My car has been driving sluggish lately (1995 max)
CEL came on...the code i got P0325 & P0155(B1S2 something like that).
now i told my mechanic that i would buy the 2 sensors
he told me well...alot of maximas get the knock sensor code (meaning he thinks there is nothing wrong with it)but im like why would the code some up then...anyway...
the O2 sensor in the front he told me dont buy yet...he cleared the codes and said if the CEL comes back on then come see him
i said ill post here to see what u guys think.

 

look in the stickies man, there is one that says what each code means...and then post

 

i know what the codes mean...i just stated that.....its just what the mechanic told me....that im confused about and just needed a little direction from u guys as to what u think i should do

 

if it doesnt come on again, i'd leave it alone.

 

I think you should wait until the CEL comes on again it definitly will if it's the knock sensor. The sensors aren't cheap so you wanna be sure before you start replacing them. The knock sensor is a bi*** to replace unless you have small hands.