Chain was stretched by a tooth initially but threw no codes. I changed the chain tensioner, guides, water pump, engine mounts and lower control arms all in the same go since I was taking the motor out. Got everything back together and wouldn't start. Got a p0340 so I checked it out and it said camshaft position sensor bank one. Got a new sensor, no difference. If I unplug the sensor I can start the car. If I plug it won't start at all. I pilled out the wiring harness and carefully unwrapped the tape looking for problems all the way back to the ecu. No visible damage so I taped it back nice and neat then reinstalled on my car. Started up again, still same issues.

 

Have you verified the timing is still correct between the two cams and the crank?