As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN INFLT T887/09 SEPT SEVERAL MINUTES AFTER ENGINE WAS ON WING ICE, SMOKE WAS PRESENT IN COCKPIT AND CABIN. DIVERTED TO DEN AND LANDED WITHOUT INCIDENT. TURNED ANTI ICE ON AGAIN AND SMOKE REAPPEARED. PRESSURE ABNORMAL LIGHT ILLUMINATED. REPLACED ANTI ICE PRESSURE REGULATING AND SHUT OFF VALVE. SYSTEM GROUND CHECKED NORMAL OPERATION.