C63-AMG

Thanks for that info. Finding the fuse layout was a pain. I agree, obviously grasping at straws. It goes into the service center on the 6th.

C63-AMG

Just a quick update on this issue. It turned out that the O2 sensors where not only crossed, bank 1/2 but they were in the wrong positions, basically flipped.

Once the service tech at European Auto Solutions figured out, the CEL was cleared.

Just wish the cables below had been marked (R)right (L)left, etc.

Thanks to everyone that commented on what to check and for.

LoFox

I had the exact same issue with my MBH exhaust (with CATs) install, the shop had bank 1 and bank 2 wires crossed the flipped (wideband O2 was incorrectly installed in the post CAT O2 slot.)

faz492

This is the issue with my ride right now, its throwing this code as well as another for "open circuit left bank"
I cant find a solution.

LoFox

Hmm, I'd recommend trying to address the P0040 code first, its possible that the "open circuit" code could be a red herring and might resolve itself. If the open circuit error persists then it might be a bad O2 or some kind of wiring problem.