One problem related to brake sensor has been reported for the 2011 Ford F-250. The most recently reported issues are listed below.
While driving at around 60 mph the dash starting chiming and gave me a stop safely now message. I slowed down and pulled over to the side of the road. At about 5 mph the truck shut off, power steering and brakes faded. I was barely out of the lane of traffic and my attempts to restart the truck and get it further off the road to a safer spot were not allowed by the computer system. I had the truck hauled to a nearby Ford dealer and after cooling off all night the truck would restart. The local dealer could not fix the problem due to trouble with his diagnostic computer so he suggested I travel to another dealer. He felt I could make it there with the truck. I went to the motel where my wife and I had to spend the night to pick her up, a distance of about 1-2 miles. We loaded our belongs up into the truck, I restarted it and started to back out of the parking space and it repeated the stop safely now warning and shut the truck off immediately seeing my speed was under 5 mph. I was halfway out of the space and was stuck there. I was very fortunate it helped in the motel parking lot as opposed to just as I pulled out into traffic. . At the next dealership the problem was diagnosed as a bad sensor in the exhaust system.