B6.7 CM2350

[kunzme]

Replaced EGR cooler during this repair, cleaned egr valve, differential pressure ports and intake. There is a very small amount of oil in cac plumbing. No boost or exhaust leaks, we have checked for each multiple times. Truck rans clean with downpipe unhooked from dpf. I don't believe it is actually building soot. I think there is something with the programming. It doesn't make any sense why if it shows 100% ash load it will perform fine. As soon as you reset with insite and the ash load goes to 0% it thinks it is building soot and tries to regen every few miles.