SEE POST # 527 -DEF head derate emergency/temporary travel procedure

[brobox]

Originally Posted by aza

I have a 2019 Entegra Anthem with def head failure message. I was told to park that parts might be available by late Aug or September 2021. After reading your article I disconnected the engine input speed sensor as pictured. Nothing happened and the speedometer continued working. I then reconnected and I disconnected the output speed sensor located on tail shaft and it knocked the speedometer out, disabled shifting and forced a transmission error, inhibited gear ranges and locked itself in first gear only. Unable to operate. I could not shift and had to flip breakers to shut the engine down. Am I not following your directions? Can you please explain why you recommend disconnecting the input speed sensor and not the output. Obviously we cannot disconnect output speed sensor.

Thank you for trying and sharing with the rest of us. It sure will be nice if someone found something that did work.

[ARD]

Originally Posted by R.Wold

I don’t think you’re missing anything - I think the passive re-gen suggestion was bad information. After doing whatever repairs are necessary, and clearing codes, some techs will do a forced re-gen just because it might be helpful, so that might be where that idea came from.

Well I am happy to report that the forced regen worked in my case. Spartan was the one to suggest to find a Cummins authorized person to come clear my codes and do a forced regen. Jake of Jake's Diesel is fantastic and he came over and looked at my codes and he also felt that a forced regen would take care of the 3 DEF faults as well as the additional 4th he found that I didn't know about (torque derate). If you are ever in Pagosa Springs, CO he is the one to see. I'm not sure what made my sensors unhappy or what abnormality they detected, but the forced regen did work.

I was concerned about not knowing when the red light, stop engine might happen and as it turns out, I was a step away from that happening. Ya''ll probably know this, but I will share what I learned. Check engine light. 1st warning Check engine light with check mark. 2nd warning. Red light is coming next.

I showed Jake the post about disconnecting the speedometer. He did not feel like that was a good option and was concerned it may compound matters.

[Ljwt330]

Originally Posted by ARD

Well I am happy to report that the forced regen worked in my case. Spartan was the one to suggest to find a Cummins authorized person to come clear my codes and do a forced regen. Jake of Jake's Diesel is fantastic and he came over and looked at my codes and he also felt that a forced regen would take care of the 3 DEF faults as well as the additional 4th he found that I didn't know about (torque derate). If you are ever in Pagosa Springs, CO he is the one to see. I'm not sure what made my sensors unhappy or what abnormality they detected, but the forced regen did work.

I was concerned about not knowing when the red light, stop engine might happen and as it turns out, I was a step away from that happening. Ya''ll probably know this, but I will share what I learned. Check engine light. 1st warning Check engine light with check mark. 2nd warning. Red light is coming next.

I showed Jake the post about disconnecting the speedometer. He did not feel like that was a good option and was concerned it may compound matters.

Thank you for updating and closing the loop. You have helped many others who may find themselves in similar situations.


I, personally, still don't understand the relationship between a forced regen and DEF codes, but I am not a tech. Obviously, it worked for you.



Is there any way you could post the codes that were stored? Most DEF codes reported are related to the DEF head, but there must be other DEF sensors in the system that relate to exhaust temps or exhaust pressure that are influenced by the Diesel Particle Filter. That could explain the regen necessity.

[ARD]

Originally Posted by Ljwt330

Thanks for the confirmation.


One thing though, he never mentioned the tech was going to repair of fix anything, just clear the codes. That makes me think he still is in a risky situation. Hopefully, he will respond and give a bit more detail.

He is a she and there was nothing to fix. He, Jake of Jake's Diesel cleared the codes and started the engine. All the codes came back. Did the forced regen and cleared codes. Turned ignition on and off and drove back to RV Park and no codes came back. He of course checked all my connections as well. I suppose if the forced regen did not work, then we would be looking at replacing parts.

I've had a forced regen done once before a few years ago, but it was a DPF fault saying I needed a new filter which was unlikely, as the coach was only 2 years old. It turned out some matter got stuck in the intake when it was doing a regen while I was driving and that caused the problem.

I've been assured that I can travel safely now. As a fulltimer, I'll be hitting the road again in a few weeks. I guess we will know for sure as I continue my travels.

