As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLIGHT 5945, DURING POST FLIGHT INSPECTION THE CREW REPORTED A LANDING GEAR AIR/GRND FAIL MESSAGE. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND A LOOSE CONNECTOR ON THE LEFT LANDING GEAR PROXIMITY SWITCH. MAINTENANCE SECURED THE CONNECTOR, OPERATIONALLY CHECKED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.