check engine light JEEP WAGONEER 2023 Owner's Manual

SERVICING AND MAINTENANCE317
NOTE:
After adding oil to the engine, always reinstall the oil
cap securely by rotating clockwise until it stops. Never
run the engine without the oil fill cap as this could
cause an oil leak.
 Because the oil level is automatically detected only
when the engine has been off and restarted (after four
minutes), the system cannot immediately detect a
sudden drop in oil level while driving (for example, if the
oil pan starts to leak due to damage during an off-road
event).
CHECKING OIL LEVEL — 5.7L & 6.4L
E
NGINES
To ensure proper engine lubrication, the engine oil must
be maintained at the correct level. Check the oil level at
regular intervals, such as every fuel stop. The best time to
check the engine oil level is about five minutes after a fully
warmed up engine is shut off.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings.
There are four possible dipstick types:
 Crosshatched zone.
 Crosshatched zone marked SAFE.
 Crosshatched zone marked with MIN at the low end of
the range and MAX at the high end of the range.
 Crosshatched zone marked with dimples at the MIN
and the MAX ends of the range.
NOTE:Always maintain the oil level within the crosshatch
markings on the dipstick.
Adding 1 qt (1 L) of oil when the reading is at the low end
of the dipstick range will raise the oil level to the high end
of the range marking.
ADDING WASHER FLUID
The instrument cluster display will indicate when the
washer fluid level is low. When the sensor detects a low
fluid level, the Low Washer Fluid Warning Light will turn on
and the "Washer Fluid Low" message will be displayed.
The fluid reservoir for the windshield washers and the rear
window washer is shared. The fluid reservoir is located in
the engine compartment, be sure to check the fluid level
at regular intervals. Fill the reservoir with windshield
washer solvent only (not radiator antifreeze). When
refilling the washer fluid reservoir, take some washer fluid
and apply it to a cloth or towel and wipe clean the wiper
blades, this will help blade performance. To prevent
freeze-up of your windshield washer system in cold
weather, select a solution or mixture that meets or
exceeds the temperature range of your climate. This rating
information can be found on most washer fluid containers.
NOTE:Use care when filling under hood fluids such as engine oil,
washer fluid, antifreeze, etc. to minimize spillage onto top
of engine. Any excess fluid that is spilled onto the top of
the engine should be removed using compressed air or an
absorbent cloth.
CAUTION!
If the “Critically Low or Critically High” Oil Level Warning
Light is illuminated, the following steps should be
taken:
Critically Low: add two quarts of manufacturer speci -
fied oil as soon as possible
Úpage 376. Continuing
to operate the vehicle with “Critically Low” oil level
may damage the engine.
 Critically High: contact an authorized dealer for
service. Continuing to operate the vehicle with “Criti -
cally High” oil level may damage the engine.
Do not use any oils that are not manufacturer specified
and API approved.
Used engine oil and oil filters contain substances which
are harmful to the environment. When oil and filters are
changed contact an authorized dealer and dispose of in
a safe and responsible manner.
WARNING!
Commercially available windshield washer solvents are
flammable. They could ignite and burn you. Care must
be exercised when filling or working around the washer
solution.
8

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328SERVICING AND MAINTENANCE
(Continued)
Coolant Level
The coolant bottle provides a quick visual method for
determining that the coolant level is adequate. With the
engine off and cold, the level of the engine coolant
(antifreeze) in the bottle should be between the ranges
indicated on the bottle.
The radiator normally remains completely full, so there is
no need to remove the radiator/coolant pressure cap
unless checking for engine coolant freeze point or
replacing coolant. Advise your service attendant of this. As
long as the engine operating temperature is satisfactory,
the coolant bottle need only be checked once a month.
When additional engine coolant is needed to maintain the
proper level, only OAT coolant that meets the
requirements of the manufacturer Material Standard
MS.90032 should be added to the coolant bottle. Do not
overfill.
Cooling System Notes
NOTE:When the vehicle is stopped after a few miles/kilometers
of operation, you may observe vapor coming from the front
of the engine compartment. This is normally a result of
moisture from rain, snow, or high humidity accumulating
on the radiator and being vaporized when the thermostat
opens, allowing hot engine coolant (antifreeze) to enter
the radiator. If an examination of your engine compartment shows no
evidence of radiator or hose leaks, the vehicle may be
safely driven. The vapor will soon dissipate.

