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  1. #1
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    Default Code 10PCM PO174 HC

    I have Code 10PCM PO174 HC showing up on my Corvette Computer..

    Means Fuel Trim System Lean Bank 2

    How do i fix it?

  2. #2
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    First, check for and repair any vacuum leaks. Next, run three bottles of Red Line Complete Fuel System Cleaner for the next three fill ups. Clear codes and road test. If the code resets, obtain the factory service manual for your model year. Zip Products is a good source for those. Look up that fault code in the FSM the follow the diagnostic and service instructions.

  3. #3
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    Where do you get Red Line Complete Fuel System Cleaner ?

  4. #4
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    Quote Originally Posted by cscarlson View Post
    Where do you get Red Line Complete Fuel System Cleaner ?
    Sometimes I see it at autoparts mass-marketers...Pep Boys, AutoZone, Kragen, etc.

    Any Red Line Oil Dealer will sell it.

    You may be able to buy direct on Red Line's web site.

  5. #5
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    sounds like a vacume leak

  6. #6
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    where would it be

  7. #7
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    I had the same code and a rubber hose comming off the pvc valve had a hole in it.REPLACED THE HOSE-no more codes!

  8. #8
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    Quote Originally Posted by ernestD View Post
    I had the same code and a rubber hose comming off the pvc valve had a hole in it.REPLACED THE HOSE-no more codes!
    Very common for the plastic fitting that the PCV hose plugs onto at the front of the engine to crack. GMJunkie pointed it out several times.
    The only thing that you accomplish when you make something idiotproof, is breed a better grade of idiot,
    Z06/Z16 #1689

  9. #9
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    where do you get the plastic fitting? part #

  10. #10
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    Quote Originally Posted by cscarlson View Post
    where do you get the plastic fitting? part #

    Don't have a number for you, but I'm sure the Chevy store will have exactly what you need.
    The only thing that you accomplish when you make something idiotproof, is breed a better grade of idiot,
    Z06/Z16 #1689

  11. #11
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    changed the pcv.. we'll see if it fixes the problem

  12. #12
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    Problem still there

  13. #13
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    Quote Originally Posted by ernestD View Post
    I had the same code and a rubber hose comming off the pvc valve had a hole in it.REPLACED THE HOSE-no more codes!

    Is it the hose the pcv valve goes in or the hose that attaches to it after it is in the hose housing?

  14. #14
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    Quote Originally Posted by BigJimZ16 View Post
    Don't have a number for you, but I'm sure the Chevy store will have exactly what you need.

    Called the chevy dealer. he says i have to buy the whole assy for that little hose. can you get me the part number

  15. #15
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    I simply cut a piece of fuel line hose/much thicker/and used that.

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