As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT HIGH PRESSURE CAUTION MESSAGE AT 8000 FEET. THE CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, R & R THE LT 10TH STAGE PRESSURE SHUTOFF VALVE INLET FILTER AND PERFORMED CHECKS IAW THE AMM. THE ACFT WAS RELEASED FOR SERVICE.