Do not overfill the coolant expansion bottle.
 Check the coolant freeze point in the radiator and in
the coolant expansion bottle. If engine coolant needs
to be added, the contents of the coolant expansion
bottle must also be protected against freezing.
 If frequent engine coolant additions are required, the
cooling system should be pressure tested for leaks.
 Maintain engine coolant concentration at a minimum
of 50% OAT coolant (conforming to MS.90032) and
distilled water for proper corrosion protection of your
engine which contains aluminum components.
 Make sure that the coolant expansion bottle overflow
hoses are not kinked or obstructed.
 Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean.
 Do not change the thermostat for Summer or Winter
operation. If replacement is ever necessary, install
ONLY the correct type thermostat. Other designs may
result in unsatisfactory engine cooling performance,
poor gas mileage, and increased emissions.
BRAKE SYSTEM
In order to ensure brake system performance, all brake
system components should be inspected periodically. For
the proper maintenance intervals
Úpage 310.
Fluid Level Check — Brake Master Cylinder
The fluid level of the master cylinder should be checked
whenever the vehicle is serviced, or immediately if the
Brake System Warning Light is on. If necessary, add fluid
to bring level within the designated marks on the side of
the reservoir of the brake master cylinder. Be sure to clean
the top of the master cylinder area before removing cap.
With disc brakes, fluid level can be expected to fall as the
brake pads wear. Brake fluid level should be checked
when pads are replaced. If the brake fluid is abnormally
low, check the system for leaks.
WARNING!
Riding the brakes can lead to brake failure and possibly
a collision. Driving with your foot resting or riding on the
brake pedal can result in abnormally high brake
temperatures, excessive lining wear, and possible brake
damage. You would not have your full braking capacity
in an emergency.
WARNING!
Use only manufacturer's recommended brake fluid Úpage 377. Using the wrong type of brake fluid can
severely damage your brake system and/or impair its
performance. The proper type of brake fluid for your
vehicle is also identified on the original factory
installed hydraulic master cylinder reservoir.

23_WS_OM_EN_USC_t.book Page 328

372TECHNICAL SPECIFICATIONS
Tighten the lug nuts/bolts in a star pattern until each nut/
bolt has been tightened twice. Ensure that the socket is
fully engaged on the lug nut/bolt (do not insert it half way).
NOTE:If in doubt about the correct tightness, have them checked
with a torque wrench by an authorized dealer or service
station.
After 25 miles (40 km), check the lug nut/bolt torque to be
sure that all the lug nuts/bolts are properly tightened.

Torque Patterns

FUEL REQUIREMENTS
While operating on gasoline with the required octane
number, hearing a light knocking sound from the engine is
not a cause for concern. However, if the engine is heard
making a heavy knocking sound, see a dealer
immediately. Use of gasoline with an octane number lower
than recommended can cause engine failure and may
void the New Vehicle Limited Warranty.
Poor quality gasoline can cause problems such as hard
starting, stalling, and hesitations. If you experience these
symptoms, try another brand of gasoline before
considering service for the vehicle.
3.0L STANDARD OUTPUT ENGINE
Do not use E-85 flex fuel or ethanol blends greater than
15% in this engine.
This engine is designed to meet all emissions
requirements, and provide satisfactory fuel
economy and performance, when using
high-quality unleaded regular gasoline having
an octane rating of 87, as specified by the
(R+M)/2 method. The use of 91 or higher octane premium
gasoline will allow these engines to operate to optimal
performance. This increase in performance is most
noticeable in hot weather or under heavy load conditions
such as while towing.
3.0L HIGH OUTPUT ENGINE
Do not use E-85 flex fuel or ethanol blends greater than
15% in this engine.
This engine is designed to meet all emission
regulations, provide optimal fuel economy and
performance when using high-quality unleaded
premium gasoline having a posted octane
number of 91 as specified by the (R+M)/2 method. The
use of 91 or higher octane premium gasoline is required
in this engine.
5.7L ENGINE
Do not use E-85 flex fuel or ethanol blends greater than
15% in this engine.
This engine is designed to meet all emission
regulations and provide satisfactory fuel
economy and performance when using
high-quality unleaded gasoline having an
octane range of 87 to 89 as specified by the
(R+M)/2 method. The use of 89 octane plus gasoline is
recommended for optimum performance and fuel
economy.
WARNING!
To avoid the risk of forcing the vehicle off the jack, do
not tighten the lug nuts/bolts fully until the vehicle has
been lowered. Failure to follow this warning may result
in personal injury.

