Originally Posted by JGCDieselPowered
Thanks Roadkill. What was the newest TSB? I am taking my 2014 for an oil change this week and want to make sure I get it (if needed). Thanks!
is the informed owner's go-to source.
In this particular case, TSB 18-023-15a was released as an RRT (i.e. listed as RRT 14-107). TSBs are generally applied only if the owner complains about the specific issue cited, whereas RRTs are applied by default.
This is an RRT, applicable only to 2014 NA EcoDiesels, because some of the fixes included in it or one of the previous versions are intended to arrest the SCR damage that has been leading to P20EE codes. Normally you can tell what is new in a given release by reading the changelog lines that have asterisks prepended/appended.
These firmware updates are "roll ups", so they include everything listed. That is to say, you don't need to have all the previous TSB firmware updates applied sequentially because the latest version includes all the previous fixes as well.
It certainly looks like the issues covered in this latest RRT are good to have addressed. I had a P204F once before.