Diesel Exhaust Fluid - Dodge RAM 1500 Owner's Manual

292 MAINTAINING YOUR VEHICLE
CAUTION!
See your authorized dealer, as damage to the exhaust
system could occur soon with continued operation.
Exhaust Filter Full — Power Reduced See Dealer
The PCM derates the engine to limit the likelihood of
permanent damage to the after-treatment system. If this
condition is not corrected and a dealer service is not
performed, extensive exhaust after-treatment damage
can occur. To correct this condition it will be necessary to
have your vehicle serviced by your local authorized
dealer.
CAUTION!
See your authorized dealer, as damage to the exhaust
system could occur soon with continued operation.

Diesel Exhaust Fluid

Diesel Exhaust Fluid (DEF) sometimes known simply by
the name of its active component, UREA—is a key
component of selective catalytic reduction (SCR) systems,
which help diesel vehicles meet stringent emission regu-
lations. DEF is a liquid reducing agent that reacts with
engine exhaust in the presence of a catalyst to convert
smog-forming nitrogen oxides (NOx) into harmless ni-
trogen and water vapor.
Refer to "Fluids, Lubricants, and Genuine Parts" in
"Maintaining Your Vehicle" for further information.
You can receive assistance in locating DEF in the United
States by calling 866-RAM-INFO (866-726-4636). In
Canada call 1–800–465–2001 (English) or 1–800–387–9983
(French)