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Old 06-23-2021, 11:40 AM   #1
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DEF derate/speedometer disconnect ?

We were looking around on the forum and are starting to have nightmares with worries about the dreaded DEF head failure since we have some trips not for pleasure that have to be made we canít just sit in one place.

We noticed some non-Entegra owners group mentioned an Entegra Owner Forum post about disconnecting the speedometer sensor to stop from being derated... is this possible ? If so... how, where do we do this?

Sorry if this have been covered already ... we are terrible at finding things by searching on this forum.

Thank you for the help,
Steve and Daphne
2018 Anthem 44B
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Old 06-23-2021, 01:56 PM   #2
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By most accounts does not work with Allison (automatic) transmission. Limited to manual transmission trucks. Keep searching, lot of info on this site.
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Old 06-23-2021, 02:13 PM   #3
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I can't find the post, but it was just tried on an Entegra with a bad DEF head. It does not work on Allison Automatic transmissions. It locked the Allison up to where all it had was first gear. The entire chassis had to be reboot to get the transmission working again.
So far none of the internet work arounds have worked without replacing the DEF head


Found the post:

https://www.irv2.com/forums/f103/def...ml#post5794083
Person that tried it on an Entegra
https://www.irv2.com/forums/f103/def...ml#post5794418
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Old 06-23-2021, 02:27 PM   #4
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Quote:
Originally Posted by Xpress21 View Post
We were looking around on the forum and are starting to have nightmares with worries about the dreaded DEF head failure since we have some trips not for pleasure that have to be made we canít just sit in one place.

We noticed some non-Entegra owners group mentioned an Entegra Owner Forum post about disconnecting the speedometer sensor to stop from being derated... is this possible ? If so... how, where do we do this?

Sorry if this have been covered already ... we are terrible at finding things by searching on this forum.

Thank you for the help,
Steve and Daphne
2018 Anthem 44B
Frankly, now is the time to find out. Find and disconnect your speed sensor then take your coach for a test ride. I believe you will find you will have shift problems but I don't know for sure. I also don't know if it will override a degrade. I do know if your transmission is stuck in low gear the "fix" isn't going to work for you.
To me this degrade is a safety hazard in every sense of the word. There has to be a better way of warning drivers of an upcoming failure without slowing their vehicle down in a heavy traffic situation and putting lives and property in danger. A note or letter and an E Mail to the EPA and NHTSC might open some eyes if they truly care about human life and property. Contact your state representatives and let them know what is going on. The more this information is spread about the better chance of getting this issue resolved before it takes someone's life. This doesn't just simply include a few RV's out on the highways. Should one of these time bombs go off on a busy interstate during rush hour it could lead to a massive pileup.
Like the old saying goes. "The life you save may be your own".
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Old 06-23-2021, 03:41 PM   #5
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Quote:
Originally Posted by Xpress21 View Post
We were looking around on the forum and are starting to have nightmares with worries about the dreaded DEF head failure since we have some trips not for pleasure that have to be made we canít just sit in one place.

We noticed some non-Entegra owners group mentioned an Entegra Owner Forum post about disconnecting the speedometer sensor to stop from being derated... is this possible ? If so... how, where do we do this?

Sorry if this have been covered already ... we are terrible at finding things by searching on this forum.

Thank you for the help,
Steve and Daphne
2018 Anthem 44B

I was the one who posted a youtube video in which a trucker said you could disconnect the speed sensor to bypass. Several Posters have since said it will not work on Motor Homes.


https://youtu.be/TeQfNFZT9Lw
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Old 06-23-2021, 03:47 PM   #6
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Somebody please find a workaround!!! with all the technology out youíre telling me that thereís not some kind of computer bypass for this or something?
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Old 06-23-2021, 03:54 PM   #7
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Thank you everyone

Well bad news but thank you to all your responses!
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Old 06-23-2021, 05:57 PM   #8
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Somebody please find a workaround!!! with all the technology out you’re telling me that there’s not some kind of computer bypass for this or something?
It went to committee this afternoon and they agreed. They want to thank you for volunteering.
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Old 06-23-2021, 06:33 PM   #9
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It went to committee this afternoon and they agreed. They want to thank you for volunteering.
Chuck


While he is at it let him call these guys to see if thier system works.
https://truckecmtunes.com/cummins-dpf-egr-def-scr-delete.html.

