2003 taurus recently had rough idle and then cut out expecially after 3-4 short trips in a row and then would not start until it had set for 45 min to 1 hr. Now turns over but won't start. P0191 code.

(Fuel Rail Pressure Sensor Circuit Range/Performance is official verbage for code) that exactly what code tells you
but i can be more specific and tell you
when the injectors got older and older they dripping the fuel rather spraying it and her comes the problem and when heats up the nozzles expand due to heat and its already old and got wider hole thats how it makes you a trouble and you should also notice an increasing fuel consumption
or it could be very simple problem if u are luck it could be just the fuel filter (Fuel Rail Pressure Sensor Circuit Range/Performance is official verbage for code) that exactly what code tells you but i can be more specific and tell you when the injectors got older and older they dripping the fuel rather spraying it and her comes the problem and when heats up the nozzles expand due to heat and its already old and got wider hole thats how it makes you a trouble and you should also notice an increasing fuel consumption or it could be very simple problem if u are luck it could be just the fuel filter