As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4249 - CREW ABORTED TAKEOFF FOR ENGINE NR 2 OIL PRESSURE WENT TO RED ON TAKEOFF ROLL. FERRY TO CMH. MAINTENANCE C/W ENGINEERING ORDERS EM-7900-010 AND EM-6900-011. INSTALLATION ON OIL PRESSURE RELIEF KIT AND SMART SENSOR (NEW PN 23073475A). OPERATIONAL AND LEAK CHECKS SATISFACTORY. AIRCRAFT RETURNED TO SERVICE. (X)