Ford service can't even explain this problem and how it could have happened. Also the transmission now is torn up and needs replaced possible due to snow plowing for 2nd season even though we have the plow prep package.I've had my truck for 20 months and this is one of many problems I've had head gaskets blown, worn out wire harness, Block heater was replaced,high pressure oil pump replaced,block heater cord replaced,3 thermostats and 2 interior panels replaced.