As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED APU OIL PRESSURE CAS MESSAGE DURING CRUISE FLIGHT. CREW DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE VERIFIED APU OIL LEVEL AS FULL AND OIL PRESSURE SENSOR CONNECTOR. NO DEFECT FOUND. CHECKS PERFORMED BY MAINTENANCE IAW AMM. COULD NOT DUPLICATE MESSAGE. ACFT RELEASED FOR SERVICE.