Freightliner posts article about DEF heads in Newsletter...

[Richpatty]

Here is the link to their newsletter.

https://www.fcocrv.org/wp-content/uploads/2024/09/FCCC1241-RV-Soul_Fall-2024.pdf

See page 5.

 

[Jim]

Good to know, Rich, thank you!

 

[SteveMA]

Seems the testing section is going to be a problem. they list a certified tester near us who is in a "auto center" parking lot that is almost too small for my F250 PU truck....

 

[Rich W.]

A few errors in that article, a couple rather glaring, but it is a club publication. The recall, if it ever happens, should be quite interesting.

 

[schachlemd]

Question: So you build a DSS have a failure, use the DSS and then go to Freightliner for the covered repair under warranty. Does the ECM show that the system was bypassed? Would it be a reason to have the warranty voided? Never seen a reliable answer to this question.

 

[DennisT]

The DSS does not bypass the system - the only thing it does is tell the computer everything is ok so you don’t get de-rated etc.

System still works, Def still used, etc.

The DSS is authorized by the government as a temporary solution to the failures. Does not void any warranty that I have ever read about.

 

[Rich W.]

Question: So you build a DSS have a failure, use the DSS and then go to Freightliner for the covered repair under warranty. Does the ECM show that the system was bypassed? Would it be a reason to have the warranty voided? Never seen a reliable answer to this question.

I can’t say this is 100% reliable re the warranty, but the ECM is not affected and doesn’t “know” what you did. It receives a signal from the DSS telling it the tank is 3/4 full and quality and temp are ok and goes on business as usual.

The issue with the emissions warranty I’ve seen is shops either not knowing or possibly intentionally not informing the customer that the emissions warranty is 5 years/100k miles. I’ve had to force the issue and have educated quite a few others on the subject.

In the countless discussions I’ve had on this both pre and post use of the DSS I have never heard this concern voiced. And since the alternative is being stranded or towed, I would use the DSS and get where I’m going and schedule an apointment at my convenience. You would also want to disconnect the DSS once at the shop so that their diagnostics would recognize the problem. So really there is no reason for the FL shop to even know about it.

 

[schachlemd]

I can’t say this is 100% reliable re the warranty, but the ECM is not affected and doesn’t “know” what you did. It receives a signal from the DSS telling it the tank is 3/4 full and quality and temp are ok and goes on business as usual.

In the countless discussions I’ve had on this both pre and post use of the DSS I have never heard this concern voiced. And since the alternative is being stranded or towed, I would use the DSS and get where I’m going and schedule an apointment at my convenience. You would also want to disconnect the DSS once at the shop so that their diagnostics would recognize the problem. So really there is no reason for the FL shop to even know about it.

Thanks so much for the quick response. That was the answer I was hoping for. Just bought this 40 foot monster and have been really paranoid about the DEF issue. Got the parts and built a DSS. As easy as it was I really don't know why anyone would travel without one. Take care

 

[schachlemd]

The DSS does not bypass the system - the only thing it does is tell the computer everything is ok so you don’t get de-rated etc.

System still works, Def still used, etc.

The DSS is authorized by the government as a temporary solution to the failures. Does not void any warranty that I have ever read about.