Fault code 2754 - 2011 KW T660

[Mr Hagg]

What I find most of the time is when the dealer R&R the cans they never either:
1) Tight clamps good and you can tell where soot is coming out thereby letting pressure bypass the sensor.

2) They didnt install a new gasket(s) and again you see soot all over.

I have found 1 that the sensor tubes had a whole rub into it. and/or the housing to where the sensor mounts is cracked.

Remember the ECM only knows what its being told so if bad data is received the out come is the same.