As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING ASA T/C 05-020-01, FOUND ENG 2 EEC C1 FAULT WITH CORRELATED MAINTENANCE MESSAGE 73-43773. GROUNDED - YES. ON THE #2 ENG, FOUND FAULT CODE 73-43773, T25 SENSOR SIGNALS DO NOT AGREE ON EEC CH A. PERFORMED B737-9 IFIM TASK G73-21-00-810-915. REMOVED AND REPLACED #2 ENGINE T25 SENSOR REF B737-9 AMM 73-21-63/401. #2 EEC SYSTEM TEST PASSED WITH NO FAULTS FOUND. ETOPS GROUND VERIFICATION SUCCESSFUL.