As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE OIL FILTER MESSAGE DISPLAYED. MESSAGE REMAINED WHEN THRUST REDUCED. #1 ENGINE SHUTDOWN, EMERGENCY DECLARED, DIVERTED TO SLC. AFTER ENGINE SHUTDOWN, MESSAGE DISAPPEARED. REPLACED THE OIL PRESSURE SWITCH ON THE LEFT ENGINE. SYSTEM OPS CHECKED GOOD IAW BOEING MM.