2023 JEEP GLADIATOR check engine

STARTING AND OPERATING195
(Continued)
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.
Excessive overfilling of the DEF tank can
result in a MIL lamp/fault code and inaccu-
rate level readings.
Refilling With Nozzles
You can fill up at any DEF distributor.
Proceed as follows:
Insert the DEF nozzle in the filler, start
refilling and stop refilling at the first shut-off
(the shut-off indicates that the DEF tank is
full). Do not proceed with the refilling, to
prevent spillage of DEF.
Extract the nozzle.
Refilling With Containers
Proceed as follows:
Check the expiration date.
Read the advice for use on the label before
pouring the content of the bottle into the
DEF tank.
If systems which cannot be screwed in
(e.g. tanks) are used for refilling, after the
indication appears on the instrument panel
display Úpage 121 fill the DEF tank with no
more than 2 gal (8 L).
If containers which can be screwed to the
filler are used, the reservoir is full when the
DEF level in the container stops pouring out.
Do not proceed further.
3. Stop filling the DEF tank immediately when any of the following happen: DEF stops flowing
from the fill bottle into the DEF fill inlet, DEF
splashes out the fill inlet, or a DEF pump
nozzle automatically shuts off.
4. Reinstall cap onto DEF fill inlet.
VEHICLE LOADING
CERTIFICATION LABEL
As required by National Highway Traffic Safety
Administration regulations, your vehicle has a
certification label affixed to the driver's side door or
pillar.
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 immedi -
ately with water and use an absorbent mate -
rial 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.
Never add anything other than DEF to the tank
– especially any form of hydrocarbon such as
diesel fuel, fuel system additives, gasoline, or
any other petroleum-based product. Even a
very small amount of these, less than
100 parts per million or less than 1 oz. per
78 gal (295 L) will contaminate the entire DEF
system and will require replacement. If
owners use a container, funnel or nozzle when
refilling the tank, it should either be new or
one that is has only been used for adding DEF.
Mopar® provides an attachable nozzle with its
DEF for this purpose.
CAUTION!
4

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STARTING AND OPERATING207
Shifting Out of N (Neutral)
Use the following procedure to prepare your
vehicle for normal usage.

1. Bring the vehicle to a complete stop, leaving
it connected to the tow vehicle.

2. Firmly apply the parking brake.
3. Start the engine.
4. Press and hold the brake pedal.
5. Shift the transmission into NEUTRAL.
6. Turn the engine off.
7. Shift the transfer case lever to the desired position.
NOTE:When shifting the transfer case out of N (Neutral),
the engine should remain off to avoid gear clash.
8. Shift the automatic transmission into PARK, or place manual transmission in NEUTRAL.
9. Release the brake pedal.
10. Disconnect vehicle from the tow vehicle.
11. Start the engine.
12. Press and hold the brake pedal.
13. Release the parking brake.
14. Shift the transmission into gear, release the brake pedal (and clutch pedal on manual
transmissions), and check that the vehicle
operates normally.
DRIVING TIPS
ON-ROAD DRIVING TIPS
Utility vehicles have higher ground clearance and a
narrower track to make them capable of
performing in a wide variety of off-road
applications. Specific design characteristics give
them a higher center of gravity than conventional
passenger cars.
An advantage of the higher ground clearance is a
better view of the road, allowing you to anticipate
problems. They are not designed for cornering at
the same speeds as conventional passenger cars
any more than low-slung sports cars are designed
to perform satisfactorily in off-road conditions.
Avoid sharp turns or abrupt maneuvers. As with
other vehicles of this type, failure to operate this
vehicle correctly may result in loss of control or
vehicle rollover.
OFF-ROAD DRIVING TIPS
Side Step Removal — If Equipped
NOTE:Prior to off-road usage, the side steps should be
removed to prevent damage.

1. There are two nuts connecting to the body side and one bolt connecting to the
underbody on each attachment bracket. There are four attachment brackets on each
side step.

