I have a 97 Nissan Maxima that is throwing 3 codes. 1) After cat oxygen sensor, 2) knock sensor, and 3) speed sensor. If I have to replace all of these, it'll be very expensive and time consuming. I also heard that the speed sensor code is sometimes caused by a faulty guage cluster, and I definitely don't want to replace that. The car runs and drives perfectly, but I now have to pass emissions. Does anyone know if any of these codes can be simply tuned out like some LS1 codes? Someone please help me out. Thanks.

 

ha, funny, I have a 97 maxima thats throwing the O2 code and the knock sensor code. Here is the thing...I was told on the maxima forums that if you replace that O2 sensor...that may take care of the other engine codes. That damn o2 sensor is about 80 bucks though....and the knock sensor from autozone is 168.00! That speed sensor should be about a 50 dollar part but do yourself a favor and replace the o2 and see if that fixes your problems first and foremost.