I have a 04 Nissan maxima 3.5 lt. I got a cold p0340 camshaft sensor bank 1. I changed it & it's still giving me the p0340 & im still having the same issue. I use a after market part not the dealer

Please understand the fault code you have, it doesn't mean the sensor is defective, many other factors cause this code. Go to the link please. P0340 Nissan Camshaft Position Sensor Circuit Bank 1

code p 0340 refers to camshaft position(CMP) sensor A bank 1--circuit malfunction===causes wiring---CMP sensor ---ECM
because it denotes bank i ( bank closest to the fire wall) did you change the correct sensor
check for wiring and harness conditions ait it may run close to the manifold and be worn through or broken at places

Here's a link Larry to your P0340 code. P0340 Nissan Camshaft Position Sensor Circuit Bank 1

I am not sure what "slip n tcs" means but on the 2005 nissan maxima the code P0340 is for the camshaft position sensor circit on bank 1, which is in the rear of the engine compartment. Code P0345 is for camshaft position on bank 2, which is in the front of the engine compartment. The images show the Cyl banks and a cam sensor.

I had the same problem Nissan just replaced one.

P0340 - Camshaft Position Sensor Circuit Malfunction. Possible causes - Harness or connectors (The sensor circuit is open or shorted)
- Camshaft position sensor may be faulty
- Camshaft (Intake) may be damaged
- Starter motor may be faulty
- Starting system circuit
- Dead (Weak) battery Possible solution - Charge battery
- Repair harness or connector
- Replaced Camshaft Position Sensor.

P0340 is the camshaft position sensor A circuit {bank 1 or single sensor}

The crankshaft position sensor works in tandem with the camshaft ones, and they sometimes fail together. I've seen it written that the crankshaft one should be changed WITH the cam ones. They're kinda expensive, but the no spark/injection thing suggests that may be your issue. <!-- from fixya rte -->

P0340....Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)
P0325....Knock Sensor 1 Circuit (Bank 1 or Single Sensor)if you have no spark it your cam sensor

Replace the sensor.