Car not staying on?

One afternoon, driving to work my car shut off going up a hill so I pulled over and tried to turn it back on it cranked but never turned on. So I let it cool down for about 10 to 15 minutes cranked it up and it started but died again a few minutes later. I got it home but ever since it hasn’t ran properly kept dying even in idling. I heard these cars have problems with the crankshaft sensor, but I don’t know the problem.