As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED EMERG PARK BRAKE NOT RELEASED MSG IN FLIGHT, DECLARED EMERGENCY AND LANDED WITHOUT INCIDENT INTO DEN. MAINTENANCE REMOVED AND REPLACED NR 1 EMERG BRAKE PRESSURE SENSOR PER EMB AMM, OPS CHECK GOOD. A/C WAS THEN RETURNED TO SERVICE.