aggravating

Hey, I had a long discussion with y'all earlier about my engine running like s***, turned out to be a stuck open injector- and I'm infinitely thankful for the help. But there's something else strange about my car that has irritated me for a long time. About 99 out of every 100 times I drive it...

On my 1997 ford explorer My drivers side interior door unlock feature does not work. I can use the interior lock to lock all the doors, but I cannot unlock it. the passenger side both functions work. the Keypad works to lock/unlock the doors, same with the factory keyfob, and the aftermarket...