As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL, NR 2 ENGINE HYDRAULIC PUMP CAUTION LIGHT ILLUMINATED. ALL HYDRAULIC INDICATIONS APPEARED NORMAL. ABORTED TAKEOFF AND RETURNED TO THE GATE. SYSTEM PLACED ON MEL. AIRCRAFT RETURNED TO SERVICE. MEL CLEARED BY REPLACING THE HYDRAULIC PRESSURE SWITCH, OPERATIONAL CHECKS GOOD.