While driving dash will display an overheat alarm and I lose all power, turn car off and back on and temperature gauge returns to normal and I can drive again
How long has your 2015 Ford Focus had this problem?
Diagnostic testing must be performed to determine if there is a real engine problem, or if the engine coolant temperature sensor is reading erroneously for some reason.
RepairPal Certified shops can diagnose and repair your 2015 Ford Focus. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.