As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE DECENT, THE CREW RECEIVED A RIGHT HAND OIL PRESSURE WARNING MESSAGE. THE CREW STOPPED THE DECENT AND RAN THE QRH. THE CREW DECIDED TO DIVERTED. THE CREW PULLED BACK THE ENGINE TO IDLE AND LANDED AS NORMAL. THE CREW WAS ABLE TO TAXI TO THE GATE.