Diesel Exhaust Fluid - RAM 2500 2020 Owner's Manual

Fill Locations And Funnel Usage
1 — Diesel Exhaust Fluid (DEF) Fill Location
2 — Emergency Diesel Fuel Fill Funnel
3 — Diesel Fuel Fill Location
NOTE:
Ensure funnel is inserted fully to hold flapper
door open.
3. Pour fuel into funnel opening.
4. Remove funnel from filler pipe, clean off
prior to putting back in the jack kit.
WARNING!
Never have any smoking materials lit in or

near the vehicle when the fuel door is open
or the tank is being filled.
WARNING! (Continued)
Never add fuel when the engine is running.

This is in violation of most state and federal
fire regulations and may cause the
"Malfunction Indicator Light" to turn on.
A fire may result if fuel is pumped into a

portable container that is inside of a
vehicle. You could be burned. Always place
fuel containers on the ground while filling.
To avoid fuel spillage and overfilling, do not
"top off" the fuel tank after filling.
D E
IESEL XHAUST
Your vehicle is equipped with a Selective
Catalytic Reduction (SCR) system to meet the
very stringent diesel emissions standards
required by the Environmental Protection
Agency.
The purpose of the SCR system is to reduce
levels of NOx (oxides of nitrogen emitted from
engines) that are harmful to our health and the
environment to a near-zero level. A small
quantity of Diesel Exhaust Fluid (DEF) is
(Continued)
CAUTION!
F
LUID
STARTING AND OPERATING
injected into the exhaust upstream of a catalyst
where, when vaporized, it converts
smog-forming nitrogen oxides (NOx) into
harmless nitrogen (N2) and water vapor (H2O),
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 components:
DEF tank

DEF pump

DEF injector

Electronically-heated DEF lines

DEF control module

NOx sensors

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