As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A LEFT ENGINE ANTI ICE CAS MESSAGE. AIRCRAFT RETURNED TO CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THE AIRCRAFT USING THE AIRCRAFT MAINTENANCE MANUAL. MAINTENANCE REMOVED AND REPLACED THE LEFT ANTI ICE MODULATING VALVE AND CHECKED AIRCRAFT PER THE AIRCRAFT MAINTENANCE MANUAL. THE AIRCRAFT WAS RELEASED FOR SERVICE.