As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUX HYDRAULIC ILLUMINATED DURING CRUISE FLIGHT. PILOT PERFORMED A PRECAUTIONARY LANDING. MAINTENANCE WAS DISPATCHED TO THE SITE. MAINTENANCE FOUND PRESSURE SWITCH INOPERATIVE. THE SWITCH WAS REMOVED AND REPLACED AND THE SYSTEM WAS OPERATIONAL TESTED AND AIRCRAFT WAS RETURNED TO SERVICE.