As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI IN ENGINE #2 FUEL FILTER BYPASS LIGHT ILLUMINATED- ENGINE RAN NORMALLY. GROUNDED - YES. REMOVED AND REPLACED ENG #2 FUEL FILTER DIFFERENTIAL PRESSURE SWITCH IAW B737-800 AMM 73-34-01. PERFORMED IDLE ENG RUN LEAK CHECK IAW AMM 71-00-00-700-801-F00. OPS AND LEAK CHECK GOOD (NO LEAKS NOTED). ALSO PERFORMED EEC TEST IAW AMM 73-21-00-700-804-F00 EEC TEST PASSED, NO FAULTS NOTED.