Ok so I installed an AEM CAI and XLR8 j-pipe, test pipe, and catback exhaust on my 2007 TL Type S a couple of weeks ago. I also just added fuel injector cleaner to this tank of gas which is about on empty. Yesterday my check engine light came on, so today I took my car and had it checked. The code that came up was P0171-Fuel Metering Too Rich. I was wondering if any of the above actions I did caused the CEL to come on or is it because of something else. I have been doing alot of research on the code but wanted to get some opinions from you guys.

 

Get the code cleared, disconnect the battery for about 15mins (make sure you have codes for navi/radio) and see if the errors comes back.