I have a 2002 dodge grand caravan sport that has automatic passanger sliding door. Sometimes the door opens when you push the key fob or the console button to open it, sometimes it just makes a loud clicking noise. Sometimes it opens up without a problem. When it's open you cannot close the door automatically without pulling the door handle directly out to disengage the door lock. I want to know if this a problem that I can fix myself, and how much if anything would it cost to do so?