As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5549 STL - NOSE WHEEL STEERING FAILED DURING INITIAL TO TAKEOFF ROLL. PERFORMED LOW SPEED ABORTED TAKEOFF. DURING TAXI BACK TO GATE IT'S IF TILLER IS RELEASED THE STEERING FAILS. MAINTENANCE REMOVED AND REPLACED CONNECTOR ON 7 DEGREE PROX SWITCH IAW EMB 145 AMM PROCEDURE, OPS CHECK GOOD.