why does my engine shut off.

driving at any speed, at any time of day, at any engine temp, cool or normal, up or down or on level ground, accellerating or decellerating or cruising at any speed, even on highway in cruise mode, just driving normally and minding my own business, the engine will shut off with no warning or indication of a problem... I can put car in neutral and coast, then turn off key and then restart the enging and put it back into drive and go again as if nothing happened. This may happen after 2 - 3 min of driving or up to 45 + min of driving. engine code read out says
"TAC module processor, pd, The book doesnt tell me anything I can do to fix this problem nor what it means...help me please