My 1st work truck did similar things(less than 5k miles) , but they were consistently far worse. Was told it was body control module, dealer we get trucks from wanted to help but apparently it was a huge issue on some 17s. And had no timetable on when it could be done, bc the bcm was unavailable at the time. So we loaded that betch up on a flat bed work trailer and haven't seen it since. We were sol for about a day or two, till a new dmax came our way. However, my shiestya$$ gf snagged it, and we got his 250, (8k miles 12/17). Swapped drag tank and tool boxes and haven't looked back since. Been about a year and 45k + miles and no issues. Bout to throw her on a diet with ez lynk and some hollow piping. We leave it running a good 12hrs a day. It regens with a nice stinky cloud of white smoke. Great trucks they say..