Took my car to the car wash yesterday and degreased engine while there. Afterwards, car started okay, but idled rough and light came on. I figured one of the ignition wires got wet and would be okay once dried out. Drove car today, drove fine (not rough anymore) but light still on. When I got home from work, I unhooked battery cable for 15 minutes to reset computer. Hooked back up, light still on. Went to Autozone and they gave code P0304. However, they do not show Suzuki in their database so they give me a Kia code. This code (for Kia) shows misfire in cylinder 4. Is this the same for Suzuki? Now that engine is dry, it does not feel like it is misfiring or missing. Acceleration is strong and smooth. Any suggestions?