Engine cutting out

Car keeps cutting out and "shuts off". Wait a minute and try to turn it over and after a few attempts it will run. I drive a very short distance and it happens again. This repeats a couple of times and then it will drive normally to get me to work. The same happens eight hours later when I leave work. I have hooked it up to a diagnostic and got varying results from cam shaft sensor to injection control module malfunction. I have fitted a new cam shaft sensor and fuel filter. I have checked the filter in the tank which is clean but it still does it. I have been told it could also be the gearbox speed sensor. Any advice would be greatly appreciated. Many thanks.