The drivers door power door lock fails to operate either to unlock the vehicle or to lock it. This is a safety risk as the power door lock should automatically lock the door once the vehicle reaches a certain speed to help doors remain shut in roll over accidents. Automatically locking the door also provides some security to occupants for carjacking. This problem first started when the door lock actuator failed to work in freezing weather at approximately 19,000 miles. The dealer was unwilling to repair it under warranty do to not being able to duplicate the condition despite video evidence. The problem has progressed to where it now no longer functions at all. This is not an uncommon issue as I have spoke with others who have had the same failure. Previous model year trucks have has customer gotten extended warranty from Ford to cover the lock malfunctions. Customer Satisfaction Program 20M04. Links to others reporting the same/similar issue: [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)