Codes are p1131 and p1151. Which is a lean mixture. IT said it also may be caused by a vacuum leak. I noticed when the light first came on that my vacuum hose from my cai was hanging off a little. I figured this was it so i tightned it back up but the light is still on. Do i have to get the light reset or will it go off on its own once the problem's fixed. I dont know if the vacuum line was the problem or not. It also said another probable cause is a bad fuel injector. damn that light pisses me off.