Code Help Please P0302

[double06]

First off, I'm new to the forum and to the X5 so thanks in advance for your help. I've only had the thing for a couple of weeks and my first fix was the tailight prob. Today, I got a P0302 code and it was misfiring. I took it to Autozone and the code reader said

P0302- Cyclinder 2 misfire condition
Cause- Plugged or faulty fuel injector
Vacuum leak
Engine Mechanical Condition

I've done a search but couldn't find anything on this. The strange thing is, it was misfiring when I took it to autozone and when I left Autozone, it was running fine. The SES light was still on but all cylinders were firing. Any suggestions on where to start? Link me to the info and I'll get on it!

Thanks, Nat


Almost forgot. 05 4.4