As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STEERING INOP CAUTION MESSAGE AFTER TAKEOFF. COMPLIED WITH QRH, REQUIRED TOW TO GATE. (FLIGHT 3699 - FILED CLOSED)FOUND RH NLG PROXIMITY SENSOR HARNESS WIRING TO BE INOP. SEE EAML 1779428 FOR REPLACEMENT OF HARNESS. OPS CHECKED NOSE WHEEL STEERING, CHECKED OK.