2023 JEEP WRANGLER low oil pressure

9
SYMBOL GLOSSARY
Some car components have colored labels with symbols indicating precautions to be
observed when using this component. It is important to follow all warnings when operating
your vehicle. See below for the definition of each symbol
Úpage 116.
NOTE:Warning and Indicator lights are different based upon equipment options and current
vehicle status. Some telltales are optional and may not appear.Red Warning Lights
Air Bag Warning Light
Úpage 117
Brake Warning Light
Úpage 117
Battery Charge Warning Light
Úpage 117
Door Open Warning Light
Úpage 117
Electric Power Steering (EPS) Fault Warning Light
Úpage 118
Electronic Throttle Control (ETC) Warning Light
Úpage 118
Engine Coolant Temperature Warning Light Úpage 118
Hood Open Warning Light
Úpage 118
Oil Pressure Warning Light
Úpage 118
Oil Temperature Warning Light
Úpage 118
Seat Belt Reminder Warning Light
Úpage 118
Swing Gate Open Warning Light
Úpage 119
Transmission Temperature Warning Light
Úpage 119
Vehicle Security Warning Light
Úpage 119
Red Warning Lights
1

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110GETTING TO KNOW YOUR INSTRUMENT PANEL
OIL CHANGE RESET — IF EQUIPPED
Use this QR code to access your digital
experience.
Your vehicle may be equipped with an
engine oil change indicator system.
The “Oil Change Required” message
will display in the instrument cluster
display for five seconds after a single
chime has sounded to indicate the next
scheduled oil change interval. The engine oil change
indicator system is duty cycle based, which means the
engine oil change interval may fluctuate, dependent upon
your personal driving style.
Unless reset, this message will continue to display each
time you place the ignition in the ON/RUN position. To turn
off the message temporarily, push and release the OK
button. To reset the oil change indicator system (after
performing the scheduled maintenance), refer to the
following procedure.
Oil Life Reset

1. Without pushing the brake pedal, place the ignition in the ON/RUN mode (do not start the engine).

2. Navigate to "Oil Life" submenu in "Vehicle Info" in the instrument cluster display.
3. Push and hold the OK button until the gauge resets to
100%. Secondary Method For Oil Change Reset Procedure

1. Without pushing the brake pedal, place the ignition
in the ON/RUN position (do not start the engine).

2. Fully press the accelerator pedal, slowly, three times within ten seconds.
3. Without pushing the brake pedal, place the ignition in the OFF position.
NOTE:If the indicator message illuminates when you start the
vehicle, the oil change indicator system did not reset. If
necessary, repeat this procedure.
DISPLAY AND MESSAGES
The instrument cluster display is located in the center
portion of the cluster and consist of multiple sections:
Main Screen — The inner ring of the display will illumi -
nate in black under normal conditions, yellow for non
critical warnings and red for critical warnings
 Submenu Dots — Whenever there are submenus avail -
able, the position within the submenus is shown here
 Reconfigurable Telltales/Information
 Gear Selector Status (PRND)
 Driver Interactive Display (Compass, Temp, Range to
Empty, Trip A, Trip B, Average Fuel Economy, Current
Fuel Economy and Time)
 Four Wheel Drive (4WD) Status — If Equipped The instrument cluster display will normally display the
main menu or the screens of a selected feature of the
main menu. The main display area also displays pop-up
messages and warning or information messages. These
pop-up messages fall into several categories:

Five Second Stored Messages
When the appropriate conditions occur, this type of
message takes control of the main display area for five
seconds and then returns to the previous screen. Most
of the messages of this type are then stored (as long as
the condition that activated it remains active) and can
be reviewed from the “Messages” main menu item.
Examples of this message type are “Right Front Turn
Signal Lamp Out” and “Low Tire Pressure”.
 Unstored Messages
This message type is displayed indefinitely or until the
condition that activated the message is cleared. Exam -
ples of this message type are “Turn Signal On” (if a turn
signal is left on) and “Lights On” (if driver leaves the
vehicle with the lights on).
 Unstored Messages Until RUN
These messages deal primarily with the Remote Start
feature. This message type is displayed until the igni -
tion is in the RUN state. Examples of this message type
are “Remote Start Canceled - Door Ajar” and “Press
Brake Pedal and Push Button to Start”.
 Five Second Unstored Messages
When the appropriate conditions occur, this type of
message takes control of the main display area for five
seconds and then returns to the previous screen. An
example of this message type is “Automatic High
Beams On”.

