2023 RAM CHASSIS CAB coolant level

94GETTING TO KNOW YOUR INSTRUMENT PANEL
Vehicle Info
Push and release the up or down arrow
button until the Vehicle Info menu item is
highlighted in the instrument cluster display. Push
and release the right arrow button to enter the
submenus items of Vehicle Info. Follow the
directional prompts to access or reset any of the
following Vehicle Info submenu items:
BASE AND MIDLINE CLUSTER
Tire Pressure Monitor System
Coolant Temperature — If Equipped
Trans Temperature — If Equipped
Oil Temperature
Oil Pressure
Exhaust Brake — If Equipped
Boost Pressure — If Equipped
Diesel Particulate Filter
Oil Life
Fuel Filter Life — If Equipped
Battery Voltage — If Equipped
Gauge Summary — If Equipped
Coolant Temp
Trans Temp
Oil Temp
Oil Pressure
Engine Hours — If Equipped
PREMIUM CLUSTER
Fuel Economy
Average
Current
Range to Empty
Gauge Summary
Coolant Temperature — If Equipped
Battery Voltage — If Equipped
Trans Temperature
Oil Summary
Oil Temperature
Oil Life
Oil Pressure — If Equipped
Tire Pressure Monitor System
Diesel Summary
Exhaust Brake — If Equipped
Boost Pressure — If Equipped
Fuel Filter Life — If Equipped
Diesel Particulate Filter
Fuel Tank Levels
Engine Hours — If Equipped
Off Road
Push and release the up or down arrow
button until the Off Road menu icon is displayed in
the instrument cluster display. Push and release
the left or right arrow button to scroll
through the information submenus.
Drivetrain
Front Wheel Angle: displays the graphical
and numerical value of calculated average
front wheel angle from the steering wheel
orientation.
Transfer Case Lock Status: displays “Lock”
graphic only during 4WD High, 4WD High
Part Time, 4WD Low status.
Axle Lock And Sway Bar Status (If
Equipped): displays front and rear or rear
only axle locker graphic, and sway bar
connection graphic with text message
(connected or disconnected).

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100GETTING TO KNOW YOUR INSTRUMENT PANEL
Engine Power Reduced Up To 2 Min (Minutes)
During Warm-up — This message will display
during start-up when the ambient temperature
is -25°F (-32°C) and below.
Your vehicle is equipped with an engine warm
up protection feature that may limit engine
performance after cold starting at low ambient
temperatures. The length of time engine speed
is limited is dependent upon engine coolant
temperature. Engine speed may be briefly
limited to 1,000 RPM after starting with coolant
temperature below freezing conditions, and
may be limited to 1,000 RPM for up to approxi -
mately two minutes under more severe cold
conditions.
Coolant Low — This telltale will turn on to indi -
cate the vehicle coolant level is low
Ú page 353.
Diesel Exhaust Fluid (DEF) Warning
Messages
There are four different messages which are
displayed if the vehicle detects that the DEF
system has been filled with a fluid other than DEF,
has experienced component failures, or when
tampering has been detected. The vehicle may be
limited to a maximum speed of 5 mph (8 km/h) if
the DEF system is not serviced within less than
200 miles (322 km) of the fault being detected. When the DEF system needs to be serviced the
following warnings will display:


DEF Low Refill Soon

— This message will display
when the low level is reached, during vehicle start
up, and with increased frequency during vehicle
operation. It will be accompanied by a single
chime. Approximately 5 gallons (19 Liters) of DEF
is required to refill the tank when this message is
initially displayed on pickup applications, and
approximately 7 gallons (26 Liters) are required
on chassis-cab applications.

Speed Limited to 5 MPH in XXX mi Refill DEF —
This message will continuously display if the
“DEF Low Refill Soon” message is ignored, and
the frequency of occurrence of the chime will
increase unless up to 2 gallons (7.5 Liters) of
DEF is added to the tank.
5 MPH Max Speed on Restart, Long Idle or
Refuel Refill DEF — This message will continu -
ously display when the counter reaches zero,
and will be accompanied by a periodic chime.
The vehicle will only be capable of a maximum
speed of 5 mph upon the first of the following
conditions to occur:
If the vehicle is shutoff and restarted.
If the vehicle is idled for an extended period
of time, approximately one hour or greater.
If the system detects that the level of fuel in
the tank has increased. Add a minimum of 2 gallons (7.5 Liters) of DEF
to the tank in order to avoid vehicle operation at
a maximum speed of 5 mph (8 km/h).
NOTE:A minimum of 2 gallons (7.5 Liters) may be
required to restore normal vehicle operation.
Although the vehicle will start normally and can be
placed in gear after this message has been initially
displayed, extreme caution should be utilized since
the vehicle will only be capable of maneuvering at
a maximum speed of 5 mph (8 km/h).
Diesel Exhaust Fluid (DEF) Fault Warning
Messages
There are five different messages which are
displayed if the vehicle detects that the DEF
system has been filled with a fluid other than DEF,
has experienced component failures, or when
tampering has been detected. The vehicle may be
limited to a maximum speed of 5 mph (8 km/h) if
the DEF system is not serviced within less than
200 miles (322 km) of the fault being detected.
When the DEF system needs to be serviced the
following warnings will display:
Service DEF System See Dealer — This message
will display when the fault is initially detected,
each time the vehicle is started, and periodically
during driving. The message will be accompa -
nied by a single chime. We recommend you

