As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENG "ENG VALVE CLOSED" LIGHT REMAINED ILLUMINATED AFTER, WHILE RETURNING TO THE GATE IT BECAME INTERMITTENT. GROUNDED - YES. ACCOMP B737-800 FIM 73-06 TASK 805. NO FAULTS FOUND, NORMAL OPERATION. PER TSR 704484 REMOVED AND REPLACED #2 ENG HMU HPSOV SWITCH. REF B737-800 AMM 73-21-09. GROUND VERIFICATION ACCOMPLISHED NO FAULTS FOUND. ENG VALVE LIGHT CYCLED AS REQUIRED.