My check engine light is on. Which O2 senor is this (Code Po141). Is it before the cat? Could it be caused by my Xs headers?

 

Good luck man... I've put up two posts this week and the only person to step forward with help was fuzzy (but I didn't have all the info posted and haven't heard since).

I got the same code after my XS install and replaced the first 02 sensor before the cat... I still have the code and don't know what my next step should be. But theoretically, you should be able to just replace the first 02 sensor and be on your way.

Let me know how it goes!

 

The list says secondary, I'd assume that is rear. (at the cat)

I posted a CEL thread July 6th or so, as yet no answers. I just replaced both my 02's as I don't know when or if they have ever been replaced.

 

My OBD2 scanner said first bank of 2... my bad for not reading the title correctly! Did changing them eliminate your CEL?