As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - ON FLIGHT 2503, RETURNED TO GATE. CROSSFLOW PUMP CAUTION MESSAGE ILLUMINATES WHEN MANUAL OVERRIDE IS SELECTED JUST PRIOR TO TAKEOFF. MAINTENANCE COULD NOT DUPLICATE PROBLEM. REMOVED AND REPLACED FUEL QUANTITY GAUGING COMPUTER FOR PRECAUTIONARY REASON. OPERATIONAL TEST GOOD. AIRCRAFT RETURNED TO SERVICE.