Okay I was driving to oklahoma City today, about 30 miles from my hometown and on my way back home my car started acting wierd. When I was driving it was fine, but everytime I came to a stop light and had it at idel it would shake pretty bad, and when I got going again it would be fine. About half way home I got a check engine light so I stopped off in another town that I was currently in and went by autozone to have it checked out. It turns out I threw two codes.

1.) PO202: The PCM has determined that a malfunction exists in the electrical circuit for cylinder #2 fuel injector.

Would this mean I need to replace my fuel injector, or does it need to be cleaned out? I though I read a thread on someone with a similar problem a few months ago, but I can't find the thread. As for the second code.

2.)P0302: The PCM has determined that a misfire occured in cylinder #2.

Would this be because of the faulty fuel injector or could it be an issue with my spark plugs of something of that sort. Anyways, not much a mechanical whizz kid so any help would be appreciated. Don't really want to shell out the remainder of my student loan to a mechanic if it's somthing I can get fixed myself.