Where is the crankshaft position sensor located?

I have an oil leak and a mechanic at AutoZone said that there was a problem with my crankshaft position sensor, so I got a new one now just need to know where the old one is to replace it. From searching online, I believe the crankshaft sensor could be the main cause of the oil leak so it would be great to replace it. As for the oil leak going around 30-40 MPH for maybe 5 minutes and the engine starts to smoke, I believe from the oil leakage when I look under the hood the oil spread around the oil cap and the wires by the battery as well as a little on the battery itself, another issue is when I go to accelerate the engine is hesitant a lot and takes a bit to speed up. I don’t know if that has anything to do with the sensor, but I hope it does so it will only be one problem to solve.