Ok so it was nice out today and I had nothing else to do so I decided to detail my car. I washed and waxed it and cleaned up the interior. The only thing I did different was I cleaned up the engine bay. I used a wet rag and some soap then carefully rinsed it off. Once I finished I started up my car and I got a CEL. I have a 2.2 with a fujita intake. I'm sure that some water just got where it shouldn't have cause once i unhooked the battery for 2min the light didn't come back on.

If you have any ideas about what might have caused this please let me know