My CEL on my 99 SE has been on for months and I want to fix the problem.
I went to Autozone and had it checked.
I got the codes:
P0325- knock sensor
P0133- 02 sensor #1 (is this correct?)

The guy at the Autozone recommended to get the 02 sensor fixed first since the knock sensor can go off at times.
I notice the poor gas mileage that I’ve been getting, and i think it's due to the 02 sensor that needs to be replaced.

How much do I need to spend on installation?
Is it best that I go to a Nissan dealer?
What is the name of the website where I can purchase 02 sensor the cheapest?
Which 02 sensor should I get? (Cheapest? Expensive?)

If someone is 100% sure on what they are doing, I will pay them to have this fixed. Of course, I’ll be paying you lower than what the shops are charging.

i know how to fix both problems i less than an hour if you are ever in the maryland area drop me a PM

darn it.. MD is too far from me.

I am in the PA (Reading), NJ (Old Bridge), and NY (Brooklyn, Queens) area.

I should be in the PA area in the comming week or two. Visiting my fiances grand parents and need an escape...

Which area in PA will you be in? Will you have all the needed tools and the lift?

do you know which 02 sensor to buy at oxygensensor.com ? I have trouble choosing one. The code was mentioned before.

Where did you buy your knock sensor?

Which area in PA will you be in? Will you have all the needed tools and the lift?

do you know which 02 sensor to buy at oxygensensor.com ? I have trouble choosing one. The code was mentioned before.

Where did you buy your knock sensor?

and how much $$ are you looking to get?