P0040 CEL Code
Thread Starter
Member
Joined: Mar 2013
Posts: 199
Likes: 3
From: Boston or North Carolina
2009 C63 2016 AMG GT S
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.
Thread Starter
Member
Joined: Mar 2013
Posts: 199
Likes: 3
From: Boston or North Carolina
2009 C63 2016 AMG GT S
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.
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.
Member
Joined: Jul 2014
Posts: 82
Likes: 23
C63
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.
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.
Senior Member
Joined: Apr 2014
Posts: 425
Likes: 15
e63 amg w212 6.3
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.
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.
I cant find a solution.
Member
Joined: Jul 2014
Posts: 82
Likes: 23
C63
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.
Member
Joined: Feb 2010
Posts: 158
Likes: 0
From: San Antonio, Texas
2010 P31 Obsidian; 1990 ZX11
Reviving an old thread...
Originally had the code (forgot which one exactly) indicating bank 1 sensor 1 upstream had failed. Replaced both upstream sensors (because of vehicle's age and mileage) on this past Friday and am now receiving the P0040 error code. I used the OEM sensors from Bosch, part number 17016. Car is a 2010 and has over 140,000 miles as my daily driver.
On December 4, 2018, the OP on this thread posted an update and mentioned a "wrong position" to fix the code issue, but not sure what "wrong position" meant or how that fixed the issue..
I have MBH headers, installed in 2017, with no CATS and have never had an O2 sensor issue before. A follow up OBD also now shows P2414 and P2196. Neither of those were in the original OBD scan before I replaced with the Bosch OEM sensors.
Any ideas on how to resolve? Should I replace both down streams also? Will that perhaps clear the codes?
TIA
On December 4, 2018, the OP on this thread posted an update and mentioned a "wrong position" to fix the code issue, but not sure what "wrong position" meant or how that fixed the issue..
I have MBH headers, installed in 2017, with no CATS and have never had an O2 sensor issue before. A follow up OBD also now shows P2414 and P2196. Neither of those were in the original OBD scan before I replaced with the Bosch OEM sensors.
Any ideas on how to resolve? Should I replace both down streams also? Will that perhaps clear the codes?
TIA
