As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERT & DECLARED EMER. AT FL 370 CABIN STOP PRESSURIZING, THE CABIN ALTITUDE LIGHT & HORN CAME ON. THERE WAS NO RAPID DEPRESSURIZATION, CABIN BECAME WARM & STARTED TO SMELL AN ODOR. ENG PARAMETERS & FLIGHT CONTROLS WERE NORMAL. R & R PRE-COOLER CONTROL VLV IAW AMM.