As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STATUS MESSAGE "COND TEMP SENSOR L" APPEARED WHILE DELIVERING PLANE TO GATE. DEFER PER MEL 2152AA, LOW LIMIT VALVE IN OPEN POSITION. -INF- :BOEING AHM INDICATES MMSG 21-23401 REF FIM 21-52 TASK 809. IF NEEDED, LOW LIMIT VALVE (V21533) PCN 646-0017. PARTS: 646-0017 MR21562 VALVE ASSY. REPLACED VALVE PER MM, ACPD TEST NORMAL.