J1939 Problem

[Prostar14556]

Every now and then when I get the lovely triangle running down the road and I look at my codes and know it is wanting a parked regen, by the time I get parked it throws a code 5018 also, once this happens it will not do the parked regen. I don't know why but resetting the body controller will sometimes alleviate the 5018 and allow the parked regen to start.