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383
INDEX
AAbout Your Brakes ....................................................... 371
Active Driving Assist System ....................................... 148
Active Lane Management System .............................. 167
Adaptive Cruise Control (ACC)
(Cruise Control) ................................................... 137
, 139
Adding Engine Coolant (Antifreeze) ............................ 327
Adding Fuel................................................................... 177
Additives, Fuel .............................................................. 373
Adjust Down...........................................................................39
Forward ...................................................................... 39
Rearward ....................................................................39
Up................................................................................ 39
Adjustable Pedals ...........................................................49
Air Bag Air Bag Operation.................................................... 266
Air Bag Warning Light .................................... 265
, 267
Driver Knee Air Bag ................................................ 270
Enhanced Accident Response ...................... 273
, 308
Event Data Recorder (EDR).................................... 308 Front Air Bag ........................................................... 267
If Deployment Occurs ............................................. 273
Knee Impact Bolsters ............................................. 270
Maintaining Your Air Bag System .......................... 274
Maintenance ........................................................... 274
Redundant Air Bag Warning Light ......................... 265
Side Air Bags ........................................................... 270
Transporting Pets.................................................... 287 Air Bag Light ........................................................ 265
, 287
Air Cleaner, Engine (Engine Air Cleaner Filter) ...........319
Air Conditioner Maintenance ....................................... 320
Air Conditioner Refrigerant ................................ 320
, 321
Air Conditioner System ................................................. 320
Air Conditioning Rear ............................................................................ 69
Air Conditioning Filter ............................................72
, 320
Air Conditioning System .......................................... 64, 71
Air Conditioning, Operating Tips .................................... 71
Air Filter ......................................................................... 319
Air Pressure Tires.......................................................................... 357
Alarm Arm The System.................................................. 24
, 25
Disarm The System ................................................... 24
Panic........................................................................... 17
Rearm The System .................................................... 25
Security Alarm.......................................................... 111
Alarm System Security Alarm..................................................... 24
, 25
Alterations/Modifications Vehicle........................................................................ 10
Amazon FireTV .................................................... 228
, 232
Amazon FireTV Built-in ................................................. 228
Antifreeze (Engine Coolant) ............................... 326
, 375
Disposal ...................................................................327 Anti-Lock Brake System (ABS) ..................................... 239
Anti-Lock Warning Light ............................................... 111
Apps .............................................................................. 226
Arming System
Security Alarm ........................................................... 24
Assist, Hill Start ............................................................ 244
Audio Systems (Radio) ................................................. 196
Auto Down Power Windows ........................................... 82
Auto Hold ................................................... 115
, 116, 124
Automatic Folding Mirrors ............................................. 52
Automatic Headlights ..................................................... 58
Automatic High Beams .................................................. 58
Automatic Tailgate Release ........................................... 87
Automatic Temperature Control (ATC) .......................... 71 Automatic Transmission ..................................... 119
, 126
Adding Fluid ............................................................. 329
Fluid And Filter Change........................................... 329
Fluid Change ........................................................... 329
Fluid Level Check .................................................... 329
Fluid Type .......................................................329
, 377
Special Additives ..................................................... 329
Automatic Transmission Limp Home Mode ............... 128
AutoPark ....................................................................... 120
AUX Port .......................................................................... 76
Auxiliary Driving Systems ............................................. 247
Auxiliary Electrical Outlet (Power Outlet) ...................... 79
Auxiliary Power Outlet .................................................... 79
Axle Fluid....................................................................... 377
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384 B
Base Instrument Cluster
b
........................................97
Battery ................................................................. 109, 318
Charging System Light............................................ 109
Keyless Key Fob Replacement .................................18
Battery Saver Feature ..................................................... 60
Belts, Seat .................................................................... 287
Body Mechanism Lubrication...................................... 323
B-Pillar Location ........................................................... 354
Brake Assist System .................................................... 241
Brake Control System, Electronic ............................... 241
Brake Fluid .......................................................... 328
, 377
Brake System ...................................................... 328, 371
Anti-Lock (ABS)........................................................ 371 Fluid Check.............................................................. 328
Master Cylinder ....................................................... 328
Parking .................................................................... 122
Warning Light .......................................................... 109
Brake/Transmission Interlock..................................... 126
Bulb Replacement ....................................................... 349
Bulbs, Light................................................................... 289
CCamera, Night Vision ................................................... 172
Camera, Rear ...................................................... 170, 175
Capacities, Fluid ........................................................... 375
Caps, Filler Oil (Engine) .............................................................. 313
Radiator (Coolant Pressure)................................... 327
Car Washes .................................................................. 368
Carbon Monoxide Warning .......................................... 289
Cargo Area Cover .............................................. 89
, 90, 91
Cargo Compartment ....................................................... 89 Light ............................................................................89 Cargo Light ...................................................................... 89
Cargo Net ........................................................................ 91
Cargo Tie-Downs ............................................................. 89
Cellular Phone............................................................... 238
Center Console Cooler.................................................... 75
Center Console Safe ....................................................... 75
Center Console Safe — If Equipped

