Headed into town today, got about 200 yards from the house & my truck lit up with the message "Reduced Engine Power", shifted all the way down to 1 (out of 6) and freakin' died. It's a '15 F250 diesel with a little over 8900 miles (I don't get out much ). The only message I regularly get is "Cleaning Exhaust" and it was a little low on DEF when we checked but no other indications anything was wrong. Had it towed into town and naturally next Tues is the earliest they can work on it. Any thoughts?