As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT LIGHT. GROUNDED - YES. APU FAULT LIGHT FOUND AS FAULT CODE 49-61223 INLET TEMPERATURE SENSOR SHOWN REF B737-800 FIM 49-60 TASK 801. DID VISUAL INSPECTION OF CANNON PLUGS AND CHECK FOR TIGHTNESS REF FIM 49-60 TASK 812. FAULT LIGHT EXTINGUISHED. OPS CK NORMAL.