I can only speak of mine 03' Ford F150 FX4 Lariat, I don't know about others, but I would like to know if they're are others. I get the P1000 code every time I switch it back to stock  , if they're are others in the older yrs bracket getting this code, please let me know. 
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GSXRider  03' Ford F150 FX4 SC, Fabtech 6" Lift, Perf. Accessories 3" Body Lift, ATX Artillery Wheels, Pro Comp MT's 37x12.5x17, K&N CAI, Gryphon w/mounting pod, Alpine CDA-9856 Receiver, 2 Alpine 10" subs, 4 Alpine 5x7 speakers, 4 Swivel Tweeters, Viper Alarm with remote start, security and keyless entry system w/glass break sensor and battery back-up
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