2023 JEEP GLADIATOR service

GETTING TO KNOW YOUR INSTRUMENT PANEL121
INSTRUMENT CLUSTER DESCRIPTIONS

1.
Tachometer
Indicates the engine speed in revolutions
per minute (RPM x 1000).
2. Temperature Gauge
The temperature gauge shows engine
coolant temperature. Any reading within the
normal range indicates that the engine
cooling system is operating satisfactorily.
The gauge pointer will likely indicate a
higher temperature when driving in hot
weather, up mountain grades, or when
towing a trailer. It should not be allowed to
exceed the upper limits of the normal oper -
ating range. 3.
Instrument Cluster Display
The instrument cluster display features a
driver interactive display Ú page 121.
4. 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 Ú page 191.
5. Speedometer
Indicates vehicle speed.
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 (kilometers)
in the odometer. Your instrument cluster display is
designed to display important information about
your vehicle’s systems and features. The driver
interactive display, located in the instrument
panel, indicates how systems are operating and
gives you warnings when a system, or systems,
needs your attention. The steering wheel mounted
controls allow you to scroll through and enter the
main menus and submenus. You can access the
specific information you want to make selections
and adjustments.
CAUTION!
Do not operate the engine with the tachometer
pointer in the red area. Engine damage will
occur.
WARNING!
A hot engine cooling system is dangerous. You or
others could be badly burned by steam or boiling
coolant. It is recommended that you call an
authorized dealer for service if your vehicle
overheats.
CAUTION!
Driving with a hot engine cooling system could
damage your vehicle. If the temperature gauge
reads “H” pull over and stop the vehicle. Idle the
vehicle with the air conditioner turned off until
the pointer drops back into the normal range. If
the pointer remains on the “H”, turn the engine
off immediately and call an authorized dealer for
service.
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128GETTING TO KNOW YOUR INSTRUMENT PANEL
What to do when an electrical load reduction
action message is present (“Battery Saver On” or
“Battery Saver Mode”)
During a trip:
Reduce power to unnecessary loads if possible:
Turn off redundant lights (interior or exte -
rior)
Check what may be plugged in to power
outlets +12 Volt, 115 Volts AC, USB ports
Check HVAC settings (blower, temperature)
Check the audio settings (volume)
After a trip:
Check if any aftermarket equipment was
installed (additional lights, upfitter electrical
accessories, audio systems, alarms) and review
specifications if any (load and ignition off draw
currents).
Evaluate the latest driving cycles (distance,
driving time and parking time).
The vehicle should have service performed if
the message is still present during consecutive
trips and the evaluation of the vehicle and
driving pattern did not help to identify the cause.
DIESEL DISPLAYS
When the appropriate conditions exist, the
following messages display in the instrument
cluster display:
Exhaust Filter Nearing Full Safely Drive at
Consistent Speeds to Clear
Exhaust Filter Full – Power Reduced See Dealer
Exhaust System Service Required – See Dealer
Exhaust System – Filter XX% Full Service
Required See Dealer
Exhaust System Regeneration in Process
Continue Driving
Exhaust System – Regeneration Completed
DIESEL PARTICULATE FILTER (DPF)
M
ESSAGES
This engine meets all required diesel engine
emissions standards. To achieve these emissions
standards, your vehicle is equipped with a
state-of-the-art engine and exhaust system. These
systems are seamlessly integrated into your
vehicle and managed by the Powertrain Control
Module (PCM). The PCM manages engine combustion to allow the exhaust system’s catalyst
to trap and burn Particulate Matter (PM)
pollutants, with no input or interaction on your part.
WARNING!
A malfunctioning catalytic converter, as
previously referenced, can reach higher
temperatures than in normal operating
conditions. This can cause a fire if you drive
slowly or park over flammable substances such
as dry plants, wood, cardboard, etc. This could
result in death or serious injury to the driver,
occupants or others.
CAUTION!
The engine may be switched off even if the
warning light is on: repeated interruptions of the
regeneration process could cause an early
deterioration of engine oil. For this reason it is
always advisable to wait for the symbol to go off
before turning off the engine, following the
previously mentioned instructions. Do not
complete the DPF regeneration process when
the vehicle is stopped.

