As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMF FLIGHT 2415: THE NOSE STEERING CAUTION LIGHT CAME ON JUST AFTER LANDING. RAN THE CHECKLIST AND THE NOSE STEERING CAUTION LIGHT CAME BACK ON. MAINTENANCE REMOVED AND REPLACED NOSE WHEEL STEERING MANIFOLD IAW Q400 TASK 32-51-16-000-801 AND -400-801. OPS CHECK IAW TASK 32-51-00-710-801 GOOD. AIRCRAFT RETURNED TO SERVICE.