As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RH ENGINE INTAKE LIGHT ON IN FLIGHT. QRH RESET THEN LIGHT CAME ON AGAIN. AIR TURN BACK TO DTW. MAINTENANCE REPLACED RH DEICE CONTROL MODULEPN 44730-501, SN/ON A00021. PERFORMED 30 MINUTE GROUND RUN.. ALL COMPONENTS VERIFIED TO BE HEATING. ALL CHECKS GOOD AT THIS TIME.