Removing DEF system?

BiggMaNN59 · Apr 19, 2015

Has anyone or can you remove DEF system from vehicle? I know it probably would void warranty but no hassle anymore either. I know a guy who removed it from his Chevy 4x4 after multiple times in shop and now is worry free.

highway star · Apr 19, 2015

Since you know someone that did it, it would appear someone has and you can... ???

xiggi · Apr 19, 2015

what vehicle are you wanting to do it on. It's not just removing the system it involves a computer reprogram.

BiggMaNN59 · Apr 19, 2015

I was just wondering how big a deal it is. I bought the 2014 Promaster diesel and had major problems with def and I now have gas PM. Could I have had def system removed from my diesel PM and would it still run ok.

highway star · Apr 19, 2015

From what I've heard and read, some engines respond well to it and others not so much. In the big truck world, there are people that did it and then when they went to a dealership with it were told they wouldn't get the truck back until it was returned to factory specs. Big bucks... You may want to seek out forums for the Promaster to see if it can be done to yours.

fastman_1 · Apr 19, 2015

BiggMaNN59 said:
I was just wondering how big a deal it is. I bought the 2014 Promaster diesel and had major problems with def and I now have gas PM. Could I have had def system removed from my diesel PM and would it still run ok.

I've heard of sprinters and a few dura max guys have done it, with no problems, as for the PM, I think it's to new yet for anybody to get brave enough to experiment with.

xiggi · Apr 19, 2015

If it's something a person has done your not going to be able to trade the vehicle in at a dealer. Also like hs alluded to you better watch were it is serviced. Another thing is a mechanic does an update on your cpu and you have new issues

BiggMaNN59 · Apr 19, 2015

I don't have my diesel PM now and I really like the gas version I have now. All potential issues mentioned would not be worth it to me.

Boss man 54 · Apr 19, 2015

Yes the def system can be deleted. I just had it done on a 2011 mx paccar. It shows that it was done at the factory.

BiggMaNN59 · Apr 19, 2015

When you say it shows it was done at factory does that mean it was able to be programmed to show that?

Boss man 54 · Apr 19, 2015

Yes, it still has all components they def tank stays full and I am no longer having regin issues. When it is hooked up to a computer it looks factory set. I had warranty work done after I had deleted.