As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO FAIL LIGHT ILLUMINATED IAW QRH, MODE SELECTOR IN ALTERNATE, AUTO FAIL LIGHT EXTINGUISHED. ACFT GROUNDED. ACCOMPLISHED BITE CHECK OF BOTH CABIN PRESSURE CONTROLLERS. FOUND CODE NR 057 ON CONTROLLER 1 AND CODE NR 22 ON CONTROLLER 2. BOTH FAULTS WERE ABLE TO RESET. GROUND VERIFICATION SUCCESSFUL. REF FIM 21-21 TASK 801 AND 827.