Hello and jp

[rjetodd]

Hello all, thanks for adding me to the group.
I just purchased a 2017 Ram 1500 Eco Diesel with 74k miles. I cannot add DEF to the DEF tank, it backs up in the filler neck. Is there a typical blockage or does the neck break down and block it?
Need help figuring it out. Thanks.

 

[Tremper126]

There’s an in tank flapper that could be partially stuck

 

[rjetodd]

There’s an in tank flapper that could be partially stuck

Thanks. Anyway to free it up without taking out the filler hoses?

 

[Tremper126]

Not that I’m aware of unfortunately. It’s relatively easy to drop the tank, and was able to disconnect the house without any fancy tools

 

[Tremper126]

You may be able to pull the fender liner and access it that way

 

[PLEHMAN]

Hello all, thanks for adding me to the group.
I just purchased a 2017 Ram 1500 Eco Diesel with 74k miles. I cannot add DEF to the DEF tank, it backs up in the filler neck. Is there a typical blockage or does the neck break down and block it?
Need help figuring it out. Thanks.

If you're trying to fill it at a service station pump, forget it. I have had a 2015 and now a 2020 and it simply will not take it fast enough from a pump. The only way I can get it in is to buy the 2 1/2 gal cardboard boxes and pour it in manually. Poor design.