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 February 20, 2026
They can cause a lot of damage
By jhautoinc February 17, 2026
That streaking can lead to bigger problems
By jhautoinc February 12, 2026
That light is important.
By jhautoinc February 3, 2026
You want this to work properly.
By jhautoinc January 30, 2026
These are vital to keep you safe on the road.
By jhautoinc January 27, 2026
Your engine will thank you.
By jhautoinc January 23, 2026
They help keep your engine cool.
By jhautoinc January 20, 2026
They need maintenance to keep them running.
By jhautoinc January 17, 2026
It's better for your engine. 
By jhautoinc January 13, 2026
They are more important than you know.