Cummins isx 15 CM2250 silent derate

[krowbar91]

Thanks for the comments. DOC and DPF have been completely gutted. SCR has not been touched. Truck has operated for 25,000 miles with no problems until exhaust leak was fixed on DPF and PM was performed. I have also ran truck at operating temp, idled for 1 minute then driven truck on the road. Code still stays inactive and truck derated even after reset from insite. My question is being that system has been gutted does the turbo not recognize any back pressure which trips this code???? Took truck back to shop that did the original programming for delete and was advised that software and calibrations were good.