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GETTING TO KNOW YOUR INSTRUMENT PANEL129
Your vehicle has the ability to alert you to
additional maintenance required on your vehicle or
engine. Refer to the following messages that may
be displayed on your instrument cluster display:
Exhaust Filter Nearing Full Safely Drive at
Consistent Speeds to Clear — This message will
be displayed if the exhaust particulate filter
reaches 80% of its maximum storage capacity.
Under conditions of exclusive short duration
and low speed driving cycles, your diesel engine
and exhaust after-treatment system may never
reach the conditions required to cleanse the
filter to remove the trapped PM. If this occurs,
the “Exhaust Filter XX% Full Safely Drive at
Highway Speeds to Remedy” message will be
displayed. If this message is displayed, you will
hear one chime to assist in alerting you of this
condition. By simply driving your vehicle at
highway speeds for up to 20 minutes, you can
remedy the condition in the particulate filter
system and allow your diesel engine and
exhaust after-treatment system to cleanse the
filter to remove the trapped PM and restore the
system to normal operating condition.
Exhaust System Regeneration in Process
Continue Driving — This message indicates that
the DPF is self-cleaning. Maintain your current
driving condition until regeneration is
completed.
Exhaust System — Regeneration Completed —
This message indicates that the DPF
self-cleaning is completed. If this message is
displayed, you will hear one chime to assist in
alerting you of this condition.
Exhaust System Service Required —
See Dealer — This message indicates regenera -
tion has been disabled due to a system malfunc -
tion. At this point the engine Powertrain Control
Module (PCM) will register a fault code, the
instrument panel will display a Malfunction Indi -
cator Light (MIL) light.
Exhaust Filter Full — Power Reduced
See Dealer — This message indicates the PCM
has derated the engine to limit the likelihood of
permanent damage to the after-treatment
system. If this condition is not corrected and a
dealer service is not performed, extensive
exhaust after-treatment damage can occur. To
correct this condition it will be necessary to have
your vehicle serviced by an authorized dealer.
NOTE:Failing to follow the oil change indicator, changing
your oil and resetting the oil change indicator by
0 miles (0 kilometers) remaining will prevent the
diesel exhaust filter from performing its cleaning
routine. This will shortly result in a Malfunction
Indicator Light (MIL) and reduced engine power.
Only an authorized dealer will be able to correct
this condition.
CAUTION!
See an authorized dealer, as damage to the
exhaust system could occur soon with continued
operation.CAUTION!
See an authorized dealer, as damage to the
exhaust system could occur soon with continued
operation.
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GETTING TO KNOW YOUR INSTRUMENT PANEL131
Diesel Emissions Additive AdBlue® (UREA) Fault Warning Messages:
Engine Will Not Restart Service AdBlue® System See Dealer This message will display if the AdBlue® (UREA) system issue detected is not serviced during
the allowed period. Your engine will not restart unless your vehicle is serviced by an
authorized dealer. If the level is not resolved, an additional warning appears whenever a
certain threshold is reached until it will no longer be possible to start the engine. When
125 miles (200 km) are remaining before the AdBlue® tank is empty, a message will appear
on the instrument panel, accompanied by a buzzer sound.
Engine Will Not Start Service AdBlue® System See Dealer
NOTE:
The display may take up to five seconds to update after adding 2 gallons (7.5 Liters) or
more of AdBlue® (UREA) to the AdBlue® (UREA) tank. If you have a fault related to the
AdBlue® (UREA) system, the display may not update to the new level. See an authorized
dealer for service.
AdBlue® freezes at temperatures lower than 12°F (-11°C). If the car stands for a long time
at this temperature, refilling could be difficult. For this reason, it is advised to park the
vehicle in a garage and/or heated environment, and wait for the AdBlue® (UREA) to return
to liquid state before topping up.
Gasoline Particulate Filter (GPF) System Messages — If Equipped:
Exhaust System Service Required The engine control unit has detected an issue with the gasoline particulate filter system. See
an authorized dealer.
Exhaust System Regeneration in Process Continue Driving The regeneration procedure is controlled automatically by the engine control unit according
to the filter conditions and car use conditions. The following may occur during regeneration:
increased levels of Noise Vibration and Harshness (NVH) and reduced engine performance.
The driver should continue driving normally. This message will continue to appear until
regeneration is complete.
Exhaust System Regeneration Complete The exhaust gas filter regeneration has been completed. This message will briefly appear.
MESSAGE DESCRIPTION
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132GETTING TO KNOW YOUR INSTRUMENT PANEL
WARNING LIGHTS AND MESSAGES
The warning/indicator lights will illuminate in the
instrument panel together with a dedicated
message and/or acoustic signal when applicable.
These indications are indicative and precautionary
and as such must not be considered as exhaustive
and/or alternative to the information contained in
the Owner’s Manual, which you are advised to read
carefully in all cases. Always refer to the
information in this chapter in the event of a failure
indication. All active telltales will display first if
applicable. The system check menu may appear
different based upon equipment options and
current vehicle status. Some telltales are optional
and may not appear.
RED WARNING LIGHTS
Air Bag Warning Light
This warning light will illuminate to
indicate a fault with the air bag, and will
turn on for four to eight seconds as a bulb
check when the ignition is placed in the
ON/RUN or ACC/ON/RUN position. This light will
illuminate with a single chime when a fault with the
air bag has been detected, it will stay on until the
fault is cleared. If the light is not on during startup,
stay on, or turns on while driving, have the system
inspected at an authorized dealer as soon as
possible.
Brake Warning Light
This warning light monitors various brake
functions, including brake fluid level and
parking brake application. If the brake
light turns on it may indicate that the
parking brake is applied, that the brake fluid level
is low, or that there is a problem with the Anti-Lock
Brake System reservoir.
If the light remains on when the parking brake has
been disengaged, and the fluid level is at the full
mark on the master cylinder reservoir, it indicates
a possible brake hydraulic system malfunction or
that a problem with the Brake Booster has been
detected by the Anti-Lock Brake System (ABS) /
Electronic Stability Control (ESC) system. In this
case, the light will remain on until the condition has
been corrected. If the problem is related to the
brake booster, the ABS pump will run when
applying the brake, and a brake pedal pulsation
may be felt during each stop.
The dual brake system provides a reserve braking
capacity in the event of a failure to a portion of the
hydraulic system. A leak in either half of the dual
brake system is indicated by the Brake Warning
Light, which will turn on when the brake fluid level
in the master cylinder has dropped below a
specified level.
The light will remain on until the cause is corrected.
NOTE:The light may flash momentarily during sharp
cornering maneuvers, which change fluid level
conditions. The vehicle should have service
performed, and the brake fluid level checked.
If brake failure is indicated, immediate repair is
necessary.
Vehicles equipped with the Anti-Lock Brake System
(ABS) are also equipped with Electronic Brake
Force Distribution (EBD). In the event of an EBD
failure, the Brake Warning Light will turn on along
with the ABS Light. Immediate repair to the ABS
system is required.
Operation of the Brake Warning Light can be
checked by turning the ignition switch from the OFF
position to the ON/RUN position. The light should
illuminate for approximately two seconds. The light
should then turn off unless the parking brake is
applied or a brake fault is detected. If the light does
not illuminate, have the light inspected by an
authorized dealer.
WARNING!
Driving a vehicle with the red brake light on is
dangerous. Part of the brake system may have
failed. It will take longer to stop the vehicle. You
could have a collision. Have the vehicle checked
immediately.

