As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL FLIGHT CREW RECEIVED PACK 2 FAIL MESSAGE. CREW ABORTED TAKE OFF RETURNED TO GATE MAINTENANCE PLACED SYSTEM ON MEL AND AIRCRAFT WAS RETURNED TO SERVICE. MAINTENANCE CLEARED THE MEL BY REPLACING THE FLOW CONTROL VALVE.