As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE THE PASSENGER DOOR WARNING MESSAGE ILLUMINATED. THE CREW FOLLOWED THE QRH AND MADE AN UNEVENTFUL LANDING AT DESTINATION. MAINTENANCE INSPECTED THE PASSENGER DOOR LATCHING AND WARNING SYSTEMS. NO DISCREPANCIES WERE FOUND AND THE PROBLEM COULD NOT BE DUPLICATED. THE SYSTEMS OPERATIONALLY CHECKED GOOD AND THE AIRCRAFT WAS RELEASED FOR SERVICE.