Question

Codes P0136, P0325, P0340 will these codes not let my 1995 Nissan Altima 2.4L start?

Answer 1

The P0340 is for the cam position sensor. This will prevent the car from starting because the ecm doesn't see signal to let it know the engine is cranking.

The P0325 is for the knock sensor and is not a factor.The P0136 is for the rear O2 sensor, this will not prevent the car from starting.