Had my 2002 Toyota Tundra warming up to leave, it then stopped running on it own

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It now won't start. It does roll over, but won't start. Maybe it's the fuel pump or relay or something else like I think it may have shut down from the low oil sensor, was headed to take it for oil change when this happened. I added oil. Still doesn't start. Does something need reset in order for the truck to start?