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104GETTING TO KNOW YOUR INSTRUMENT PANEL
Hood Open Warning Light
This warning light will illuminate when the
hood is ajar/open and not fully closed.
NOTE:If the vehicle is moving, there will also be a single
chime.
Vehicle Security Warning Light —
If Equipped
This light will flash at a fast rate for
approximately 15 seconds when the
vehicle security system is arming, and
then will flash slowly until the vehicle
is disarmed.
Engine Coolant Temperature Warning
Light
This warning light warns of an
overheated engine condition. If the
engine coolant temperature is too high,
this indicator will illuminate and a single
chime will sound. If the temperature reaches the
upper limit, a continuous chime will sound for four
minutes or until the engine is able to cool,
whichever comes first.
If the light turns on while driving, safely pull over
and stop the vehicle. If the Air Conditioning (A/C)
system is on, turn it off. Also, shift the transmission
into NEUTRAL and idle the vehicle. If the temperature reading does not return to normal,
turn the engine off immediately and call for service
Ú
page 335.
Battery Charge Warning Light
This warning light will illuminate when the
battery is not charging properly. If it stays
on while the engine is running, there may
be a malfunction with the charging
system. Contact an authorized dealer as soon as
possible.
This indicates a possible problem with the
electrical system or a related component.
Oil Pressure Warning Light
This warning light will illuminate to
indicate low engine oil pressure. If the
light turns on while driving, stop the
vehicle, shut off the engine as soon as
possible, and contact an authorized dealer. A
chime will sound when this light turns on.
Do not operate the vehicle until the cause is
corrected. This light does not indicate how much oil
is in the engine. The engine oil level must be
checked under the hood.
Oil Temperature Warning Light
This warning light will illuminate to
indicate the engine oil temperature is
high. If the light turns on while driving,
stop the vehicle and shut off the engine as soon as possible. Wait for oil temperature to
return to normal levels.
Electronic Throttle Control (ETC) Warning
Light
This warning light will illuminate to
indicate a problem with the ETC system.
If a problem is detected while the vehicle
is running, the light will either stay on or
flash depending on the nature of the problem.
Cycle the ignition when the vehicle is safely and
completely stopped and the transmission is placed
in the PARK position. The light should turn off. If
the light remains on with the vehicle running, your
vehicle will usually be drivable; however, see an
authorized dealer for service as soon as possible.
NOTE:This light may turn on if the accelerator and brake
pedals are pressed at the same time.
If the light continues to flash when the vehicle is
running, immediate service is required and you
may experience reduced performance, an
elevated/rough idle, or engine stall and your
vehicle may require towing. The light will come on
when the ignition is placed in the ON/RUN or ACC/
ON/RUN position and remain on briefly as a bulb
check. If the light does not come on during starting,
have the system checked by an authorized dealer.

