As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT FROM DTW, AIRFOIL ICE PROTECTION PRESSURE ABNORMAL LIGHT ILLUMINATED UPON SELECTION OF WING ANTI-ICE. FLIGHT WAS DIVERTED TO IND AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED WING ICE PROTECTION AIR PRESSURE SWITCH. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.