DodgeCowboy

So this maybe a redundant question, has any one else notice that have guage monitors notice a DTC code 1491 come on when it starts to regen? Every time mine kicks on a regeneration I notice this code. I haven't tried to leave it and see if it goes away after a few key cycles I just clear it and go on, it never sets off a cel so I am just wondering if it's the truck telling the truck what to do.