My 2012 Lincoln MKZ Hybrid is shutting down completely on the highway only after over 60 miles of driving. A red yeild symbol flashes on the dash with the message, pull over safely. The car locks up and disables the ability to drive it. I then have to pull over on the busy highway, wait 10 minutes and turn back on the car. This will keep happening after continued long drives. I took it to a Ford dealer service department where they said it was a software issue, did some programing and sent me on my way. The car did the same thing on my next long trip. A few days after that I took it to a different dealer, where they said the water pump needed to be replaced. They replaced the water pump and assurred me it was fixed. One day later it did the same thing! I brought it back to the Ford dealer where we are now at a stand still with them not believing me that there is a problem and me telling them, please believe me, you need to drive it over 60 miles on the highway for it to happen!
PLEASE HELP! THANK YOU!!