As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - ON FLIGHT 2424 RETURNED TO GATE. ON PUSHBACK, NOSE DOORS OPENED AND CLOSED 2 OR 3 TIMES THEN OPENED WITH NO GREEN LIGHT, NO DOOR CAUTION AND NO RED NOSE LIGHT AND HANDLE LIGHTS ON. MAINTENANCE REMOVED AND REPLACED NLG K1 PROX SENSOR HARNESS. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.