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GETTING TO KNOW YOUR INSTRUMENT PANEL111
Messages include the following, but not limited to:
NOTE:Certain messages may require dealer service.
Front Seat Belts Unbuckled Oil Change DueACC Override
Driver Seat Belt Unbuckled Fuel LowCruise Set To XXX mph or km/h
Passenger Seat Belt Unbuckled Service Anti-lock Brake SystemService Shifter
Traction Control Off Service Electronic Throttle ControlTire Pressure Screen With Low Tire(s)
Washer Fluid Low Service Power SteeringService Tire Pressure System
Oil Pressure Low Cruise OffPark Brake Engaged
Oil Level Low – If Equipped Cruise ReadyBrake Fluid Low
Engine Temperature Hot Lights OnRight Front Turn Signal Light Out
Right Rear Turn Signal Light Out Left Front Turn Signal Light OutLeft Rear Turn Signal Light Out
Ignition or Accessory On Vehicle Not In ParkRemote Start Active Push Start Button
Remote Start Canceled Fuel Low Remote Start Canceled Hood OpenRemote Start Canceled Liftgate Open
Remote Start Canceled Door Open Remote Start Canceled Time ExpiredRemote Start Disabled Start To Reset
Service Air Bag System Service Air Bag Warning LightDoor Open
Doors Open Hood OpenVehicle Speed Too High To Shift to D
Liftgate Open Shift Not AllowedVehicle Speed is Too High to Shift to R
Vehicle Speed is Too High to Shift to P Service Transmission
3

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112GETTING TO KNOW YOUR INSTRUMENT PANEL
INSTRUMENT CLUSTER DISPLAY
S
ELECTABLE ITEMS
The instrument cluster display can be used to view the
following main menu items:
NOTE:Depending on the vehicles options, feature settings may
vary.
Speedometer
Push and release the up or down arrow button
until the speedometer menu icon is displayed in the
instrument cluster display. Push and release the OK
button to toggle between MPH and km/h.
Vehicle Info
Push and release the up or down arrow button
until the Vehicle Info menu icon is displayed in the
instrument cluster display. Push and release the left or
right arrow button to scroll through the information
submenus and push and release the OK button to select
or reset the resettable submenus.
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). 
Pitch And Roll
 Displays the pitch and roll of the vehicle in the
graphic with the angle number on the screen.
NOTE:When vehicle speed becomes too high to display the pitch
and roll, “- -” will display in place of the numbers, and the
graphic will be greyed out. A message indicating the
necessary speed for the feature to become available will
also display.
Driver Assist — If Equipped
The Driver Assist menu displays the status of the ACC
systems.
Push and release the up or down arrow button
until the Driver Assist menu is displayed in the instrument
cluster display.
Adaptive Cruise Control (ACC) Feature — If Equipped
The instrument cluster display displays the current ACC
system settings. The information displayed depends on
ACC system status.
Push the ACC ON/OFF button (located on the steering
wheel) until one of the following displays in the instrument
cluster display:
Adaptive Cruise Control Off
When ACC is deactivated, the display will read “Adaptive
Cruise Control Off.”
Adaptive Cruise Control Ready
When ACC is activated but the vehicle speed setting has
not been selected, the display will read “Adaptive Cruise
Control Ready.”
Speedometer
Driver Assist — If
EquippedStop/Start
Vehicle Info Fuel Economy Audio
Off Road Trip Info Messages
Screen Setup Phone Call
Status — If
Equipped
Tire PressureSingle Gauge
Submenu — If
EquippedCritical Level
Logic — If
Equipped
Oil Life Diesel Exhaust
Fluid Level — If
EquippedCoolant
Temperature
Oil Pressure Oil Temperature Transmission
Temperature —
Automatic
Transmission
Only
Battery Voltage