Fastener Locations (One Side)

2. Remove two nuts and one bolt from the underside of the vehicle for each of the four
brackets. Repeat for other side of vehicle.

Underside Nuts

4

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212STARTING AND OPERATING
IF YOU STALL OR BEGIN TO LOSE HEADWAY
If you stall or begin to lose headway while climbing
a steep hill, allow your vehicle to come to a stop
and immediately apply the brake. Restart the
engine and shift into REVERSE. Back slowly down
the hill allowing engine braking to control the
descent and apply your brakes, if necessary, but
do not allow the tires to lock.
Driving Through Water
Extreme care should be taken crossing any type of
water. Water crossings should be avoided, if
possible, and only be attempted when necessary in
a safe, responsible manner. You should only drive
through areas which are designated and approved.
You should tread lightly and avoid damage to the
environment. You should know your vehicle's
abilities and be able to recover it if something goes wrong. You should never stop or shut a vehicle off
when crossing deep water unless you ingested
water into the engine air intake. If the engine stalls,
do not attempt to restart it. Determine if it has
ingested water first. The key to any crossing is low
and slow. Shift into FIRST gear (manual
transmission), or DRIVE (automatic transmission),
with the transfer case in the 4L position and
proceed very slowly with a constant slow speed
(3 to 5 mph {5 to 8 km/h} maximum) and light
throttle. Keep the vehicle moving; do not try to
accelerate through the crossing. After crossing any
water higher than the bottom of the axle
differentials, you should inspect all of the vehicle
fluids for signs of water ingestion.
BEFORE YOU CROSS ANY TYPE OF WATER
As you approach any type of water, you need to
determine if you can cross it safely and
responsibly. If necessary, get out and walk through
the water or probe it with a stick. You need to be
sure of its depth, approach angle, current and
bottom condition. Be careful of murky or muddy
waters; check for hidden obstacles. Make sure you
will not be intruding on any wildlife, and you can
recover the vehicle if necessary. The key to a safe
crossing is the water depth, current and bottom
conditions. On soft bottoms, the vehicle will sink in,
effectively increasing the water level on the
vehicle. Be sure to consider this when determining
the depth and the ability to safely cross.
CROSSING PUDDLES, POOLS, FLOODED
AREAS OR OTHER STANDING WATER
Puddles, pools, flooded or other standing water
areas normally contain murky or muddy waters.
These water types normally contain hidden
obstacles and make it difficult to determine an
accurate water depth, approach angle, and bottom
condition. Murky or muddy water holes are where
you want to hook up tow straps prior to entering.
This makes for a faster, cleaner and easier vehicle
recovery. If you are able to determine you can
safely cross, than proceed using the low and slow
method.
WARNING!
If the engine stalls or you lose headway or
cannot make it to the top of a steep hill or grade,
never attempt to turn around. To do so may
result in tipping and rolling the vehicle, which
may result in severe injury. Always back carefully
straight down a hill in REVERSE. Never back
down a hill in NEUTRAL using only the vehicle
brakes. Never drive diagonally across a hill,
always drive straight up or down.
CAUTION!
Water ingestion into the axles, transmission,
transfer case, engine or vehicle interior can
occur if you drive too fast or through too deep
of water. Water can cause permanent damage
to engine, driveline or other vehicle compo -
nents, and your brakes will be less effective
once wet and/or muddy.
When driving through water, do not exceed
5 mph (8 km/h). Always check water depth
before entering as a precaution, and check all
fluids afterward. Driving through water may
cause damage that may not be covered by the
New Vehicle Limited Warranty.

23_JT_OM_EN_USC_t.book Page 212

266MULTIMEDIA
The doors, hood, and trunk/liftgate are closed.
The vehicle’s check engine light must be off.
The vehicle must have at least a quarter tank of
fuel, along with oil and battery power.
The vehicle’s hazard lights must be off.
If equipped, the vehicle must have an automatic
transmission.
The vehicle must be in an open area with cell
tower reception.
Your mobile device must have a cellular or Wi-Fi
connection.
If the Panic button has been pressed, the
vehicle must be started at least once after
alarming the system.
NOTE:
The SiriusXM Guardian™ Customer Care agents are
not authorized for Remote Vehicle Start services.
Contact the Uconnect Care Team for assistance.

