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I'm getting DTCs; P0171 and P0174 - Fuel Trim System Lean Bank 1/2. I've had my HP Tuner for a few weeks and just this past week-end connected to the GTM for the first time. Has anyone else encountered these DTCs? After cleaning the MAF and checking making sure there are no intake or vacuum leaks what values do you adjust using the HP Tuner to get rid of these DTCs?
My engine is an 2004 stock LS6, 15Kmile with 3" dual filter CAI.
My engine is an 2004 stock LS6, 15Kmile with 3" dual filter CAI.