My 2001 Saab 9-3 will shut off on its own.

What is your question?

the car will shut off when it reaches drive temperature. It will start and idle smoothly until shut off and it will not start again until the engine has cooled off. It has a newer crank sensor in it, a new direct injection cassette, new battery, and I tested the voltage to make sure its not the alternator or voltage regulator. One thing I notice was that the radiator fan was not kicking on while it idles and not sure if that has anything to do with the problem. and last thing is that the computer is reading no codes so that's no help either. any ideas or direction would be extremely helpful. I am new to saabs.