Remote Horn & Lights
Description
It is easy to locate a vehicle in a dark, crowded or
noisy parking area by activating the horn and
lights. It may also help if you need to draw attention
to your vehicle for any reason.
If you want, you can set up push notifications every
time a command is sent to turn on the horn and
lights. Working Vehicle Conditions
The vehicle must in PARK or at a standstill.
The vehicle must be in an open area with cell
tower reception.
Your mobile device must have a cellular or Wi-Fi
connection.
NOTE:The Remote Horn & Lights feature is designed to
be loud and get noticed. Please keep in mind the
surroundings when using this feature. You are
responsible for compliance with local laws, rules
and ordinances in the location of your vehicle
when using Remote Horn & Lights.
Assist — If Equipped
Description
Vehicles equipped with the SiriusXM Guardian™
connected services feature may contain an ASSIST
button in the vehicle. Once your SiriusXM
Guardian™ connected services have been
activated, the ASSIST button can connect you
directly to the Customer Care call center (if
equipped). You will be directed to one of the
following four services:
Roadside Assistance
— If you get a flat tire or
need a tow, you’ll be connected to someone
who can help anytime.
Connected Services — Contact the SiriusXM
Guardian™ Customer Care call center to acti -vate your services, renew after your trial has
expired, for in-vehicle support for your SiriusXM
Guardian™ connected services, or help
answering any general questions surrounding
your connected services.
Uconnect Care — In-vehicle support for all
non-connected Uconnect system features, such
as radio and Bluetooth® connections.
Vehicle Care
— Total support for your vehicle.
SiriusXM Guardian™ In-Vehicle Assistance
Features — If Equipped
With SiriusXM Guardian™, your vehicle has
onboard assistance features located on the
rearview mirror or overhead console designed to
enhance your driving experience if you should ever
need assistance or support.
How It Works
Simply push the ASSIST button in the vehicle and
you will be presented with your ASSIST options on
the touchscreen. Make your selection by pressing
the touchscreen.
Requirements
This feature is available only on vehicles sold in
the US and Canada.
Vehicle must be properly equipped with the
SiriusXM Guardian™ connected services.
Vehicle must have an operable LTE (voice/data)
or 4G (data) network connection.

23_JT_OM_EN_USC_t.book Page 266

SAFETY307
(Continued)
The Air Bag Warning Light does not come on
during the four to eight seconds when the igni -
tion switch is first in the ON/RUN position.
The Air Bag Warning Light remains on after the
four to eight-second interval.
The Air Bag Warning Light comes on intermit -
tently or remains on while driving.
NOTE:If the speedometer, tachometer, or any engine
related gauges are not working, the Occupant
Restraint Controller (ORC) may also be disabled. In
this condition the air bags may not be ready to
inflate for your protection. Have an authorized
dealer service the air bag system immediately.
Redundant Air Bag Warning Light
If a fault with the Air Bag Warning Light is
detected, which could affect the
Supplemental Restraint System (SRS),
the Redundant Air Bag Warning Light will
illuminate on the instrument panel. The
Redundant Air Bag Warning Light will stay on until
the fault is cleared. In addition, a single chime will
sound to alert you that the Redundant Air Bag
Warning Light has come on and a fault has been
detected. If the Redundant Air Bag Warning Light
comes on intermittently or remains on while driving
have an authorized dealer service the vehicle
immediately.
See Ú page 132 for more information regarding
the Redundant Air Bag Warning Light.
Front Air Bags
This vehicle has front air bags and lap/shoulder
belts for both the driver and front passenger. The
front air bags are a supplement to the seat belt
restraint systems. The driver front air bag is
mounted in the center of the steering wheel. The
passenger front air bag is mounted in the
instrument panel, above the glove compartment.
The words “SRS AIRBAG” or “AIRBAG” are
embossed on the air bag covers.
Front Air Bag/Knee Impact Bolster Locations

