I noticed the front coil on the passenger side is arching to the valve cover area at the bottom of the coil.

Is the fix , to replace the coil? If so, should I just replace that one or should I replace them all at the same time?

Rick

 

Replace the coil. It takes about 20 minutes from start to finish since you have you pull the air intake on the top. The coil is about $100 plus any freight and taxes. I had the Cyl 1 coil arching myself. Replaced the coil. No more P06b6 codes either. Pro tip, before replacing the coil, blow out the any thing in there. I had an alumium like powder dust in the spark plug well. Good luck.