Sensors and DPF units getting plugged up is result of collecting soot from fuel. Diesel only burns about 82% complete, the remainder is soot that is dumped in the oil and out the exhaust. Several companies make fuel catalysts which causes diesel to burn closer to 99% complete. I have tried a couple over the years, some work better than others. By having my diesel burn up to 99% efficient I do not get plugged filters or sensors. 1 way I can tell is my oil analysis shows my soot level between 0 and 1. There are a lot of other ways I can tell, but never needing a Regen or a DPF cleaned is the most important.