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GETTING TO KNOW YOUR INSTRUMENT PANEL133
The light also will turn on when the parking brake
is applied with the ignition switch in the ON/RUN
position.
NOTE:This light shows only that the parking brake is
applied. It does not show the degree of brake appli -
cation.
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.
Door Open Warning Light
This indicator will illuminate when a door
is ajar/open and not fully closed.
NOTE:If the vehicle is moving, there will also be a single
chime.
Electric Power Steering (EPS) Fault
Warning Light
This warning light will turn on when
there's a fault with the EPS system
Ú page 168.
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.
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 347.
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.
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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GETTING TO KNOW YOUR INSTRUMENT PANEL135
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.
YELLOW WARNING LIGHTS
Anti-Lock Brake System (ABS) Warning
Light
This warning light monitors the ABS. The
light will turn on when the ignition is
placed in the ON/RUN or ACC/ON/RUN
position and may stay on for as long as
four seconds.
If the ABS light remains on or turns on while
driving, then the Anti-Lock portion of the brake
system is not functioning and service is required as
soon as possible. However, the conventional brake
system will continue to operate normally,
assuming the Brake Warning Light is not also on.
If the ABS light does not turn on when the ignition
is placed in the ON/RUN or ACC/ON/RUN position,
have the brake system inspected by an authorized
dealer.
Electronic Stability Control (ESC) Active
Warning Light — If Equipped
This warning light will indicate when the
Electronic Stability Control system is
Active. The ESC Indicator Light in the
instrument cluster will come on when the
ignition is placed in the ON/RUN or ACC/ON/RUN
position, and when ESC is activated. It should go
out with the engine running. If the ESC Indicator
Light comes on continuously with the engine
running, a malfunction has been detected in the
ESC system. If this warning light remains on after
several ignition cycles, and the vehicle has been
driven several miles (kilometers) at speeds greater
than 30 mph (48 km/h), see an authorized dealer
as soon as possible to have the problem
diagnosed and corrected.
The ESC OFF Indicator Light and the ESC Indi -
cator Light come on momentarily each time the
ignition is placed in the ON/RUN or ACC/ON/
RUN position.
The ESC system will make buzzing or clicking
sounds when it is active. This is normal; the
sounds will stop when ESC becomes inactive.
This light will come on when the vehicle is in an
ESC event.
WARNING!

