New Turbo & Actuator, 3 miles down , new camshaft??

[Waterloo]

I don't know if this will pertain, but a couple of years ago I had the sensor fail on the Crankcase Pressure filter box. Thank GOD I had Insite and my laptop in my truck. That little sensor, when it failed, sounds exactly like what your husband experienced, red triangle, derate and shut down. The sensor is located on the Crankcase Filter box, right at the top, on the side facing the radiator, driver side of the motor. It is held in with a torx screw. I'm just guessing, but that is something to look at. If a dealer had gotten ahold of me with that issue, oh my it would have been expensive, and probably never fixed. They would had said in frame too, as they would have had an ill-informed sucker to financially rape at will.