As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED ON DEPARTURE WE NOTICED THAT THE CABIN RATE WAS STUCK ON ZERO FPM REGARDLESS OF THE KNOB POSITION. THE CABIN ALTITUDE AND PSI WOULD CHANGE ACCORDINGLY BUT WE WERE NOT ABLE TO GAUGE THE FPM DUE TO THE SENSOR NOT WORKING. WE DIVERTED TO KBUR AT 12,000FT. MX TROUBLESHOT IT TO BAD CPAM AND TWO LOOSE CONNECTORS ON OUTFLOW VALVE. MX TIGHTENED THE CANNON PLUGS AND R&R'D THE CPAM. ALL OPS CHECKS GOOD.