What was found
(CAN) ON APPROACH AFTER PUTTING THE LANDING GEAR DOWN, THERE WAS AN ECAM MSG REF. TO NOSE WHEEL STEERING FAULT. AC CARRIED OUT A MISSED APPROACH AND WENT THROUGH THE QRH. TOWER CALLED OUT THE EMERGENCY EQUIPMENT FOR THE LANDING. AC LANDED ON 24L, AFTER LANDING, THE AC WAS ABLE TO TAXI TO THE RAMP. (AC REMOVED FROM SERVICE FOR N/W STEERING INVEST.)