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GETTING TO KNOW YOUR INSTRUMENT PANEL107
Low Fuel Warning Light
When the fuel level reaches
approximately 3.2 gal (12 L) this light will
turn on, and remain on until fuel is
added.
A single warning chime will sound with Low Fuel
Warning.
Low Coolant Level Warning Light
This telltale will turn on to indicate the
vehicle coolant level is low Ú page 353.
Loose Fuel Filler Cap Warning Light —
If Equipped
This warning light will illuminate when the
fuel filler cap is loose. Properly close the
filler cap to disengage the light. If the
light does not turn off, please see an
authorized dealer.
Tire Pressure Monitoring System (TPMS)
Warning Light — If Equipped
The warning light switches on and a
message is displayed to indicate that the
tire pressure is lower than the
recommended value and/or that slow
pressure loss is occurring. In these cases, optimal
tire duration and fuel consumption may not be
guaranteed. Should one or more tires be in the condition
previously mentioned, the display will show the
indications corresponding to each tire.
Each tire, including the spare (if provided), should
be checked monthly when cold and inflated to the
inflation pressure recommended by the vehicle
manufacturer on the vehicle placard or tire
inflation pressure label. If your vehicle has tires of
a different size than the size indicated on the
vehicle placard or tire inflation pressure label, you
should determine the proper tire inflation pressure
for those tires.
As an added safety feature, your vehicle has been
equipped with a TPMS that illuminates a low tire
pressure telltale when one or more of your tires is
significantly underinflated. Accordingly, when the
low tire pressure telltale illuminates, you should
stop and check your tires as soon as possible, and
inflate them to the proper pressure. Driving on a
significantly underinflated tire causes the tire to
overheat and can lead to tire failure. Underinflation also reduces fuel efficiency and tire tread life, and
may affect the vehicle’s handling and stopping
ability.
Please note that the TPMS is not a substitute for
proper tire maintenance, and it is the driver’s
responsibility to maintain correct tire pressure,
even if underinflation has not reached the level to
trigger illumination of the TPMS low tire pressure
telltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the system
is not operating properly. The TPMS malfunction
indicator is combined with the low tire pressure
telltale. When the system detects a malfunction,
the telltale will flash for approximately one minute
and then remain continuously illuminated. This
sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists. When
the malfunction indicator is illuminated, the
system may not be able to detect or signal low tire
pressure as intended. TPMS malfunctions may
occur for a variety of reasons, including the
installation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS from
functioning properly. Always check the TPMS
malfunction telltale after replacing one or more
tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow
the TPMS to continue to function properly.
CAUTION!
Do not continue driving with one or more flat
tires as handling may be compromised. Stop the
vehicle, avoiding sharp braking and steering. If a
tire puncture occurs, repair immediately using
the dedicated tire repair kit and contact an
authorized dealer as soon as possible.
3

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STARTING AND OPERATING121
(Continued)
STARTING PROCEDURE — ENGINE
M
ANIFOLD AIR TEMPERATURE BELOW
0°F (-18°C)
In extremely cold weather below 0°F (-18°C) it
may be beneficial to cycle the intake air heater
twice before attempting to start the engine. This
can be accomplished by turning the ignition to OFF
position for at least five seconds and then back to
the ON/RUN position after the Wait To Start
Indicator Light has turned off, but before the
engine is started. However, excessive cycling of the
intake air heater will result in damage to the heater
elements or reduced battery voltage.
NOTE:If multiple pre-heat cycles are used before starting,
additional engine run time may be required to
maintain battery state of charge at a satisfactory
level.

1. If the engine stalls after the initial start, the
ignition must be turned to the OFF position for
at least five seconds and then to the ON/RUN
position to recycle the intake air heater.

NOTE:Excessive white smoke and poor engine perfor -
mance will result if intake air heater is not recycled.
2. Heat generated by the intake air heater dissipates rapidly in a cold engine. If more than
two minutes pass between the time the Wait To Start Indicator Light turns off and the
engine is started, recycle the intake air heater
by turning the ignition switch to the OFF
position for at least five seconds and then
back to the ON/RUN position.
3. If the vehicle is driven and vehicle speed exceeds 19 mph (31 km/h) before the intake
air heater post-heat (after start) cycle is
complete, the intake air heater will shut off.
4. If the engine is cranked for more than 10 seconds, the post-heat cycle will turn off.
NOTE:
Engine idle speed will automatically increase to
1,000 RPM and engage the Variable Geometry
Turbocharger at low coolant temperatures to
improve engine warm-up.
When a diesel engine is allowed to run out of
fuel or the fuel gels at low temperatures, air is
pulled into the fuel system. If your engine has
run out of fuel Ú page 363.
If the engine stalls, or if the ignition switch is left
on for more than two minutes after the Wait To
Start Indicator Light goes out, reset the intake
air heater by turning the ignition switch to the
OFF position for at least five seconds and then
back to the ON/RUN position. Repeat steps 1
through 5 of “Starting Procedure – Engine Mani -
fold Air Temperature 0°F to 60°F (-18°C to
19°C).”
STARTING FLUIDS
The engine is equipped with an automatic electric
air preheating system. If the instructions in this
manual are followed, the engine should start in all
conditions.
WARNING!
Starting fluids or flammable liquids must never
be used in the Cummins® diesel engine (see
Warning label). Never pour diesel fuel,
flammable liquid, starting fluids (ether) into the
air cleaner canister, air intake piping, or
turbocharger inlet in an attempt to start the
vehicle. This could result in a flash fire and
explosion causing serious personal injury and
engine damage.
WARNING!
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat build-up
may cause serious injury or death.
When leaving the vehicle, always remove the
key fob and lock your vehicle.
4

