As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT THE CREW REPORTED INTERMITTENT ILLUMINATION OF THE -PASSENGER DOOR- WARNING AND -PAX DOOR OUTER HNDL- CAUTION MESSAGES. THE CREW FOLLOWED THE QRH, RETURNED TO EWN, AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED & REPLACED THE PASSENGER DOOR HARNESS ASSEMBLY. ALL OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.