As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTURE FROM FCA RECEIVED CABIN ALTITUDE WARNING. UPON ARRIVAL INSPECTED ALL DOORS, N/D/N. INTERROGATED CDS AND FOUND FAULT CODE 'CPC/OF VALVE DATA FAIL' C/W FIM TASK 21-30-00-810-804. DOOR SEAL INTEGRITY CHECKS GOOD. A/C PRESSURIZES NORMALLY. FAULT CODE DID NOT RE-OCCUR. NO PARTS REPLACED. RETURNED TO SERVICE.