The Kwikset Powerbolt 2 Electronic Deadbolt comes with the Auto-Lock feature. This feature (when enabled) automatically relocks the door 30 seconds after unlocking.
You can also set your preferred relocking duration—between 10-50 seconds.
In this video, I've demonstrated how to enable/disable the auto-lock feature on your Kwikset Powerbolt 2 Lock. You'll also learn how to set the locking delay time.
So, if you've been trying to activate the auto-lock and it's not working, you can follow my instructions here to get it to work.