As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT EXPERIENCED A FLIGHT TURNBACK DUE TO ILLUMINATION OF THE OIL PRESSURE LOW LIGHT DURING TAKE-OFF. FLIGHT CREW REPORT: OIL PRESSURE LOW LIGHT DURING TAKE-OFF WHEN AIRBORNE MAINTENANCE CORRECTIVE ACTION: SWAPPED OIL PRESSURE SENSORS & CLEANED THE ELECTRICAL CONNECTORS, AIRCRAFT WAS TESTED AND RETURNED TO SERVICE.