had same problem hoogie...went thru hell and back with this problem. I posted a bunch of threads about 4 or 5 months ago when i was going thru the problem. basically, the K&N kit was returned; they reimbursed even though i didn't buy it directly from K&N. I had the dealership run the code and they too said the truck is runing too lean. the mass air flow sensor was triggering it. I found no fix for this after numerous calls to KN and few threads on here, and asking knowledge mechanics. The only thing that may work is if a computer chip is available to change the trucks air flow value to except the increased air flow. Good Luck
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