As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE OIL QUANTITY IN FLIGHT DECK READS LOW WITH OIL TANK FULL. GROUNDED - YES. ACCOMPLISHED STEP E 3,4,5 ALL VOLTAGE WITHIN LIMITS, ALL CONNECTORS CHECK GOOD. REMOVED AND REPLACED #1 ENG OIL QUANTITY TRANSMITTER REF B737-800 AMM 79-31-01-400-801-F00 OPS & LK CK'D GOOD.