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118GETTING TO KNOW YOUR INSTRUMENT PANEL
Electric Power Steering (EPS) Fault
Warning Light
This warning light will turn on when there's a
fault with the EPS system Úpage 146.
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 (P) 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.
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 (N) and
idle the vehicle. If the temperature reading does not return
to normal, turn the engine off immediately and call for
service
Úpage 300.
Hood Open Warning Light
This indicator 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.
Oil Pressure Warning Light
This warning light will illuminate, and a chime
will sound, to indicate low engine oil pressure.
If the light and chime turn on while driving,
safely stop the vehicle and turn off the engine as soon as possible. After the vehicle is safely stopped,
restart the engine and monitor the Oil Pressure Warning
Light. If the Oil Pressure Warning Light is still illuminated,
turn the engine OFF and contact an authorized dealer for
further assistance. Do not operate the vehicle until the
cause is corrected. If the light is no longer illuminated, the
engine can be operated but it is recommended to take the
vehicle to an authorized dealer as soon as possible.
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.
Seat Belt Reminder Warning Light
This warning light indicates when the driver or
passenger seat belt is unbuckled. When the
ignition is first placed in the ON/RUN or ACC/
ON/RUN position and if the driver’s seat belt is
unbuckled, a chime will sound and the light will turn on.
When driving, if the driver or front passenger seat belt
remains unbuckled, the Seat Belt Reminder Light will flash
or remain on continuously and a chime will sound
Úpage 261.
WARNING!
Continued operation with reduced assist could pose a
safety risk to yourself and others. Service should be
obtained as soon as possible.

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130STARTING AND OPERATING
NORMAL STARTING
Observe the instrument cluster lights when starting the
engine.
NOTE:Normal starting of either a cold or a warm engine is
obtained without pumping or pressing the accelerator
pedal.

1. Always apply the parking brake.

2. Press and hold the brake pedal while pushing the
ENGINE START/STOP button once.
NOTE:A delay of the start of up to five seconds is possible under
very cold conditions. The Wait to Start telltale will be illumi -
nated during the preheat process. When the engine Wait
To Start telltale goes off the engine will automatically
crank.
3. The system will automatically engage the starter to crank the engine. If the vehicle fails to start, the
starter will disengage automatically after 25 seconds.
4. If you wish to stop the cranking of the engine prior to the engine starting, push the ENGINE START/STOP
button again. 5. Check that the Oil Pressure Warning Light has turned
off.
6. Release the parking brake.
STARTING FLUIDS
The engine is equipped with a glow plug preheating
system. If the instructions in this manual are followed, the
engine should start in all conditions and no type of starting
fluid should be used.
NORMAL OPERATION — DIESEL ENGINE
Observe the following when the diesel engine is operating:
 All message center lights are off.
 Malfunction Indicator Light (MIL) is off.
 Engine Oil Pressure telltale is not illuminated.
 Voltmeter operation.
The voltmeter may show a gauge fluctuation at various
engine temperatures. This is caused by the glow plug
heating system. The number of cycles and the length of
the cycling operation is controlled by the engine control
module. Glow plug heater operation can run for several
minutes. Once the heater operation is complete, the
voltmeter needle will stabilize.
CAUTION!
If the Water in Fuel Indicator Light remains on, DO NOT
START the engine before you drain the water from the
fuel filters to avoid engine damage
Úpage 321.
WARNING!
 Do not leave children or animals inside parked vehi -
cles in hot weather. Interior heat buildup may cause
serious injury or death.
 When leaving the vehicle, always make sure the
keyless ignition node is in the OFF position, remove
the key fob from the vehicle and lock the vehicle.
 Never leave children alone in a vehicle, or with
access to an unlocked vehicle. Allowing children to
be in a vehicle unattended is dangerous for a
number of reasons. A child or others could be seri -
ously or fatally injured. Children should be warned
not to touch the parking brake, brake pedal or the
gear selector.
 Do not leave the key fob in or near the vehicle, or in
a location accessible to children, and do not leave
the ignition of a vehicle equipped with Keyless
Enter ‘n Go™ in the ACC or ON/RUN position. A child
could operate power windows, other controls, or
move the vehicle.

23_JL_OM_EN_USC_t.book Page 130

STARTING AND OPERATING131
COLD WEATHER PRECAUTIONS
Operation in ambient temperature below 32°F (0°C) may
require special considerations. The following charts
suggest these options:
Fuel Operating Range
NOTE:Use Ultra Low Sulfur Diesel (ULSD) Fuels ONLY.

