Misfires and Lambda Control Stop Error Bank 2??

[Triebwerk]

Does anyone know anything about this lambda control stop bank 2 error code: [Code: 00275E]?

I keep getting misfires and reduced power when I start my car and I haven't been able to find the source of the problem. From the times I've cleared and re-scanned, the misfires seem to be more prevalent on bank 1 but have shown up on cylinders on bank 2 as well. I have tried swapping around the coil packs and changing the spark plugs but the codes didn't seem to change at all. About half the time the car also throws the lambda error code along with the misfire codes. I did some research and it seems that this code is coming from the precat O2 sensor on bank 2. I swapped the precat 02 sensors to see if the code moved to the other bank with it before I ordered some new ones, but to my surprise I kept getting the lambda control stop error on bank 2. Does anyone know why this code wouldn't follow the O2 sensor if it was faulty? Does this code indicate the O2 sensors are likely the source or can it be a symptom from the misfires?

[jdamore]

Out of interest, I googled and found this:
http://wiki.rcollins.org/core/index....r:_275E,_P0175

Perhaps an exhaust leak?

[Triebwerk]

Originally Posted by jdamore

Perhaps an exhaust leak?

I hadn't thought about an exhaust leak because everything sounds and smells fairly normal. That would explain why the code stayed on bank 2 though. Could a small exhaust leak before the cats cause all this trouble?

[yidgyi]

Originally Posted by Triebwerk

I hadn't thought about an exhaust leak because everything sounds and smells fairly normal. That would explain why the code stayed on bank 2 though. Could a small exhaust leak before the cats cause all this trouble?

Yes. That was my issue when I installed a full exhaust. Limp mode, bank 2 or 1 misfiring. I don't remember which bank it was but yes exhaust leaks can cause misfires.