RAM 1500 2021, Owner'S Manual, Page: 106 / 461

104 GETTING TO KNOW YOUR INSTRUMENT PANEL
P
REMIUM
I
NSTRUMENT
C
LUSTER
D
ESCRIPTIONS
— D
IESEL
1. Tachometer

Indicates the engine speed in revolutions
per minute (RPM x 1000).
2. Instrument Cluster Display

When the appropriate conditions exist, this
display shows the instrument cluster
display messages
Ú
page 104.

The display always shows one of the main
menu items after ignition on.
3. Speedometer

Indicates vehicle speed.
4. Diesel Exhaust Fluid (DEF) Gauge

The DEF Gauge displays the actual level of
Diesel Exhaust Fluid in the DEF tank. DEF is
required to maintain normal vehicle opera -
tion and emissions compliance. If some -
thing is wrong with the gauge, a DEF
Warning Message or Malfunction Indicator
Light (MIL) will be displayed
Ú
page 115.
NOTE:

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
(3,219 km) in some cases.

The gauge may take up to five seconds to
update after adding a gallon or more of DEF
to the DEF tank. If you have a fault related
to the DEF system, the gauge may not
update to the new level. See an authorized
dealer for service.

The DEF gauge may also not immediately
update after a refill if the temperature of the
DEF fluid is below 12°F (-11°C). 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 condi -
tions, it is possible that the gauge may not
reflect the new fill level for several drives.

Outside temperature can affect DEF
consumption. In cold conditions, 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.
5. Fuel Gauge

The pointer shows the level of fuel in the
fuel tank when the ignition switch is in the
ON/RUN position.

The fuel pump symbol points to the
side of the vehicle where the fuel
filler door is located.
INSTRUMENT CLUSTER DISPLAY
Your vehicle will be equipped with an instrument
cluster display, which offers useful information to
the driver. With the ignition in the OFF mode,
opening/closing of a door will activate the display
for viewing, and display the total miles, or
kilometers, in the odometer. Your instrument
cluster display is designed to display important
information about your vehicle’s systems and
features. Using a driver interactive display located
on the instrument panel, your instrument cluster
display can show you how systems are working and
give you warnings when they are not. The steering
wheel mounted controls allow you to scroll through
the main menus and submenus. You can access
the specific information you want and make
selections and adjustments.