Anyone know how to fix this? What is coil "A"? if that cylinder #1. I have a 2000 D w/ the 4.7. Just did a tune up and the CEL is NOT on, but I was showing a buddy how the D has an onboard diagnostic tool and this poped up. Any help would be great.

 

Duff:

If it is running ok, I would do a battery disconnect reset and clear the code. Then wail and see if it returns.

Don

 

it is cylinder 1 your coil might not be all the way on the plug try pushing down on it and see if it goes down any

 

I figured jigling the coil a bit might fix it. I'm gonna reset the computer as well. It runs ok, but feels a little bit like a misfire at idle. Might just be a bad plug. I'm gonna pull it tomorrow and double check the gap setting.