As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2308: DURING APPROACH, THE DEICE PRESSURE CAUTION LIGHT CAME ON. RUNNING THE CHECKLIST DID NOT SOLVE THE PROBLEM. DEICE PRESSURE GAUGE SHOWED BOOT SEGMENTS SECOND INBOARD FROM WINGTIP INFLATED. MAINTENANCE C/W FUNCTIONAL TEST OF AIRFRAME PNEUMATIC DEICING SYSTEM PER AMM TASK 30-11-00-720-801, TR 30-047. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.