I keep thinking somebody knows how to do this.
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Old 06-23-2021, 06:48 PM   #10
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Chuck


While he is at it let him call these guys to see if thier system works.
https://truckecmtunes.com/cummins-dp...cr-delete.html.

I keep thinking somebody knows how to do this.
I'm sure multiple somebodies know how to do it. But...

From the web site cited in your post above:

"All products are intended for off-road use in competition only, and are not to be used on public roads or highways."

And their more detailed "Disclaimer" includes the following language:

"Off-highway tunes(DPF-EGR-CGI-DEF-UREA-SCR... deletes) are intended for off-road use in competition only, and are not to be used on public roads or highways. The BUYER is responsible to obey all applicable federal, state, and local laws, statutes, and ordinances when operating his/her vehicle(including emission related laws), and the BUYER agrees to hold SELLER(and its employees, directors, successors, sub-contractors, business associates, affiliates) harmless from any violation thereof. Under no circumstances will the SELLER(us) be liable for any damage, expenses or personal injury incurred by reason of the use, sale or test of any kind of product.

Any ECM that we tune for our dealers(online), MUST be labeled with a sticker, which will inform that the ECM is intended for OFFROAD-RACING usage only, and that it is not intended for on highway use. We don't sell any of our product to final customers, we only sell them to our dealers. The dealers are obligated to inform final customer about the terms of the disclaimer, off-road racing usage only...and all other aspects of our agreement with them.

Please make sure that You've read & understood this warning before installing or purchasing any of products."

Even with all that, they could still end up with the Feds on their you-know-what if word leaked out that they or their dealers were doing modifications like these on motorhomes, which are clearly not off-road or racing vehicles.

The disclaimers quoted above remind me of years ago when catalytic converters first started appearing on cars and light trucks. Some enterprising individuals in southern California (where I lived at the time) started selling exhaust tubing with the appropriate end pieces and lengths to fit exactly where the catalytic converter was installed on a given vehicle. And they marketed their devices as a "test kit" which included instructions on how to remove the catalytic converter and replace it with the "test" pipe.

As you might expect they included an advisory to remove the "test" pipe and reinstall the catalytic converter once the "test" was completed. As you also might expect, most of their customers ran really long tests. I'm not saying I ever did anything like that, but I might have known a few guys who did...
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Old 06-23-2021, 09:10 PM   #11
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Larry, I just sent an email to OTRPerformance.com asking if their reset tool would reset the derate. Their marketing material implies that it will so I asked them if it will and if so for how long. I’ll post whatever they say, but…
Have you seen where anyone else might have already tried it? Something in the back of my mind is thinking the name is familiar.
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Old 06-24-2021, 05:44 AM   #12
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In reading, it seems that if you were to delete the sensors that are causing the derate you are also stopping the regen. Once you stop the regen then the filter starts plugging up which will then start a whole new set of problems.

Question, When the def head throws the codes does that mean it has stopped working or that just the communication to the ecm has gone bad.
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Old 06-24-2021, 08:55 AM   #13
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Originally Posted by Turbojack View Post
In reading, it seems that if you were to delete the sensors that are causing the derate you are also stopping the regen. Once you stop the regen then the filter starts plugging up which will then start a whole new set of problems.

Question, When the def head throws the codes does that mean it has stopped working or that just the communication to the ecm has gone bad.
Regen has to do with the Diesel Particle Filter, not the DEF head or DEF sensors. There may be some relationship between clogged DPF and a DEF code being generated somewhere downstream from the DEF header which is in the tank, but it has not been made clear.


The major issue being discussed is faulty DEF headers and their sensors, and the disconnecting of the speed sensor at the transmission has been shown not to work on an automatic Allison transmission, which all the RVs in these situations have.
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Old 06-24-2021, 09:56 AM   #14
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Question, When the def head throws the codes does that mean it has stopped working or that just the communication to the ecm has gone bad.
The DEF head sensor monitors three things:

1) Volume of DEF in the tank. Fault Code 1761 if low.

2) Temperature of DEF in the tank. Fault Code 3031 if out of range.

3) Quality of DEF in the tank. Fault Code 3364 if bad.

If you get only one of those fault codes, you can assume it's valid. When you get all three at the same time, it's a virtual certainty the DEF head sensor has failed and needs to be replaced.
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