As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - RIGHT WING ANTI-ICE CAUTION CAME ON AFTER THE SYSTEM HAD BEEN ON 5 MINUTES. WENT OFF AFTER THE WING A/I CROSSBLEED WAS SELECTED "LEFT" AS PER THE CHECKLIST. MAINTENANCE FOUND A VALVE DISAGREE MESSAGE IN THE MDC. PERFORMED A OPERATIONAL TEST OF THE SYSTEM WITH NO DEFECTS. NO FAULTS REOCCURRED. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.