As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT APPROXIMATELY 10,000 FEET, THE PASSENGER DOOR MESSAGE CAME ON. PERFORMED QRH PROCEDURES AND RETURNED TO SLC. PRESSURIZED AIRCRAFT TO 4.0 DELTA P. FOUND DOOR INDICATOR TO FUNCTION NORMALLY. CHECKED FAULTS IN PSEU. CLEARED FAULTS. CYCLED PASSENGER DOOR SEVERAL TIMES. NO FAULTS NOTED. OPS CHECK GOOD.