As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2565 - RECEIVED A XFLOW PUMP CAUTION MESSAGE AFTER XFLOW OVERRIDE SELECTED (NO CROSS FLOW ACTIVE). RESET SYSTEM WITH NO HELP. RETURNED TO THE GATE. MAINTENANCE REPLACED THE FUEL QUANTITY GAUGING COMPUTER. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.