If your oil pressure is low, some cars have a feature which interrupts the fuel pump or ignition circuit to prevent engine damage. You should check the oil level and top it off if it is low and that might allow you to start the car. If the oil level is good, you may have a couple other problems...you could have a bad oil pump or the sensor which detects the oil level is bad and giving a false reading. Was the car making any ticking or knocking noises before it died? If not, replace the oil level sensor and that might fix the problem. If it was making noises, you'll need a repair shop to check it out for a bad oil pump.
