Why does my diesel need DEF?

Posted on 2/19/2019



DEF is urea that helps clean the exhaust before it's released from your vehicle. DEF stands for diesel exhaust fluid just in case you were wondering. If your vehicle has the system on it, then it's required for the engine to run correctly. There is a difference between the three systems and the type of fluid so if you're refilling it on your own just make sure you have the right stuff for it. 


2012 was the last year that it wasn't federally mandated that you had to have a DEF system on your diesel vehicle. Ford and Chevy both went to the DEF systems before it was mandated and Dodge switched in 2013. 


If you have questions give us a call at 541-791-2886 and we would be happy to help out. 


Happy Adventures,


Heather

By jhautoinc December 12, 2025
They help prevent excess engine wear.
By jhautoinc December 9, 2025
This is why your car isn't warming up properly.
By jhautoinc December 3, 2025
It's an important component.
By jhautoinc November 28, 2025
This requires some testing...
By jhautoinc November 26, 2025
A bit of maintenance can save you.
By jhautoinc November 21, 2025
This is why an oil change is so important
By jhautoinc November 18, 2025
It's not always the seal that's the issue.
By jhautoinc November 14, 2025
A brake inspection can prevent this.
By jhautoinc November 12, 2025
It's more important than you think.
By jhautoinc November 8, 2025
Is it age or an issue?