As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PROP DE-ICE CAUTION ILLUMINATED DURING CRUISE WITH PROP HEAT SELECTED OFF. DIVERTED AND LANDED WITHOUT INCIDENT. INTEROGATED CDS FOUND FAULT CODE 929 CHANNEL B ON BOTH ENGINES. R & R SAT PROBE IAW AMM 34-11-11. PERFORMED FUNCATIONAL TEST OF THE PROP DE-ICING SYS IAW 30-61-00-720-801. OP CHECKS GOOD OK FOR SERVICE.