P0171 - NCRS Discussion Boards

P0171

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  • Peter M.
    Infrequent User
    • December 27, 2023
    • 1

    P0171

    Looking for help. Ls 2 with this code. Short and long term fuel limits are very high. Any thoughts?
  • Mark E.
    Extremely Frequent Poster
    • April 1, 1993
    • 4498

    #2
    Re: P0171

    Welcome to the TDB Peter. I can't help directly nor does this forum get many "what does this code mean?" questions. Nonetheless, some suggestions:

    - To encourage a response, use a descriptive title and state the model year and any other pertinent information about the car

    - Check out the "C6 Scan and Tune" forum on Corvette Forum. It specializes in this type of question.

    - Get the factory shop manual. It's invaluable while diagnosing trouble codes.

    Good luck.
    Mark Edmondson
    Dallas, Texas
    Texas Chapter

    1970 Coupe, Donnybrooke Green, Light Saddle LS5 M20 A31 C60 G81 N37 N40 UA6 U79
    1993 Coupe, 40th Anniversary, 6-speed, PEG 1, FX3, CD, Bronze Top

    Comment

    • Robert P.
      Very Frequent User
      • October 19, 2019
      • 300

      #3
      Re: P0171

      PO171 is a lean code for bank one , first thing i would do is find someone with a smoke machine and have it tested
      Bob Peckham

      Comment

      • John D.
        Very Frequent User
        • June 30, 1991
        • 874

        #4
        Re: P0171

        Here is some info on that DTC from the serivce manual. Suspect an intake or exhaust leak.
        Attached Files

        Comment

        • Chris T.
          Infrequent User
          • August 31, 1986
          • 28

          #5
          Re: P0171

          A couple of video links to help explain the DTC code.

          TechShop's Tool Minute: Interpreting Fuel Trims (techshopmag.com)

          TechShop's Tool Minute: DTCs P0171 and P0174 (techshopmag.com)

          Comment

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