Hi Guys,

I am in need of having my rear O2 sensors deleted out of the ecu. I have my eeprom file I downloaded from the ecu with mpps. Can someone help me? I work on these cars but don't have the know how on what to do with this. Any help would be appreciated.

Marty,

I'm willing to learn how to do this, I'd prefer that. I've been reading the forum and S4wiki, have TunerPro, Winols. I'm not sure exactly where to start or what to do. Do I need a damos file? Wouldn't this just be done through the dtc table?

I'm not asking for a handout, thanks!

Thank you for the reply!!

I already installed spacers but the sensors are dead and I don't want to buy more just to make the system shut up.  So do I just go to those hex locations and zero them out? I am assuming I'd need to checksum the file afterwards?  I agree about the eyeball bleed hahahaaa You are absolutely right about no real support in this area for the 4.2!

Thanks!

Marty,

So if eskonf is 1BCF19, is that the address, map or something else? When I use winols and do a search for 1BCF19 in the hexdump with hex it finds nothing, if in decimal it finds many occurrences. I'm trying to understand how to find it in my in file. Sorry for the dumb noob questions. How exactly do I find ESKONF?

Rear O2 ESKONF
If you intend to disconnect/remove the sensors, the first thing to try is to configure ESKONF (13 bytes starting at 0x10C75):[57]. As a side benefit, even if you still intend to leave the sensors installed and connected, you should not need to disable circuit diagnosis.

ESKONF[5] (0x10C7A) - set to 0xC0 (set bits 6 and 7)
ESKONF[6] (0x10C7B) - set from 0xF3 to 0xFF (M-box) (set bits 2 and 3)
ESKONF[6] (0x10C7B) - set to 0xC3 to 0xCF (L-box) (set bits 2 and 3)

No those are instructions for 7.1 and 7.5 on his Wiki. 7.1.1 is different. Also Marty added in extra something to the ESKONF. Locations of what you needed to change are @ ESKONF - 1037E

2 CELS were @ 1c6bf & 1c6c0

Updated to turn the Rear o2 off and removed the 2 cel's. Also Checksum'd it. Note: Ive never written these roms back on a 7.1.1 ECU without doing it in boot mode. So even though this is the handout you need. you also need to do this with a galleto cable and bootmode. That's what i had to do at least... You might have better luck. Ping me if you brick it

Still going to need bootmode to get the EEPROM off i believe. If you have it great! if you don't then you will need it.

Bootmode can be done by sending me the ECU and ill send it back with an external wire (still need a galleto cable). Or you can do it! there are great write ups here. just doing it so you dont rip the pad off the Board isnt super simple.