Well Here goes, My 2000 SD 5.4 93,000 miles blew both head gaskets. All work performed(new complete head Gaskets, manifold gaskets, intake, oil gaskets, nuts, bolts, etc. ) Truck runs well now with no complaints................Except. Two engine codes now appear that wern't there before tearing top of motor down. 1.) P0102 MAF (mass air flow) A circuit low input. 2.)P0113 IAT (Intake Air Temp) Sensor High Input. I have erased codes after putting 200 miles on truck to reset computer(yea like that really works). Any Input out there?