Code p0340, Camshaft bank 1?

I can tell you the sensor might not be the problem, it will have this code as well when the camshaft timing is off due to low or dirty engine oil, or the timing chain/guides are worn/broken, or the camshaft actuator has gone bad.

P0340 - Camshaft Position Sensor "A" Circuit Bank 1

Here is the location of the cam sensor (right side, rear of the cylinder head) so you can check it out. Make sure to clear the codes once the sensor is replaced. Also, does the engine make noise at idle? If so, this can be a sign the engine timing system is having an issue, if you upload short video of the engine idling, I can tell for sure. Check out the images (below). Please upload videos in your response.