I have a 2016 Ram diesel with 40,000 miles. I got an exhaust system regeneration notice. the notice cleared and then my check engine light came on. I have 2 generic questions. The dealer charged me $220 for a stationary desoot. Was this necessary? I also had multiple issues (intake throttle valve, 2 gaskets and maybe a PCV valve). Is this going to be an ongoing issue with the newer diesel? This is my 6th cummings and I have never had these types of issues.