It is possible that one of the door lock actuators is failing and it is not locking completely and the system is trying to continue to lock it. Check to see if the stuttering noise is coming from only one door. If so then it most likely is the actuator in that door.
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It is possible that one of the door lock actuators is failing and it is not locking completely and the system is trying to continue to lock it. Check to see if the stuttering noise is coming from only one door. If so then it most likely is the actuator in that door.