As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: L1 DOOR WARNING CHECK DOOR PRESSURE. MAINTENANCE FOUND FAULT MESSAGE "DOOR BTL FWD1L/DEU-B(300RH1" AND REPLACED B DECODER ENCODER UNIT (DEU) PER AMM 23-73-47. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS NOTED.