Primary ignition coil B.
what is this?..which cylinder?
2013 EB..just changed plugs and coil boots 450 miles ago..got 3 shudders on acceleration which cleared up. MiL was on, cleared it and so far all good. Just wondering in case it happens again.

 

I don't know for sure, but as the coils are labeled A, B, C, D, E, and F; ignition coil B is probably firing cylinder #2, this would be the middle cylinder on the passenger side.

 

I never knew that 🤔
i guess i thought a code for cylinder 2 would have popped up instead of a B..thanks alot. I learned something 😁