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128STARTING AND OPERATING
ENGINE BREAK-IN RECOMMENDATIONS —
DIESEL ENGINE
The Cummins® Turbo Diesel engine does not
require a break-in period due to its construction.
Normal operation is allowed, providing the
following recommendations are followed:
Warm up the engine before placing it under
load.
Do not operate the engine at idle for prolonged
periods.
Use the appropriate transmission gear to
prevent engine lugging.
Observe vehicle oil pressure and temperature
indicators.
Check the coolant and oil levels frequently.
Vary throttle position at highway speeds when
carrying or towing significant weight.
NOTE:Light duty operation such as light trailer towing or
no load operation will extend the time before the
engine is at full efficiency. Reduced fuel economy
and power may be seen at this time.
For additional vehicle break-in requirements
Úpage 186. Because of the construction of the Cummins®
Turbo Diesel engine, engine run-in is enhanced by
loaded operating conditions which allow the
engine parts to achieve final finish and fit during
the first 6,000 miles (10,000 km).
PARKING BRAKE
Before leaving the vehicle, make sure that the
parking brake is fully applied. Also, be certain to
leave the transmission in PARK.
The foot operated parking brake is located below
the lower left corner of the instrument panel. To
apply the parking brake, firmly push the parking
brake pedal fully. To release the parking brake, pull
the parking brake release handle.

Parking Brake Release
When the parking brake is applied with the ignition
switch ON, the Brake Warning Light in the
instrument cluster will illuminate.
NOTE:
When the parking brake is applied and the
transmission is placed in gear, the Brake
Warning Light will flash. If vehicle speed is
detected, a chime will sound to alert the driver.
Fully release the parking brake before
attempting to move the vehicle.
This light only shows that the parking brake is
applied. It does not show the degree of brake
application.
When parking on a hill, it is important to turn the
front wheels toward the curb on a downhill grade
and away from the curb on an uphill grade. Apply
the parking brake before placing the gear selector
in PARK, otherwise the load on the transmission
locking mechanism may make it difficult to move
the gear selector out of PARK. The parking brake
should always be applied whenever the driver is
not in the vehicle.

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264MULTIMEDIA
REGULATORY AND SAFETY
I
NFORMATION
US/CANADA
Exposure to Radio Frequency Radiation
The radiated output power of the internal wireless
radio is far below the FCC and IC radio frequency
exposure limits. Nevertheless, the wireless radio
will be used in such a manner that the radio is
8 inches (20 cm) or further from the human body.
The internal wireless radio operates within
guidelines found in radio frequency safety
standards and recommendations, which reflect
the consensus of the scientific community.
The radio manufacturer believes the internal
wireless radio is safe for use by consumers. The
level of energy emitted is far less than the
electromagnetic energy emitted by wireless
devices such as mobile phones. However, the use
of wireless radios may be restricted in some
situations or environments, such as aboard
airplanes. If you are unsure of restrictions, you are
encouraged to ask for authorization before turning
on the wireless radio Ú page 427.
OFF-ROAD PAGES — IF EQUIPPED
Your vehicle may be equipped with Off-Road Pages
which display vehicle information related to the
drivetrain, transfer case, and coolant/oil gauges.
To access Off-Road Pages, press the Vehicle
button on the touchscreen, select the Offroad tab,
and then select the OFF ROAD button on the main
screen. Off-Road Pages can also be accessed
through the app drawer.

Off-Road Button

23_DPF_OM_EN_USC_t.book Page 264

SERVICING AND MAINTENANCE343
Once A Month Or Before A Long Trip:
Check engine oil level.
Rotate tires at the first sign of irregular wear,
even if it occurs before the oil indicator system
turns on.
Check windshield washer fluid level.
Check the fluid levels of the coolant reservoir,
brake master cylinder and power steering and
fill as needed.
Check function of all interior and exterior lights. At Each Oil Change

Change the engine oil and filter.
Inspect the exhaust system.
Check tire pressure and look for unusual wear
or damage. Rotate tires at the first sign of irreg -
ular wear, even if it occurs before the oil indi -
cator system turns on.
Inspect the batteries, and clean and tighten the
terminals as required.
Inspect the CV/Universal joints.
Inspect brake pads, shoes, rotors, drums, hoses
and parking brake.
Inspect engine cooling system protection and
hoses.
Inspect front end, and lubricate — If equipped
with serviceable fittings.
Inspect engine air cleaner filter if using in dusty
or off-road conditions. If required, replace
engine air cleaner filter.
Inspect and replace the Evaporative System
Fresh Air Filter as necessary, replacement may
be more frequent if vehicle is operated in
extreme dusty conditions.
Inspection and service should also be performed
anytime a malfunction is observed or suspected.
Retain all receipts.
NOTE:Using white lithium grease, lubricate the door
hinge pivot joints twice a year to prevent
premature wear.
8

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