Umm I did recently install an X pipe but the check engine
first came on first before the install.
Could be an exhaust leak I've read.
I was able to change the passenger side 02 but still hung up on the driver side. I bought two different style 02 sensor sockets and everything. What a bad location.. Anyway I'm afraid of running a brand new 02 and one with 85k on the other side ya know?
Ordered a can of throttle body and maf cleaner. Also a new air filter. I'll be doing that.