As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRESSURIZATION AUTO FAIL ILLUMINATED AFTER LANDING. GROUNDED - YES. ACCOMPLISHED #1CPC BITE REF B737-900 FIM 21-31 TASK 801. FOUND NO ACTIVE FAULTS. IN HISTORY IT SHOWED OFV FAIL, ONE TIME. ABLE TO CLEAR FAULT LOGGED. PERFORMED PRESSURIZATION SYS MANUAL MODE TEST. TEST PASSED. NO FAULTS LOGGED. REF AMM 21-31-00-710-801. PERFORMED CPC GROUND TEST ALL TESTS PASSED. OFVLV LOOKS CLEAR OF ANY FOD.