As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - ON TAXI OUT FOR FLIGHT 4327, RECEIVED A "XFLOW" CAUTION MESSAGE. RETURNED TO THE GATE. MAINTENANCE CLEARED THE FAULTS IAW CRJ-700 SERVICE LETTER SL-28-007 REVISION C. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE, NO PARTS REPLACED.