Disable O2 sensor MS41.0

busterhax · **Joined:** Wed Jan 22, 2014 6:54 pm **Posts:** 1773

ba114 wrote:

mrf582 wrote:

When Single Channel O2 is selected, the Bank 2 stuff is ignored. Hope that clears up your confusion.

So essentially if i wanted to run single channel O2 in my turbo setup, yet retain the rear O2 ecu input for logging of a wideband O2 i would do the below:
- Control bit 6: 1 channel feedback
- Change acceptable ranges for voltage input using below:

234/234 Catalytic Converter Overall Efficiency Bank N

Code:

00 @ 0386h 
FF @ 037Eh
FFFF @ 00EBh

225/226 Cat Efficiency Bank N

Code:

FF @0390h, 
00 @0391h 

- disable catalyst efficiency DTCs

Code:

0 @0237h.

info sourced from:
http://www.romraider.com/forum/viewtopic.php?p=113035#p113035

Or is that information no longer relevant with DTCs 79,61 and 77,78 disabled?

Disabling that DTC essentially makes the o2 sensor plug optional. If something is plugged in- it will function and throw a code if no cats are present. If nothing is plugged in- it will not care.
So if you are going to have something plugged in, it won't make any difference if you have 0x237h on or off.

As far as the rest of it-give it a shot and report back. None of us have tried.

ba114 · **Joined:** Wed Oct 21, 2015 2:36 am **Posts:** 980

busterhax wrote:

M52Drifter wrote:

BMW_3xx_i wrote:

did you clear adaptations after unpluging 02 sensors ?

Yes, after flashing I clear adaptations with INPA.

busterhax wrote:

Either post your file or post a stock version of your file and so that it can be determined which byte disables your PRIMARY o2 sensor(s).

Okay, this is the stock file from my M52b28.
Thank you.

Try 0x260 change to 00h.

this is only for MS41.0?

Soft325 · **Posted:** Fri Sep 16, 2016 10:52 am

Hello help me disable o2 sensors in this file. Like a euro 0 in stok from winkpf.

M52Drifter · **Joined:** Sun Sep 06, 2015 2:16 pm **Posts:** 144

Does anyone know where are located DTC for O2 sensors heater and voltage upstream on 41.0 ? DTC 25,55,75,76

busterhax · **Joined:** Wed Jan 22, 2014 6:54 pm **Posts:** 1773

M52Drifter wrote:

Does anyone know where are located DTC for O2 sensors heater and voltage upstream on 41.0 ? DTC 25,55,75,76

Start screwing around with the array of "02" values. It'll roughly be in the same area of the array as it is in 41.1/2.

M52Drifter · **Joined:** Sun Sep 06, 2015 2:16 pm **Posts:** 144

busterhax wrote:

M52Drifter wrote:

Does anyone know where are located DTC for O2 sensors heater and voltage upstream on 41.0 ? DTC 25,55,75,76

Start screwing around with the array of "02" values. It'll roughly be in the same area of the array as it is in 41.1/2.

That's what I'm searching in the 02 values, comparing with 41.1/.2 but not sure exactly about which one it is.

busterhax · **Joined:** Wed Jan 22, 2014 6:54 pm **Posts:** 1773

M52Drifter wrote:

busterhax wrote:

M52Drifter wrote:

Does anyone know where are located DTC for O2 sensors heater and voltage upstream on 41.0 ? DTC 25,55,75,76

Start screwing around with the array of "02" values. It'll roughly be in the same area of the array as it is in 41.1/2.

That's what I'm searching in the 02 values, comparing with 41.1/.2 but not sure exactly about which one it is.

That's why I said to start screwing around with it. 00 out half of the array and see if the specific DTC is gone. If it is, 00 half of that half and so on until you narrow it down. With less than 1 minute per flash, you could have found them all by now.

M52Drifter · **Joined:** Sun Sep 06, 2015 2:16 pm **Posts:** 144

Yes that is what I will have to do, just wondering if someone would have done it before.

beef68 · **Joined:** Wed Aug 27, 2014 7:23 pm **Posts:** 10

Is the 260h location for both partial and fullread as I have different values in each location?

busterhax · **Joined:** Wed Jan 22, 2014 6:54 pm **Posts:** 1773

beef68 wrote:

Is the 260h location for both partial and fullread as I have different values in each location?

No.

viewtopic.php?f=42&t=13054

ijd8wn2k19 · **Joined:** Thu Mar 10, 2016 7:08 am **Posts:** 108

busterhax wrote:

beef68 wrote:

Is the 260h location for both partial and fullread as I have different values in each location?

No.

viewtopic.php?f=42&t=13054

So when we 00 the byte at 0x260 to disable
Should we do anything in terms of changing the values for byte 6 or do we just leave that as is

Also I can find byte 260 in hex bin and change ease enough but how do I find it in rr as I read it's safer to make all changes in rr

kondzio310 · **Posted:** Fri Jul 27, 2018 5:04 am

Is that all to change to turn off primary lambda feedback? Ms41.0, 24KB bin file.
It can't be so easy...

Nedim · **Joined:** Sat Jun 29, 2019 10:08 am **Posts:** 86

kondzio310 wrote:

Is that all to change to turn off primary lambda feedback? Ms41.0, 24KB bin file.
It can't be so easy...

Did you tried it? Is this the solution for 02 off?

BlastinBlanks · **Joined:** Mon Jul 19, 2021 2:41 pm **Posts:** 101

Im second guessing myself.... which one is the plug for bank 1 upstream?

Sent from my iPhone using Tapatalk

ba114 · **Joined:** Wed Oct 21, 2015 2:36 am **Posts:** 980

Bank 1 (cyls 1-3) - plug closest to firewall
Bank 2 (cyls 4-6) - plug closest to front of car

RomRaider

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Disable O2 sensor MS41.0

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