As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AN UPGRADED STEERING MANIFOLD WAS INSTALLED IAW AIRCRAFT MODIFICATION. SOON AFTER, A "NOSE WHEEL STEERING FAIL" AMBER CAS MESSAGE APPEARED UPON LANDING. CREW USED DIFFERENTIAL BRAKING TO TAXI OFF OF THE RUNWAY. DISCOVERED THAT WHEN THE STEERING MANIFOLD GETS COLD SOAKED AT ALTITUDE, THE UNIT WILL FAIL. UPON WARMING UP, THE UNIT WILL WORK JUST FINE. STEERING MANIFOLD REPLACEMENT FIXED PROBLEM.