I have a 08 g37s manual coupe. I have had this code(p0340) for a while. I put in work to change my engine and found a donor and just recently swapped the engine with less miles. Replaced the passenger side front camshaft sensor on the new engine. The same code(p0340) has came up. Car is in limp mode even with the new engine

 

I haven't had this issue with my G37, but had it on my friends camry, and it was due to the wiring that was messing it up. We replaced the camshaft sensor 3 times, but we just had to disconnect the wirings and use some electric cleaner spray on all the connections and it worked. Since you replaced the engine did you use the wires that came with it, or did you use your own from the old engine? If anything trace back make sure none of the wires and being stretched, and clean the connectors and try giving that a shot.

 

Is the harness damaged?

 

Thanks guys and the new engine came out of a 2012 g37x auto and I reused my wiring harness and ecm. I checked and there is no voltage coming from the three pin connector

 

The wires themself look in good condition does anyone know the pin assignment on the ecm side