As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 3841 FROM YYZ TO JFK RECEIVED NOSE WHEEL STEERING CAUTION MESSAGE. IT WOULD NOT RESET PER QRH. EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. AIRCRAFT WAS TOWED OFF THE RUNWAY AND THE SYSTEM WAS RESET. REMOVED AND REPLACED ELECTRO HYDRAULIC SERVO VALVE IAW AMM 32-51-15. OPS CHECK PERFORMANCE IAW AMM 32-51-10. OPS CHECKS GOOD FOR SERVICE.