As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLIGHT 4299 - AFTER LANDING DURING APU START RECEIVED AN "APU LCV CLSD" CAUTION MESSAGE AND A OIL SMELL IN THE BLEED AIR. REMOVED AND REPLACED APU LOAD CONTROL VALVE IAW AMM TASK 49-51-05-000-801-A01 AND 49-51-05-400-801-A01. OPERATIONAL AND LEAK CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.