It won’t unlock at times.

Passenger side door won’t unlock at times. When it doesn’t work, I tried to use the fob and door unlock button. What could it be?

 

Door lock actuator. Theres threads on here about it if you do some searching. Pretty sure you have to replace the whole door latch mechanism or get creative and cut apart the old one to replace the motor.

 

Could be as simple as a loose wire harness behind the door panel.

They are very easy to remove and replace without breaking anything.

If this doesn't work, go for the actuator replacement.