WARNING!
Ignoring the Air Bag Warning Light in your
instrument panel could mean you won’t have the
air bag system to protect you in a collision. If the
light does not come on as a bulb check when the
ignition is first turned on, stays on after you start
the vehicle, or if it comes on as you drive, have
an authorized dealer service the air bag system
immediately.
1 — Driver And Passenger Front Air Bags
2 — Driver And Passenger Knee Impact Bolsters
WARNING!
Being too close to the steering wheel or instru
-
ment panel during front air bag deployment
could cause serious injury, including death. Air
bags need room to inflate. Sit back, comfort -
ably extending your arms to reach the steering
wheel or instrument panel.
Never place a rear-facing child restraint in
front of an air bag. A deploying passenger
front air bag can cause death or serious injury
to a child 12 years or younger, including a
child in a rear-facing child restraint.
6

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SAFETY317
(Continued)
Enhanced Accident Response System
In the event of an impact, if the communication
network remains intact, and the power remains
intact, depending on the nature of the event, the
Occupant Restraint Controller (ORC) will determine
whether to have the Enhanced Accident Response
System perform the following functions:
Cut off fuel to the engine (if equipped)
Cut off battery power to the electric motor (if
equipped)
Flash hazard lights as long as the battery has
power
Turn on the interior lights, which remain on as
long as the battery has power or for 15 minutes
from the intervention of the Enhanced Accident
Response System
Unlock the power door locks
Your vehicle may also be designed to perform any
of these other functions in response to the
Enhanced Accident Response System:
Turn off the Fuel Filter Heater, Turn off the HVAC
Blower Motor, Close the HVAC Circulation Door
Cut off battery power to the:
Engine
Electric Motor (if equipped)
Electric power steering
Brake booster
Electric park brake
Automatic transmission gear selector
Horn
Front wiper
NOTE:After an accident, remember to cycle the ignition to
the STOP (OFF/LOCK) position and remove the key
from the ignition switch to avoid draining the
battery. Carefully check the vehicle for fuel leaks in
the engine compartment and on the ground near
the engine compartment and fuel tank before
resetting the system and starting the engine. If
there are no fuel leaks or damage to the vehicle
electrical devices (e.g. headlights) after an
accident, reset the system by following the
procedure described below. If you have any doubt,
contact an authorized dealer.
Enhanced Accident Response System
Reset Procedure
In order to reset the Enhanced Accident Response
System functions after an event, the ignition switch
must be changed from ignition START or ON/RUN
to ignition OFF. Carefully check the vehicle for fuel
leaks in the engine compartment and on the
ground near the engine compartment and fuel
tank before resetting the system and starting the engine. After an accident, if the vehicle will not
start after performing the reset procedure, the
vehicle must be towed to an authorized dealer to
be inspected and to have the Enhanced Accident
Response System reset.
Maintaining Your Air Bag System
WARNING!
Modifications to any part of the air bag system
could cause it to fail when you need it. You
could be injured if the air bag system is not
there to protect you. Do not modify the compo
-
nents or wiring, including adding any kind of
badges or stickers to the steering wheel hub
trim cover or the upper passenger side of the
instrument panel. Do not modify the front
fascia/bumper, vehicle body structure, or add
aftermarket side steps or running boards.
It is dangerous to try to repair any part of the
air bag system yourself. Be sure to tell anyone
who works on your vehicle that it has an air
bag system.
6

