As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSING THRU FL 200, CREW RECEIVED A FWD PASSENGER DOOR OPEN MESSAGE. RAN QRH AND PRESSURIZATION REMAINED NORMAL. AN EMERGENCY WAS NOT DECLARED AND LANDED WITHOUT INCIDENT. MAINTENANCE ADJUSTED L1 DOOR LATCH PROX SENSOR IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.