Keep Your Diesel Exhaust Fluid From Voiding Your Warranty

Keep Your Diesel Exhaust Fluid From Voiding Your Warranty

Did you know that using incorrect or contaminated Diesel Exhaust Fluid (DEF) will void your warranty? With the SCR system in today’s trucks, DEF has become an important fluid in our industry, so it’s an important thing to know.

How do you keep your warranty intact in regards to DEF? Here are a few things to be aware of:

  1. DEF has a shelf life of around 18 months if stored correctly. Storing DEF in temperatures above 77°F DEF will significantly lower its shelf life.
  2. DEF must always be stored in approved containers.
  3. DEF fluid must always meet the correct specification for your vehicle.
  4. If storing your vehicle for long periods, it should be tested periodically. Water, dirt and other contaminants will ruin DEF.

Refer to the blog post  “What’s Up With My Exhaust Fluid?” for a few items to look for in contaminated DEF systems.

Detailed DEF storage, handling, disposal & testing information can be found in Mitchell1 TruckSeries suite of repair information for Class 4-8 trucks.

About the Author

Sam Wallace

Sam Wallace joined the Commercial Vehicle Group at Mitchell 1 in 2011 and is an associate editor for the TruckLabor product. He is ASE certified in automotive and medium/heavy truck and previously worked as both a technician and assistant manager at a repair shop. Sam holds associate degrees in automotive technology and general studies from Southwestern Community College.