such as ignition coil failure, spark plug issues, injector problems, or oxygen sensor malfunctions. Engine misfires are one of the reasons for the check engine light to turn on and off. Sometimes, this engine misfire
as for the exhaust, i do know it has a 3"(cat-back), but it still has the cats so why would it give me a check engine light? as for the idle, it's seems fine(may have a small putter here and there, just thought it was because of the bigger exhaust) and the car runs good...
In this guide we will show you how to gather codes, popular reasons that trigger a check engine light, if the car is safe to drive and how to clear codes.What Goes Wrong?Popular problems include: shorted oxygen sensor heater, broken vacuum line, loose gas cap, bad spark plug, shorted ...