So title says most of it. This is a tricky code. It's dealer specific. What makes it weird is this code comes and goes randomly on it's own. I don't change anything, it just pops up and disappears as I drive.

So far, this code is related to the A/F o2 sensors that were first used in on the Sentra in the 2006 SER Spec V's. It is used in a few other nissan cars also, and upon googling the code, it seems to be trouble some across all nissan models.

Because the code comes and goes, I don't believe it is a faulty sensor. the only other probable cause I can come up with is a leak in my header (aftermarket 4-2-1) near the sensor. I've looked and felt for any leak, but I haven't had any luck.

I've come to the point where I just got another header to try, new gaskets and such. I don't know that this will fix the problem though.

Any ideas?

Anyone?