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From the codes that I see you might have an exhaust back pressure sensor that has gone bad, or the tube it mounts to is broken or plugged. The PCM uses the signal from the EBP sensor to aid in fuel mapping. Also, did you unplug your EBPV connector?
99.5 F-250 4x4, 7.3 PS
State 1 injectors from Rosewood, GT38 (van) turbo, S&B intake, Comp Cam's 910 valve springs, Smith Brothers pushrods, AIH delete TS 6-position chip. Pyro.
2005 front end conversion, 2008 tailgate, taillights, and rear bumper.
Edge CTS monitor, and 4" Exhaust (Manufacturer to be determined).