A Problem with REGEN design, it happened to majorities of the trucks with regeneration, it is not made to run in CITY Traffics or stop and go...
Don't wonder that miles you got, you run it an interstate highway or Toll road, but it will come back again, In my opinion, it is not design to...
Cascadia 2012 and older, Regen design IMO is faulty, everytime you have a check engine, Malffunction Indicator Lamp, and later a Stop Engine...