hey guys, to start out i've got a 2000 camaro z28 with headers and an offroad y-pipe. today the service engine light came on and when i checked it the code was P0161. my question is that i don't know which sensor that is and what effect it's going to have any ill effects on the engine or the way it runs, performs etc. i've had the exhaust on the car for a while so im kinda stumped as to why it is all of a sudden coming on if in fact having no cats is the reason the light came on. thanks for any advice or explanations you guys have.
-Chris