "code" on the dash in 15 years.

    Long life Coolant change D/F (10 quarts) in the driveway once at 100,000 miles by owner. I think 4runner holds 10 quarts of Zerex Asian coolant. https://www.valvoline.com/our-products/antifreeze-products/zerex-asian-vehicle-antifreeze-coolant
     
    Last edited: Jul 1, 2020

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