single turbo f80 m3 o2 sensor codes

[dermann]

So ive been working on this single turbo m3 and I cant seem to figure out what the problem is. I am getting codes for o2 sensors (pictured) even though I moved both bank 1 primary and secondary to the downpipe, plugged the holes on the manifold, and loaded a base single turbo tune with the mhd single bank fueling option enabled. I have no idea what im doing wrong but the car has 160 hp and when I give it more gas it throws a code with the knock sensor. I have the mpr1200 kit and I have a motiv reflex paired with a mac solenoid. Is it a tune thing or are the o2 sensors bad? Im at a dead end so any help would be greatly appreciated.

[dms-01]

Just guessing but google returns this:

https://f87.bimmerpost.com/forums/sh...4&postcount=27

Seeing as how both of yours are throwing codes maybe it is just lack of complete connection at the harness? That is if its not tune related.

[dermann]

Just checked. Mine are both fully in. I know for sure because I have messed with them when I did catless downpipes on the car and I never had sensor issues. My only guess is those codes are referring to the bank 2 sensors which are not in the car, due to single bank fueling.

[b_w.]

I am replacing mine yearly. FCP Euro FTW.

[pxscu]

I believe I had to get one of my sensors I wasn't using coded out even with single bank enabled. But I've burned my downstream O2 out twice now. Enabling cold start to see if that helps anything..

[Zoomz_7]

Originally Posted by pxscu

I believe I had to get one of my sensors I wasn't using coded out even with single bank enabled. But I've burned my downstream O2 out twice now. Enabling cold start to see if that helps anything..

This is my 3rd time killing my secondary o2 sensors on my single turbo setup. Any luck with enabling cold start? Mine is also disabled.

[pxscu]

Originally Posted by Zoomz_7

This is my 3rd time killing my secondary o2 sensors on my single turbo setup. Any luck with enabling cold start? Mine is also disabled.

so far so good.. but I just put a new one in and am testing the theory so not enough time yet