I recently put a high-flow cat on my car(meaning sunday) and on my way home tonight my ses light came on. I will go and get it scanned in the morning but I am assuming it is an o2 sensor code. Anyone else have this happen and if so which o2 sim would work? thanx

 

Why would u get an o2 code if you have a high flow catalayic converter?

 

Regardless of what you think it is, get the code pulled first and then go here:

http://forums.maxima.org/showthread.php?t=374481

And then the FAQs, How Tos, TSBs, etc....

If you still can't find an answer, then try starting a thread. Its pointless starting a thread if you don't even have the codes because its nothing but speculation. There are many discussion on O2 sims in the meantime, including two that are linked in the Stickies.