As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT DURING CRUISE FLIGHT, IN ICING CONDITIONS, THEY RECEIVED A WING ANTI-ICE FAIL MESSAGE. THE CREW DIVERTED & LANDED WITHOUT FURTHER INCIDENT. REPLACED THE LT WING ANTI-ICE VLV. OPERATIONS CHECKED GOOD WITH NO FURTHER DEFECTS NOTED.