Possible bad ECM.
Possibly low fuel pressure
lack of fuel? fuses? fuel pump gone bad?
First thought: clogged fuel filter - or - defective fuel pump.
Fuel pressure regulator.
Fuel starvation I might guess, check your fuel filter and pump.
fuel pump?
We would need to know the vehicle to answer this. To my knowledge primarily Ford used roll-over switches to shut off the fuel pump, other manufacturers use different methods, not a shut-off valve.
In the absence of a fuel system shut off as in an alarm system I would suspect a fuel pump fuse, or faulty ignition switch
my 2004 VW passat shut down cause of fuel pump problem n then of fuel pump relay problem....
An internal combustion engine needs fuel, oxygen, and an ignition source. If any are missing, it would stop running.
A clogged fuel filter can restrict or prevent fuel flow. This would starve the engine of fuel, and cause it to shut down due to lack of fuel.
A bad fuel injector can cause an engine to continue running, for a few seconds, after the engine to shut off. The engine continues to run because of excessive fuel in a piston.