Where are the camshaft positioning sensors bank 1 and bank 2 located?

The problem will probably not be the sensors, you get these codes when the timing chains, guides and camshaft actuators go out, this is a common problem. But if you want to give it a shot here, they are at the rear of the cylinder heads. The way to tell if the timing components are worn out is the eigne is make a slight rattle sounds at idle. Check out the images (below). Let us know how it goes.