As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE WHEEL GEAR DISAGREE MESSAGE IN FLIGHT. THE CREW DECLARED AN EMERGENCY, RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, DEFERRED THE LANDING GEAR THEN REMOVED AND REPLACED THE LT NLG PROXIMITY SENSOR HARNESS AND PERFORMED CHECKS IAW THE AMM TO CLEAR THE DEFERRAL. THE ACFT WAS RELEASED FOR SERVICE.