As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT EMERERGENCY CAUTION LIGHT ILLUMINATED RIGHT AFTER TAKEOFF. WE RAN THE QRH AND DECIDED TO RETURN TO SLC TO VERIFY THE DOOR. INSPECTED LEFT OVERWING ''E'' EXIT SENSOR AND SENSOR PLATES. NO DEFECTS NOTED - OPERATIONAL CHECKS OF PROXIMITY WARNING SYSTEM SATISFACTORY. NO DEFECTS NOTED AT THIS TIME.