Oil pressure gauge reads low but is oil is full then car shuts off it will restart but shuts off again after a few seconds?

Oil pressure gauge reads low but is oil is full then car shuts off it will restart but shuts off again after a few seconds?
Need more info. What kind of car? What model? What year? How many miles?Most cars will run with no oil in the motor, Only for A short time, This will ALWAYS ruin motor, Oil level being full does not make the car have oil pressure, although the car will not have oil pressure without oil in the motor. Going by the info. given, The motor needs rebuilt, This may not be the case though. could simply have a bad sending unit or guage.