So I have a persistent CEL: 004804 DDE Reducing agent pressure buildup, plausibility.

Found this but no resolution.
http://www.bimmerfest.com/forums/sho...d.php?t=655644

I've already replaced a DEF tank and am tired of spending money to fix a system that is unnecessary, problematic, and costly to repair. I have read a bunch of threads about tuning and deleting the SCR and EGR systems and am looking for information on a fully sorted setup. I'm prepared to buy the downpipe and tune, and I'm looking for the complete package that will allow the OBDII diesel emissions check to pass.

Thanks in advance.