There was an update to the ADIC (instrument cluster) that was supposed to help with the issue of tractor randomly reverting from operating RPM down to idle, not sure if that code relates to it or if you're describing that particular issue. Need to have your dealer run your SN to see if the update has been done. Seems like it was corrected from the factory on 2016 or 2017 models forward, can't remember for sure. Best to check it out. It is simple to fix, dealer just plugs in computer and does the update. Only takes 20 minutes or so. I did a couple of these on the New Holland Workmaster versions.