DEF Fill Procedure
1. Remove cap from DEF tank (located behind the fuel door on driver’s side of the
vehicle).
2. Insert DEF container or fill nozzle into
DEF fill location and fill DEF tank.
NOTE:
• The DEF gauge may take up to five
seconds to update after adding a
gallon or more of Diesel Exhaust
Fluid (DEF) to the DEF tank. If you
have a fault related to the DEF sys-
tem, the gauge may not update to
the new level. See your authorized
dealer for service.
• The DEF gauge may also not imme-
diately update after a refill if the
temperature of the DEF fluid is be-
low 12F (-11C). The DEF line heater
will possibly warm up the DEF fluid
and allow the gauge to update after
a period of run time. Under very cold
conditions, it is possible that the
gauge may not reflect the new fill
level for several drives.
3. Reinstall cap onto DEF tank.
Refer to the Diesel Supplement at www.ramtrucks.com/en/owners/manuals for fur-
ther details.
CAUTION!
• To avoid DEF spillage, and possible damage to the DEF tank from overfilling, do
not “top off” the DEF tank after filling.
• DO NOT OVERFILL. DEF will freeze below 12ºF (-11ºC). The DEF system is
designed to work in temperatures below the DEF freezing point, however, if the
tank is overfilled and freezes, the system could be damaged.
• When DEF is spilled, clean the area immediately with water and use an
absorbent material to soak up the spills on the ground.
• Do not attempt to start your engine if DEF is accidentally added to the diesel fuel
tank as it can result in severe damage to your engine, including but not limited
to failure of the fuel pump and injectors.
Fill Locations
1 — Diesel Exhaust Fluid (DEF)
Fill Location
2 — Diesel Fuel Fill Location
1 5 0 0 3 . 0 L D I E S E L
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