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Thread: Code po174/po171

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  1. #1
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    04's rarely have intake gasket vacuum leaks although it is common on the older versions.

    You need to check fuel pressure and check for vacuum leaks 1st.

  2. #2
    Join Date
    Jul 2008
    Location
    Grand Rapids
    Posts
    38
    I started it up this morning and the light is off. Its a little warmer today so I don't know if that was the issue or what. I'm not going to worry about it till it comes back on again. I hate idiot lights..
    04' silver,RCSB,volant intake,jba catback, 2" shackle kit,vette servos,

  3. #3
    Join Date
    Apr 2006
    Location
    Bellevue, Nebraska
    Posts
    1,304
    Mine's throwin the same codes. mainly when it's cold out.

  4. #4
    Join Date
    Feb 2007
    Location
    College Station, TX
    Posts
    2,193
    My truck throws the 171 code sometimes then shuts off, Im at the point now where I could care flippin less ...well kinda haha

    So either its bad 02 sensor or a vac leak? How hard is it to check for vac leaks?
    2012 F-250 XLT/FX4 RCLB 6.7 Powerstroke
    H&S XRT Pro Race(550hp/1100tq)/ 4" flopro exhaust/H&S EGT kit/SPE Full diff unlock/S&B CAI/H&S motorsports upcharge pipe kit/ DPF,CAT,EGR,UREA Deleted/Icon 3.5" Lift-Vs 2.0 shocks/PMF DSS w' Bilstein 5100s/Icon Adj Track Bar-upgraded steel bearing/RIGID LEDs/Kenwood DNX570HD w/idatalink maestro/Hertz5x7s/Memphis 12" slim/500.1 JL slash amp/Recon f250 led emblems

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