Hi Guys,

I have an evo 9 EDM 2006,the firmware is 88840016.
The vehicle is running with a decat fujitsubo exhaust and I need to delete the rear O2 to fit in its place a wideband.
Can someone help in this matter ?

Thanks in advance

 

https://www.evolutionm.net/forums/sh...d.php?t=268138

Try searching next time.

 

To begin with, I appreciate your reply.
But what I needed is to disable the diagnostic of the rear O2 heater too, cause I don't want any resistor to heat up and burn it's surrounding ...

 

If all you want to do is run a wide band, leave the o2 in place and buy a 7.00 bung off e-bay and put it where you want on the exhaust--that way nothing to disable, and you get what it is you after.

 

you need the correct XML for your rom to go into the ecu options and find the corresponding bit and disable it (turning the 1 to a 0)

 

I wasn't trying to be a smartass sorry if it came off that way. Mrfred (Mychailo) wrote a thread about wiring in a resistor in place of the o2 sensor. The OP is correct that of you disable the o2 via periphery bit it will still throw a check engine light because of the lack of resistance in the circuit. You could go to radio shack and get a little plastic box and wire up the resistor and circuit and then stick it under the passenger seat where the o2 comes through. It would be clean and not throw any engine codes at all. But I have to agree with meckert that of all you are trying to do is install a wideband then leave the rear o2 in place and weld a bung onto the downpipe or somewhere up there. Way easier.

 

FAA bit 1 disables rear 02 and heater CEL but has the adverse effect of disabling long term fuel trims.

 

I uploaded "88840016-nlts-mod-v2" and removed the rear O2 completely drove for around 50K and till now no Pcode was thrown in my face .
I hope that this is the solution.
P.S: I checked the peripherybit (1) FAA and strangely it was on 0 not 1.
Anyway I'll update if anything else goes wrong.

Cheers

 

Yes, setting to zero disables rear 02 and heater, 1 enables it. I think you will see that your LTFTs are stuck at zero. It's not a big deal though.