Daughter has a 2013 Edge with a 3.5L with 115K miles.  Attends University.  Recently she tried to start it up but it would not start or crank.  Lights will light up but will not crank and gives a  "Starting System Fault" code on dash.  Figured it had a dead battery cell so replaced battery.  Worked for a while and did same thing.  Took to Ford Dealership and they replaced the Transceiver in the steering column as well as a new key fob.  Worked for a week or two and started happening again.  Took back to the dealership but they don't have a clue what it is.  Will not start one day, the next time it will start right up.  Seems like 1 out of 10 times she tries to start it we have this issue.  Afraid to have daughter in unreliable vehicle.  Anyone hear of this problem?