I had been unable to DC charge for the past few days. The sync screen just says Fault and all LEDs flash at the port. Level 2 and 1 charging is ok.
I took apart my charge port and discovered the Combo connector locking pin position switch in the servo motor was not always conducting.
If that position sensor does not conduct, your DC charge will not start.
If that position sensor loses conductivity during a charge, your DC charge will stop.
Both conditions show only as Fault on the Sync display.
The charging is fail safe so if any part of that chain is broken the charge will stop.
I sprayed contact cleaner on the switch, reassembled and tested by manually operating the lever on the side of the servo motor to push the pin out, then open the driver door, the pin will retract. If it does not retract then you have other problems.
I went right to a DC charge after the fix....all good, no problems!
If you take it to the dealer for service, have them check the charge connector locking servo.
My 2017 FFE is 4,335 miles old. I charge almost exclusively DC quick.