So had the wonderful geniuses at Autozone run my CEL just to see what it was. It says running lean on one bank. Think this is just a O2 sensor? Im trying to figure out what it is cause I really dont want to have to take my Injen CAI off and put it back to stock to take it in for warranty

 

what code?

 

all the guy told me was that it was running too lean on one bank

 

One normally looks the OBD2 Code number up in FSM and follows diagnostic proceedure spelled out in detail therein!

Failure to have a FSM and test equipment leaves you at mercy of whomever.

Are you not visiting dealership every 90 days [oil change recommend interval to maximize engine LIFE], SO the technicans can find warranty work to charge Nissan to repair?

 

I change my oil at my dads house on his lift using OEM nissan filters and Mobil1 fully synthetic oil

 

Failure to have documented LEGAL PROOF of an oil change at least every 180 days/7499.9 miles leaves you without an Engine Warranty per your Warranty Contract. Read your documents.
You may use any BUSINESS you desire, as long as the letterheaded receipt is dated, with VIN and mileage and shows oil quanity, viscosity, filter brand/size and is signed by someone of authority [who can be verified].

Do it yourself oil changes are not legally verifiable in court, even videotape cannot be proved as to date or editing. Friends who observe are just that friends and not considered reliable oil change experts.