2021 MX13 pac car dpf and scr efficiency issues in need of egr tuneup

[RollinCoal]

You can clean the doser but the issue is its not dosing enough def, when they get worn they tend to cut the cycle a bit short as they also "meter" the amount of def when this happens you tend to get SCR efficiency code monitor inlet and outlet nox you need a min of 70% conversion. Cummins with all working as it should will do 80-90% DD engines Ive seen 100% mostly 90+%