Want to remove/disable your rear O2 sensor without a CEL? Here's how..

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May 12, 2008 | 02:56 PM

#286

alan678

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From: La Jolla, CA

I turned on my car about 5 times today since I wrote the fix to the ECU and everything seems to be working great, no CEL here at all! The code would usually come up after the second start after deleting the CEL from the ECU...so far its all good...

Here is my screen shot:

Name: MonitorAfterHeaterFix.png
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Name: MonitorAfterHeaterFix.png
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Size: 186.2 KB

Last edited by alan678; May 12, 2008 at 03:02 PM.

May 12, 2008 | 03:07 PM

#287

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by alan678

Yeah, I'm thinking that with the exact same stock value of EFDF as Evo 9s, E7DF should work for 8s.

May 12, 2008 | 03:27 PM

#288

andrewzaragoza

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From: DFW, TX

if the status is "not done" will it pass the readiness check?

May 12, 2008 | 03:29 PM

#289

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by andrewzaragoza

if the status is "not done" will it pass the readiness check?

Nope. That's why I need to find the code that affects the readiness check.

May 14, 2008 | 12:12 PM

#290

alan678

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From: La Jolla, CA

Quote:

Originally Posted by alan678

Seems like Periphery2 for ROM ID 96940011 reads the same stock value as above (EFDF) I changed mine to the updated value (E7DF) and will report back later on today...

I have noticed that usually different ROM IDs carry different values for things such as 2 byte load, 2 byte RPM, etc....should I be worried that this code above was for ROM ID 88590015 or are the Periphery codes universal for the USDM Evos?

BTW...I am also using the Rear o2 sim patch for my ROM ID found in this link... https://www.evolutionm.net/forums/sh...d.php?t=333820

Still going good! No o2 sensor plugged in....the two different patched applied.....no CEL

May 15, 2008 | 07:28 PM

#291

23r0k001

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From: Raliegh, North Carolina

so which sim patch works with the sensor plugged in for the evo 9 with rom id 88590015? so im clear...

May 15, 2008 | 07:37 PM

#292

alan678

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From: La Jolla, CA

Quote:

Originally Posted by 23r0k001

so which sim patch works with the sensor plugged in for the evo 9 with rom id 88590015? so im clear...

I believe its the Tephra Mod V5 that has the Sim Patch for that ROM ID...

May 15, 2008 | 07:39 PM

#293

andrewzaragoza

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From: DFW, TX

Quote:

Originally Posted by mrfred

Nope. That's why I need to find the code that affects the readiness check.

I see.. so its only to prevent the cel from poping up without having the resistor connected. thanks.

May 15, 2008 | 07:56 PM

#294

EvoBroMA

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From: MA

Quote:

Originally Posted by 23r0k001

so which sim patch works with the sensor plugged in for the evo 9 with rom id 88590015? so im clear...

https://www.evolutionm.net/forums/sh...&postcount=148

May 15, 2008 | 08:04 PM

#295

Eric06

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From: Panama City, FL

Nice little trick.

May 15, 2008 | 08:28 PM

#296

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by 23r0k001

so which sim patch works with the sensor plugged in for the evo 9 with rom id 88590015? so im clear...

Just to help a little more... tephra's ROM uses the sim patch I posted in the thread that dexmix references, so either way you go, the result is the same.

May 15, 2008 | 11:30 PM

#297

mountainturbo

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From: WVC, UT

Quote:

Originally Posted by mountainturbo

I tried this with my 96940011 rom and I'm still getting a CEL. Unfortunately I can't get scantech to work on this laptop for some reason (probably 'cause of vista), so I could have another code being thrown now, but last time I checked I didn't have any other codes.

So let me know if it works for you, I really want this to work!

Just a quick update, used a different laptop with XP on it, was able to read & clear the codes, and the CEL hasn't come on since! (Knock on wood... lol)

Thanks mrfred!

May 20, 2008 | 09:42 AM

#298

taavisev

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From: Estonia

Is it possible that for rom 88840017 is the right value 89DF to 81DF anybody ho can check the code please look at that is this the right value!

thanx

May 20, 2008 | 09:57 AM

#299

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by taavisev

Is it possible that for rom 88840017 is the right value 89DF to 81DF anybody ho can check the code please look at that is this the right value!

thanx

What are you trying to do?

May 20, 2008 | 10:11 AM

#300

taavisev

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From: Estonia

Quote:

Originally Posted by mrfred

What are you trying to do?

I disconnect my O2 and trying to disable the Heater check!

I just looked into the IDA and i´m new in it and want to be sure that this value is right!

Last edited by taavisev; May 20, 2008 at 10:14 AM.