my volvo will not stay on after it has been warmed up, whats wrong on 2001 Volvo S60

every time i warm up my volvo it begins to hesitate then it turns off, whats wrong?

Asked by for the 2001 Volvo S60
I think you may have a failing fuel pump. Get the fuel pressure checked while the car is running and when it fails using an external fuel pressure test gauge.
If you want to find a specialist, here's a directory link for you:
some told me it was a air senor, could that be because last year there was a recall on all volvo s60 fuel pumps. can it still go out?