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330SAFETY
(Continued)
PERIODIC SAFETY CHECKS YOU SHOULD
M
AKE OUTSIDE THE VEHICLE
Tires
Examine tires for excessive tread wear and uneven
wear patterns. Check for stones, nails, glass, or
other objects lodged in the tread or sidewall.
Inspect the tread for cuts and cracks. Inspect
sidewalls for cuts, cracks, and bulges. Check the
lug nut/bolt torque for tightness. Check the tires
(including spare) for proper cold inflation pressure.
Lights
Have someone observe the operation of brake
lights and exterior lights while you work the
controls. Check turn signal and high beam
indicator lights on the instrument panel.
Door Latches
Check for proper closing, latching, and locking.
Fluid Leaks
Check the area under vehicle after overnight
parking for fuel, coolant, oil, or other fluid leaks.
Also, if gasoline fumes are detected or if fuel or
brake fluid leaks are suspected, the cause should
be located and corrected immediately.
 ALWAYS REMOVE THE EXISTING
FLOOR MAT FROM THE VEHICLE before
installing any other floor mat. NEVER
install or stack an additional floor mat
on top of an existing floor mat.
ONLY install floor mats designed to fit your
vehicle. NEVER install a floor mat that cannot
be properly attached and secured to your
vehicle. If a floor mat needs to be replaced,
only use a FCA approved floor mat for the
specific make, model, and year of your
vehicle.
ONLY use the driver’s side floor mat on the
driver’s side floor area. To check for interfer -
ence, with the vehicle properly parked with the
engine off, fully press the accelerator, the
brake, and the clutch pedal (if present) to
check for interference. If your floor mat inter -
feres with the operation of any pedal, or is not
secure to the floor, remove the floor mat from
the vehicle and place the floor mat in your
trunk.
ONLY use the passenger’s side floor mat on
the passenger’s side floor area.
WARNING!
ALWAYS make sure objects cannot fall or slide
into the driver’s side floor area when the
vehicle is moving. Objects can become
trapped under accelerator, brake, or clutch
pedals and could cause a loss of vehicle
control.
NEVER place any objects under the floor mat
(e.g., towels, keys, etc.). These objects could
change the position of the floor mat and may
cause interference with the accelerator,
brake, or clutch pedals.
If the vehicle carpet has been removed and
re-installed, always properly attach carpet to
the floor and check the floor mat fasteners are
secure to the vehicle carpet. Fully press each
pedal to check for interference with the accel -
erator, brake, or clutch pedals then re-install
the floor mats.
It is recommended to only use mild soap and
water to clean your floor mats. After cleaning,
always check your floor mat has been properly
installed and is secured to your vehicle using
the floor mat fasteners by lightly pulling mat.
WARNING!

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353
SERVICING AND MAINTENANCE
SCHEDULED SERVICING — GASOLINE
ENGINE
Your vehicle is equipped with an automatic oil
change indicator system. The oil change indicator
system will remind you that it is time to take your
vehicle in for scheduled maintenance.
Based on engine operation conditions, the oil
change indicator message will illuminate. This
means that service is required for your vehicle.
Operating conditions such as frequent short-trips,
trailer tow, or extremely hot or cold ambient
temperatures will influence when the “Change Oil”
or “Oil Change Required” message is displayed.
Have your vehicle serviced as soon as possible,
within the next 500 miles (805 km).
On vehicles equipped with an instrument cluster
display, “Oil Change Required” will be displayed
and a single chime will sound, indicating that an oil
change is necessary. On vehicles not equipped with an instrument
cluster display, “Change Oil” will flash in the
instrument cluster odometer and a single chime
will sound, indicating that an oil change is
necessary.
An authorized dealer will reset the oil change
indicator message after completing the scheduled
oil change. To reset the system follow the steps
described Ú
page 122.
NOTE:Under no circumstances should oil change
intervals exceed 10,000 miles (16,000 km),
12 months or 350 hours of engine run time,
whichever comes first. The 350 hours of engine
run or idle time is generally only a concern for fleet
customers. Once A Month Or Before A Long Trip:
Check engine oil level.
Check windshield washer fluid level.
Check the tire pressures and look for unusual
wear or damage, rotate at the first sign of irreg
-
ular wear.
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.
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