RAM RAM 2500, Quick Reference Manual

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• You may occasionally hear an audible click-
ing from the DEF system. This is normal
operation.
• The sealed bottles and vented fill adapters
available from your RAM dealer are designed
to ensure proper filling. Non-sealed bottles
and/or non-vented fill adapters, may be
available from other sources will require spe-
cial care to avoid overfilling.
• If DEF is spilled, it should be cleaned up
with mild soap and water to avoid corrosion
or damage to components and finished sur-
faces. For this reason, transporting DEF in
the cab of your truck is not recommended.
• You can receive assistance in locating DEF
by calling 1-866-RAM-INFO.
Adding Diesel Exhaust Fluid (DEF)
The DEF gauge (located in the instrument clus-
ter) will display the level of DEF remaining in
the tank.
Completely fill the DEF tank through the diesel
exhaust fluid fill location at every maintenance
interval, or before if prompted by the instru-
ment cluster display.
The DEF tank on these vehicles is designed
with a large amount of full reserve. So, the level
sensor will indicate a full reading even before
the tank is completely full. To put it another
way, there’s additional storage capacity in the
tank above the Full mark that’s not represented
in the gauge. You may not see any movement in
the
reading – even after driving up to
2,000 miles (3,220 km) in some cases.
NOTE:
• Driving conditions (altitude, vehicle speed,
load, etc.) will affect the amount of DEF that
is used in your vehicle.
• Another factor is that outside temperature
can affect DEF consumption. In cold condi-
tions, 12°F (-11°C) and below, the DEF
gauge needle can stay on a fixed position
and may not move for extended periods of
time. This is a normal function of the
system.
• Since DEF will begin to freeze at 12°F
(-11°C), your vehicle is equipped with an
automatic DEF heating system. This allows
the DEF injection system to operate properly
at temperatures below 12°F (-11°C). If your
vehicle is not in operation for an extended
period of time with temperatures below 12°F
(-11°C), the DEF in the tank may freeze. If