03 Tahoe fault code P0174

Discussion in 'General Chevy & GM Tech Questions' started by duffy, Jan 14, 2012.

  1. duffy

    duffy New Member

    What is the best way to fix a lean mixture in bank 2?
  2. dipstick

    dipstick Member 2 Years 100 Posts

    First thing clean the maf sensor.. if you have a oil type filter will mess maf up.
    Somewhere your getting more air than fuel. Check all down steam of maf is tight.
  3. sstoner911

    sstoner911 Epic Member 5+ Years 1000 Posts

    X2......the only other thing would be a vacuum leak downstream from the MAF. Be sure you get MAF cleaner....most auto part stores carry it.

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