Sorry if this is a stupid question, but I thought I read something a while back of the knock sensor throwing a ghost code or something and effecting the rear O2 sensor. Or maybe its the other way around. Well anyway, I have both codes, the KS and Rear O2, so I was wondering, if one of them is bad will it throw the other code or are they both shot? Thanks

 

Replace O2 sensor 1st, (www.oxygensensors.com)..reset ECU..If KS code is still there, replace KS...Chances are KS is bad, if it's never been replaced..You can order KS from
www.jerryromenissan.com for $89.

 

Thanx man. I doubt the ks has been replaced. When I bought the car the kid said he took the car to a shop to replace one of the O2 sensors. When I changed the half shaft, It wasn't even hooked up. So I'm sure if they did change the KS they screwed it up.

 

My new KS cleared my 0303 code (front bank O2 sensor) as well as the 0304 KS.