P0366, p0303 and p0315 code came out after a failue crank of my car

P0366 and P0315 are for the crankshaft position sensor. P0303 is a misfire on cylinder number three. The first thing to do, since it won't start, is check to see if the timing chain has jumped. Run a compression test. If all cylinders test very low or zero the timing chain has jumped and serious engine damage could have occurred. If compression is good, 150 PSI or higher, then the problem is with the crankshaft position sensor or the wiring going to the sensor. The misfire on cylinder number three is a separate issue and needs to be diagnosed once you get the vehicle running again. When you do the compression test if cylinder number three only tests very low or zero it's a valve problem. If the cylinder tests below 100 PSI but improves when you put a little engine oil into the cylinder through the spark plug hole the rings are the problem. If compression is good it's either an ignition problem such as a fouled spark plug or bad ignition coil, or a fuel problem, such as a bad fuel injector. Hope that helps! Jim