Ok my cel came on with 0707 and 0304. So I look up 0707 and it says downstream o2 blah blah blah. So which o2 is that. The one near the downpipe (most likely downpipe=downstream)or at the cat? I have a 95 se. Doe this fix always fix the knock sensor code? And does anyone have the part number for it? Thanks

 

http://forums.maxima.org/showthread....readid=158988:)

 

its the one in/behind the cat

 

Mine is right in the cat. What does it mean when it is heated? Is that from a bad cat?