As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5493 DURING CLIMBOUT OF JAX RECEIVED A CABIN DOOR WARNING, CREW DECLARED AN EMERGENCY AND RETURNED TO THE FIELD. AIRCRAFT FERRIED TO CVG, CHECKED SENSOR PX27 FOR GAP, PRESSURIZED AIRCRAFT, DISCREPANCY COULD NOT BE DUPLICATED BY MAINTENANCE.