I’m stuck with my car. I have had a p0340 code camshaft sensor bank 1 position A. I changed the sensor, checked the wiring harness, replaced the timing chains and camshaft sprocket, after a long run with my old engine. I replaced my engine and still the same code. I just changed my ecu and still the same problem. I don’t done what else to do

 

If you replaced the engine and the ECU then your issue has to be somewhere in the wiring. The odds that both engines and both ECU's exhibiting the same codes is incalculable.

Double check all of your wiring harnesses, grounds etc.