these codes constatly come up 0602/1693 I know its a fuel and companion codes. these codes before I put mach 4's in would rarely show. and the smarty would clear them. now with mach 4's any level above sw 3 on smarty they come up and the truck does seem to run different. so im clearing these codes 2-3 time daily. why are they popping so often and can i do something about it. my AIT/sensor has been changed 6k miles ago. any help thanks.
2002 HO 6-SPD LB 4X4 QC HTT 62/14 SB-FE TST PM3/SMARTY MACH 4'S, RINGED AND STUDS, AFE/2
" 4"EXHAUST D/PRICOL GAUGES, FASS 150, VULCAN 1/2 DRAW-STRAW, 3/8 FUEL LINE, DSS-TRAC-BAR STEER-BOX, AIR BAGS,17'' KMC BLACK HOSS, 315/70/17 MICKTHOM MTZ'S 6" RCD LONG ARM LIFT AND DE-BADGED FOR FUEL MILEAGE. :-laf... THANKS RIP www.SOURCEAUTOMOTIVE.BIZ
2002 HO 6-SPD LB 4X4 QC HTT 62/14 SB-FE TST PM3/SMARTY MACH 4'S, RINGED AND STUDS, AFE/2

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