Crankshaft sensor problem

Im getting a P0335 code saying that my crankshaft position sensor circuit A is bad. I tried replacing the sensor that sits right in front next to the oil filter but it didnt work. The car doesnt want to start and is not getting getting the right fuel to air mix or the timing is off. When you hit the gas, it is very slow to respond and it is very choppy and wants to studder. Help please

You replaced the camshaft position sensor.

The crankshaft position sensor is under the starter.