As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRFOIL ICE PROTECTION PRESSURE ABNORMAL LIGHT ILLUMINATED DURING CRUISE. PERFORMED PRECAUTIONARY COCKPIT OPERATING PROCEDURES AND DIVERTED TO CLE. REPLACED AIRFOIL ANTI-ICE PRESSURE REGULATOR AND SHUTOFF VALVE. OPERATIONAL CHECK OK. AIRCRAFT RETURNED TO SERVICE.