No, the engine light isn't on. Last time it was, was back in January - took it by Autozone and had them pull the code, and it was a misfire due to a crappy sparkplug.
Maybe an oxygen sensor, but if that was the issue your engine light would most likely be on. I've heard of people removing their oxygen sensors and spraying them down with brake cleaner. Let it dry then put it back in, worth a shot and shouldn't harm the sensor at all.