As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT RETURNED TO GATE AFTER THE CREW RECEIVED A PITCH TRIM CAUTION UPON PUSHBACK. MAINTENANCE INSPECTED THE SYSTEM AND CLEARED THE FAULTS BY CYCLING THE FCS ECU 1 AND 2 CIRCUIT BREAKERS. OPERATIONAL CHECKS WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.