Dodge RAM 2017, Owner'S Manual, Page: 170 / 228

two natural components of the air we breathe. You can
operate with the comfort that your vehicle is contributing
to a cleaner, healthier world environment for this and
generations to come.
System Overview
This vehicle is equipped with a Diesel Exhaust Fluid (DEF)
injection system and a Selective Catalytic Reduction (SCR)
catalyst to meet the emission requirements.
The DEF injection system consists of the following compo-
nents:
•
DEF tank
•
DEF pump
•
DEF injector
•
Electronically-heated DEF lines
•
DEF control module
•
NOx sensors
•
Temperature sensors
•
SCR catalyst
•
UQS Sensor
The DEF injection system and SCR catalyst enable the
achievement of diesel emissions requirements; while main-
taining outstanding fuel economy, drivability, torque and
power ratings.
Refer to
⬙
Instrument Cluster Display” in “Understanding
Your Instrument Panel” for system messages and warn-
ings.
NOTE:
•
Your vehicle is equipped with a DEF injection system.
You may occasionally hear an audible clicking noise.
This is normal operation.
•
The DEF pump will run for a period of time after engine
shutdown to purge the DEF system. This is normal
operation.
168 STARTING AND OPERATING