Question

P1065 code on my 2005 Nissan Xterra 4.0L, what is the location of fuel/air sensor

Answer 1

The P1065 code is for something for the ECM:

P1065 NISSAN - ECM Power Supply Circuit
Read more: https://www.autocodes.com/p1065_nissan.html

Here is the location image for the sensors

Answer 2

Hi there,

The A/F sensors are the first sensors in the exhaust system. These are mounted in the exhaust manifolds.