I've done some searching on this forum, and the post that have the CEL codes don't have this codes on the 350z forum im seeing that My A/F Ratio Bank 2 is lean, so what is the problem, Bad o2 sensor? or a poss leak in the exausht? any imput to what the problem is and or how to fix it would be great thnx

 

does it go away by it self or has it always been on?

u need to give more info like what mod did u install for it to turn on?

I use to get that code when I travel long distances and different altitudes where the climate changes. If it goes away without u resetting then it's just your ecu being picky. If not, it could be due to your mods and u just need a tune to get your A/F ratio corrected.

 

Last mod i installed was my S techs bout a month ago, it came on a week ago i reset my ecu thinking it was just the fuel cap just not on tight came back on 3 days later, reset it again and it came back on i got the code last night and when i turned my car on this morning it was off