As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT DURING FLIGHT RECEIVING A CAS MESSAGES "FAULT CODE" AND "DEGRADED GAUGING" WERE DISPLAYED. THE MAINTENANCE TEAM TROUBLESHOT AND VERIFIED THE DISCREPANCY. THE LEFT OUTBOARD WING TANK GAUGE (L40QJ) WAS REMOVED AND REPLACED WITH A NEW GAUGE. FUNCTIONAL AND LEAK CHECKS WERE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.