I had an ses light come on the other day and it's been coming on and off intermittently over the past few days. When it came on today I went to advance auto parts and had it scanned and it said that there is a lean condition on bank 1.

 

do you have a header gasket leak? that can cause a false lean code. Also a vacuum leak. check the obvious before you replace parts. also get the code number for us, it my help

 

I found the problem, the rubber elbow on the pcv valve was torn and had a huge hole. I replaced it and the car seems to be running a lot better, especially at idle. no more code. Damn vacuum leaks