If the light is gone you will be fine. The pcm runs self checks on the cars systems and when multiple missfires are detected at once will throw a code. Each time the car is started it will run the test again and after so many tests without multiple missfires detected the pcm will get rid of the code. Cars are not 100% efficient and missfire every once in a while. It just happened that multiple missfires happened at once. I would not bother checking anything unless the engine light comes back on. If it does, then proceed to do what was recommended earlier
