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P0300 P0171 P0174 code errors resolved

This is a discussion on P0300 P0171 P0174 code errors resolved within the General Help forums, part of the LSx Technical Help Section category; Yesterday I found the culprit behind my P0171, P0174, and the latest one P0300. on my 2002 TA there was ...

  1. #1
    Gold Member - fadjur
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    2002 Trans Am Convertible

    P0300 P0171 P0174 code errors resolved

    Yesterday I found the culprit behind my P0171, P0174, and the latest one P0300. on my 2002 TA there was a hole/cut in the the small PCV tube going from the passenger front base of the intake manifold to the PCV valve.

    Symptom: rough idle, SES codes above at random times, once in a while stalling at idle-1/8 throttle, slight hesitation off the line. no problems at WOT.

    Solution so far: 2.5" of 3/8 braded fuel line and hose clamps to replace the 591 rubber grommet. dealer wants $111 for the hose because it's part of the whole assembly. The part is #591 on the PDF file -- it's part of assembly 565 ($111). The 550 hose was also suspect so I put hose clamps on both ends of that bad boy.

    Go to the LS1 folder and look at the PCV pics and dealer part page...
    http://public.me.com/solutionhost

    not sure how to upload pics here... so the link is all I got... Check yours out -- mine lasted to about 92K.

    Peace,
    Tony

  2. #2
    Gold Member - fadjur
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    2002 Trans Am Convertible

    BTW: GMPARTS DIRECT has the assembly for about half the dealer cost:

    GM PART # 12590632
    CATEGORY: All
    PACK QTY: 1
    CORE CHARGE: $0.00
    GM LIST: $111.31
    OUR PRICE: $65.98

  3. #3
    Veteran Hi-Po's Avatar
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    1999 TA WS.6

    Thats awesome! Thanks for getting on here and tell your problem/solution. These are fairly common codes, and it will help somebody sometime if they search it out. Glad you got it fixed.

  4. #4
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    Quote Originally Posted by cold_surfer View Post
    Yesterday I found the culprit behind my P0171, P0174, and the latest one P0300. on my 2002 TA there was a hole/cut in the the small PCV tube going from the passenger front base of the intake manifold to the PCV valve.

    Symptom: rough idle, SES codes above at random times, once in a while stalling at idle-1/8 throttle, slight hesitation off the line. no problems at WOT.

    Solution so far: 2.5" of 3/8 braded fuel line and hose clamps to replace the 591 rubber grommet. dealer wants $111 for the hose because it's part of the whole assembly. The part is #591 on the PDF file -- it's part of assembly 565 ($111). The 550 hose was also suspect so I put hose clamps on both ends of that bad boy.

    Go to the LS1 folder and look at the PCV pics and dealer part page...
    http://public.me.com/solutionhost

    not sure how to upload pics here... so the link is all I got... Check yours out -- mine lasted to about 92K.

    Peace,
    Tony
    that's pretty common really. That's the first place I tell people to look if the symptoms sound like a vacuum leak. Glad you got yours figured out and thanks for posting.....will help someone else down the road.

  5. #5
    Junior Member
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    2000 camaro z28

    throwin the 171 and 174!!! im tryin to fix my car today since i do not have work. im also throwin 704 which is the clutch switch and a 401 whicgh is egr insufficient flow. if any1 can get back to me that would b awsome. im going to replace the egr valve today and im trying to figure out how to bipass the clutch switch. im still tryin to figure out wat hose i got that has a leak. ruff idle some times. idles low if sittin at idle for over 2 mins..

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