Random Misfire of 2, 4, 6

[ohhh my]

Had a random misfire the other day while sitting at a traffic light. Check engine flashed for a few seconds and a little jitter, gave it gas and everything was back to normal and check engine light even went away.

Plugged in my reader and said it was a random misfire of 2,4,6. I was planning on changing my plugs this weekend anyways because I think it's about time.

Anything else I should check? Any reason why all of the driver side misfired at once?

Thanks