Fuel Operating Range Chart

*Number 1 ULSD Fuel should only be used where extended arctic
conditions 0°F (-18°C) exist.
NOTE:
Use of Climatized ULSD Fuel or Number 1 ULSD Fuel
results in a noticeable decrease in fuel economy.
 Climatized ULSD Fuel is a blend of Number 2 ULSD
Fuel and Number 1 ULSD Fuel which reduces the
temperature at which wax crystals form in fuel.
 The fuel grade should be clearly marked on the pump
at the fuel station.
 The engine requires the use of Ultra Low Sulfur Diesel
Fuel . Use of incorrect fuel could result in engine and
exhaust system damage
Úpage 371.
 If climatized or Number 1 ULSD Fuel is not available,
and you are operating below 20°F (-6°C), in sustained
arctic conditions, Mopar® Premium Diesel Fuel Treat -
ment (or equivalent) is recommended to avoid gelling
(see Fuel Operating Range Chart).
Engine Oil Usage
See Engine Fluids and Lubricants for the correct engine oil
viscosity Úpage 374.
Winter Front Cover
A Winter front or cold weather cover can be used in
ambient temperatures below 32°F (0°C), especially
during extended idle conditions. This cover is equipped
with four flaps for managing total grille opening in varying
ambient temperatures. If a Winter front or cold weather
cover is to be used, the flaps should be in the full open
position to allow air flow to the cooling module and automatic transmission oil cooler. When ambient
temperatures drop below 0°F (-17°C) the four flaps need
to be closed. A suitable cold weather cover is available
from a Mopar® dealer.
Engine Warm-Up
Avoid full throttle operation when the engine is cold. When
starting a cold engine, bring the engine up to operating
speed slowly to allow the oil pressure to stabilize as the
engine warms up.
If temperatures are below 32°F (0°C), operate the engine
at moderate speeds for five minutes before full loads are
applied.
ENGINE IDLING
Avoid prolonged idling. Long periods of idling may be
harmful to your engine because combustion chamber
temperatures can drop so low that the fuel may not burn
completely. Incomplete combustion allows carbon and
varnish to form on piston rings, cylinder head valves, and
injector nozzles. Also, the unburned fuel can enter the
crankcase, diluting the oil and causing rapid wear to the
engine.
4

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132STARTING AND OPERATING
STOPPING THE ENGINE
After full load operation, idle the engine for a few minutes before shutting it down. This idle period will allow the lubricating oil and coolant to carry excess heat away from the
turbocharger.
NOTE:Refer to the following chart for proper engine shutdown.
NOTE:Under certain conditions the engine fan will run after the
engine is turned off. These conditions are under high load
and high temperature conditions.
COOLING SYSTEM TIPS — AUTOMATIC
T
RANSMISSION
To reduce the potential for engine and transmission
overheating in high ambient temperature conditions, take
the following actions:
 City Driving — When stopped, shift the transmission
into NEUTRAL (N) and increase engine idle speed.
 Highway Driving — Reduce your speed. 
Up Steep Hills — Select a lower transmission gear.
 Air Conditioning — Turn it off temporarily.
NOTE:If the coolant temperature is too high, the A/C will auto -
matically turn off.
Do Not Operate The Engine With Low Oil
Pressure
If the Oil Pressure Warning Light turns on while driving,
stop the vehicle and shut down the engine as soon as
possible. A chime will sound when the light turns on. After
the vehicle is safely stopped, restart the engine and
monitor the Oil Pressure Warning Light. If the Oil Pressure
Warning Light is still illuminated, turn the engine OFF and contact an authorized dealer for further assistance. If the
lamp is no longer illuminated, the engine can be operated
but it is recommended to take the vehicle to an authorized
dealer as soon as possible.
NOTE:Do not operate the vehicle until the cause is corrected.
This light does not show how much oil is in the engine. The
engine oil level must be checked under the hood.
Driving Condition Load Turbocharger Temperature Idle Time (min.) Before Engine Shutdown
Stop and Go EmptyCoolNone
Stop and Go Medium 0.5
Highway Speeds MediumWarm 1.0
City Traffic Maximum GCWR 1.5
Highway Speeds Maximum GCWR 2.0
Uphill Grade Maximum GCWR Hot2.5
CAUTION!
If oil pressure falls to less than normal readings, shut
the engine off immediately. Failure to do so could result
in immediate and severe engine damage.

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