[Ljwt330]

Originally Posted by ARD

He is a she and there was nothing to fix. He, Jake of Jake's Diesel cleared the codes and started the engine. All the codes came back. Did the forced regen and cleared codes. Turned ignition on and off and drove back to RV Park and no codes came back. He of course checked all my connections as well. I suppose if the forced regen did not work, then we would be looking at replacing parts.

I've had a forced regen done once before a few years ago, but it was a DPF fault saying I needed a new filter which was unlikely, as the coach was only 2 years old. It turned out some matter got stuck in the intake when it was doing a regen while I was driving and that caused the problem.

I've been assured that I can travel safely now. As a fulltimer, I'll be hitting the road again in a few weeks. I guess we will know for sure as I continue my travels.

Sorry for the "he" reference, so many posts that names and avatars get lost in the shuffle.

[ARD]

Originally Posted by Ljwt330

Thank you for updating and closing the loop. You have helped many others who may find themselves in similar situations.


I, personally, still don't understand the relationship between a forced regen and DEF codes, but I am not a tech. Obviously, it worked for you.



Is there any way you could post the codes that were stored? Most DEF codes reported are related to the DEF head, but there must be other DEF sensors in the system that relate to exhaust temps or exhaust pressure that are influenced by the Diesel Particle Filter. That could explain the regen necessity.

I'll check the stored codes and gladly post....not today. I'm giving the pups a break from alarms going off. It's been a rough few days. I didn't even know about the 4th code, torque derate. It showed up on his computer, but when I polled the faults, I showed only 3. I do believe you are correct about DEF sensors that relate to exhaust temps and pressure. I appreciate your feedback. I am learning a lot with this discussion. Thank you. Will post tomorrow.

[ARD]

Originally Posted by Ljwt330

Sorry for the "he" reference, so many posts that names and avatars get lost in the shuffle.

Hahahah. Thanks.😊

[Rev. Roy]

Originally Posted by aza

I have a 2019 Entegra Anthem with def head failure message. I was told to park that parts might be available by late Aug or September 2021. After reading your article I disconnected the engine input speed sensor as pictured. Nothing happened and the speedometer continued working. I then reconnected and I disconnected the output speed sensor located on tail shaft and it knocked the speedometer out, disabled shifting and forced a transmission error, inhibited gear ranges and locked itself in first gear only. Unable to operate. I could not shift and had to flip breakers to shut the engine down. Am I not following your directions? Can you please explain why you recommend disconnecting the input speed sensor and not the output. Obviously we cannot disconnect output speed sensor.

I may not be very nice if they told me that I had to park and wait for parts until maybe ___. Like many others out there, I don't use my RV just for leisure. I travel from church to church and use my RV to stay in at the various locations, often in their parking lot. I have meet doctors, nurses, engineers and many others who travel like us as well.

[zman62]

Originally Posted by brobox

Thank you for trying and sharing with the rest of us. It sure will be nice if someone found something that did work.

The only safe thing to do is carry a spare def. there is no magic fix

[Russtj60]

Originally Posted by zman62

The only safe thing to do is carry a spare def. there is no magic fix

Agreed, but where do you get one?

[ClintH]

Originally Posted by Ljwt330

Question for anyone who knows.

Why would a passive regen be suggested on a coach that has three DEF fault codes? Regens are for DPF issues, as far as I am aware. Clearing the codes will get him rolling, but without a fix for the DEF problems, they will return in short order.

What am I missing?

Do yourself a favor and buy the OTR diagnostic tool. It can clear the def codes so you can get on the road.

[PbdBlue]

Originally Posted by Winepress

ISO doesn’t necessarily guarantee a quality product. As long as you adhere to your written standards / procedures, you can be certified. In other words, you can have a crappy product and still be ISO certified.

Exactly. I was involved in the program to ISO certify the company I was working for at the time. ISO just means you’re following your written procedures. Has nothing to do with the actual quality of your product.

[zman62]

Originally Posted by Russtj60

Agreed, but where do you get one?

Unfortunately it should have been purchased before this situation. Lot of guys were making fun of us that bought them. I feel bad for people stranded but we all have to be self sufficient

[ARD]

Originally Posted by ClintH

Do yourself a favor and buy the OTR diagnostic tool. It can clear the def codes so you can get on the road.

Thanks. I was just reading about them. Looks like they are selling like hotcakes.