Ram Trucks 2011 Chassis Cab - Diesel Supplement - Manual (Page 92)

The DEF injection system and SCR catalyst enable the
achievement of diesel emissions requirements; while
maintaining outstanding fuel economy, drivability,
torque and power ratings.
Refer to “Electronic Vehicle Information Center
(EVIC)” in “Understanding Your Instrument Panel” for
system messages and warnings.
NOTE: The DEF pump will run for a period of time
after engine shutdown to purge the DEF system. This is
normal operation.
90 STARTING AND OPERATING