As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIOR TO TAKEOFF CABIN DOOR, REAR, WARNING INDICATION LIGHT CAME ON. RETURNED TO GATE. CLEANED AND LUBED PROXIMITY SENSOR TO DOOR. OPS CHECK GOOD AT THIS TIME. REF AMM 52-42-00-710-801. FUSELAGE WARNING DID NOT RETURN. RETURNED TO SERVICE.