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p0171

  1. J

    H3 Hummer H3 2006 - error code P0171 (poor mix) and excessive consumption

    Hi, I have a Hummer H3 2006 vortex 3.5 lts engine with the following faults: - Check the check with error code P0171 (poor mix) and - Exaggerated fuel consumption Generally speaking the van works perfectly. It does not show obvious faults in the operation except for an exaggerated consumption...
  2. rascole

    P0171 code - cracked exhaust header. Replacement header options???

    Well pretty sure I found what was throwing my P0171 code today. I followed my troubleshooting steps and have found the problem.....I hope. My next step was to replace the K&N CAI with the factory setup. After everything was re-installed I let it run for awhile and the light came right back. At...
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