Code 0306 with no driveability issues

[Chilly]

My 2006 TB 6-cylinder has been throwing this code for awhile now, but it seems to run perfectly fine.

Should I start by replacing the ignition coil? Or should I just inspect the plug first to look for something abnormal, and/or swap the coil with #5 or 4?

 

[Tdub]

I would start with inspecting and swapping before replacing anything.

 

[Mooseman]

Swap the coil with another, clear the codes and see if the problem moves with the coil or stays.

 

[Chilly]

Swap the coil with another, clear the codes and see if the problem moves with the coil or stays.

Thanks for the advice, guys. I'll do that and let you know how it turns out.