If you continue operating the vehicle when the
Transmission Temperature Warning Light is illumi -
nated you could cause the fluid to boil over, come
in contact with hot engine or exhaust components
and cause a fire. If you continue to operate the
vehicle when the CLUTCH HOT message is dis -
played or Transmission Temperature Warning
Light is illuminated, you could cause the clutch to
overheat and cause a fire.

CAUTION!
Continuous driving with the Transmission Tem -
perature Warning Light illuminated will eventu -
ally cause severe transmission damage or
transmission failure. If you continue to operate
the vehicle when the CLUTCH HOT message is
displayed or Transmission Temperature Warning
Light is illuminated, you could cause the clutch
to overheat and cause severe clutch damage,
transmission damage or failure.
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136GETTING TO KNOW YOUR INSTRUMENT PANEL
Electronic Stability Control (ESC) OFF
Warning Light — If Equipped
This warning light indicates the Electronic
Stability Control (ESC) is off.
Each time the ignition is turned to ON/RUN or ACC/
ON/RUN, the ESC system will be on, even if it was
turned off previously.
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.
Low Fuel Warning Light
When the fuel level reaches
approximately 2.0 gal (7.5 L), this light
will turn on and a chime will sound. The
light will remain on until fuel is added.
Low Washer Fluid Warning Light —
If Equipped
This warning light will illuminate when the
windshield washer fluid is low
Ú page 364.
Engine Check/Malfunction Indicator
Warning Light (MIL)
The Engine Check/Malfunction Indicator
Light (MIL) is a part of an Onboard
Diagnostic System called OBD II that
monitors engine and automatic
transmission control systems. This warning light
will illuminate when the ignition is in the ON/RUN
position before engine start. If the bulb does not
come on when turning the ignition switch from OFF
to ON/RUN, have the condition checked promptly.
Certain conditions, such as a loose or missing gas
cap, poor quality fuel, etc., may illuminate the light
after engine start. The vehicle should be serviced if
the light stays on through several typical driving
styles. In most situations, the vehicle will drive
normally and will not require towing.
When the engine is running, the MIL may flash to
alert serious conditions that could lead to
immediate loss of power or severe catalytic
converter damage. The vehicle should be serviced
by an authorized dealer as soon as possible if this
occurs.
Service 4WD Warning Light — If Equipped
This warning light will illuminate to signal
a fault with the 4WD system. If the light
stays on or comes on during driving, it
means that the 4WD system is not
functioning properly and that service is required. It
is recommend you drive to the nearest service
center and have the vehicle serviced immediately.
WARNING!
A malfunctioning catalytic converter, as
previously referenced, can reach higher
temperatures than in normal operating
conditions. This can cause a fire if you drive
slowly or park over flammable substances such
as dry plants, wood, cardboard, etc. This could
result in death or serious injury to the driver,
occupants or others.
CAUTION!
Prolonged driving with the Malfunction Indicator
Light (MIL) on could cause damage to the
vehicle control system. It also could affect fuel
economy and driveability. If the MIL is flashing,
severe catalytic converter damage and power
loss will soon occur. Immediate service is
required.

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