P2a00 2006Nissan Sentra -

Question

does a 2006 sentra 1.8 have a in line fuel filter?

Answer 1

check for intake and  exhaust leaks first if none are found most likely the oxygen sensor on bank 1 sensor 1 is bad. after a sensor is replaced perform the mixture ratio self-learning procedure (easy way to do it is disconnect the battery for 30min or so)

http://nissanhelp.com/diy/sentra/projects/nissan_sentra_clear_self_learning.php

 

if none of those help fuel pressure should be checked which should be 51 psi at idle 

 

the fuel filter is with the fuel pump assembly