Check engine light code P0313
 

My S90 has a cel for a missfire at #3. I believe the code is P0313, any ideas?

While replacing the timing belt I decided to poke around the spark plug area to see if I could figure something out. I decided to unplug the coil at #3 and it looked like one of the wires going into the coil was not connected in the plug. So I tried to push the wire into the plug in and it seemed like it hardly reached. I then unbolted the coil and made sure it was plugged in all the way.

On the next drive the car is now running smooth and the code is gone. I'll keep my eyes on it.