P2286 Ford - what does this mean when the truck dies and won't restart right away?

Question

I just spent $2K getting the EGR cooler and Oil cooler replaced 2 weeks ago. If it is the high pressure oil pump wouldn\'t that have been checked out? After setting for awhile, the truck will restart after it cools down. It may run fine for several days before unexpectedly stalling out and leaving me sitting in the middle of a busy intersection.