b
...................... 75
Chains, Tire ...................................................................364
Chart, Tire Sizing ...........................................................350
Check Engine Light (Malfunction Indicator Light) ...... 118
Checking Your Vehicle For Safety ................................ 287
Checks, Safety .............................................................. 287
Child Restraint .............................................................. 275
Child Restraints Booster Seats .......................................................... 277
Child Seat Installation ............................................. 285How To Stow An unused ALR Seat Belt .................283Infant And Child Restraints ..................................... 276
Locating The LATCH Anchorages............................ 281
Lower Anchors And Tethers For Children............... 279
Older Children And Child Restraints....................... 277
Seating Positions ..................................................... 278
Child Safety Locks .......................................................... 30
Clean Air Gasoline ........................................................ 373
Cleaning Wheels .....................................................................362
Climate Control ............................................................... 64 Automatic ................................................................... 64
Cold Weather Operation ............................................... 122
Compact Spare Tire ...................................................... 361
Contract, Service .......................................................... 380
Cooling Pressure Cap (Radiator Cap) ..........................327
Cooling System ............................................................. 326 Adding Coolant (Antifreeze) ....................................327
Coolant Level ...........................................................328 Cooling Capacity...................................................... 375
Disposal Of Used Coolant ....................................... 327
Drain, Flush, And Refill ........................................... 326
Inspection .......................................................326
, 328
Points To Remember .............................................. 328
Pressure Cap ........................................................... 327
Radiator Cap............................................................ 327
Selection Of Coolant (Antifreeze) ........ 326
, 375, 376
Corrosion Protection .................................................... 368
Cruise Control (Speed Control) ........................... 137
, 138
Cruise Light ................................................................... 116
Customer Assistance ................................................... 378
Customer Programmable Features ............................. 197
Cybersecurity ................................................................ 196
DDaytime Running Lights ................................................. 58 Defroster, Windshield .................................................. 288
De-Icer, Remote Start .................................................... 23
Deluxe Security Alarm .................................................... 25
Diagnostic System, Onboard ....................................... 117
Digital Rearview Mirror .................................................. 50
Dipsticks Oil (Engine) ..................................................... 316
, 317
Disabled Vehicle Towing .............................................. 306
Disposal Antifreeze (Engine Coolant) .................................... 327
Door Ajar .............................................................. 109
, 110
Door Ajar Light ..................................................... 109, 110
Door Locks ............................................................... 26, 30
Child-Protection Door Lock — Rear Doors ............... 30
Doors ............................................................................... 26
Driver’s Seat Back Tilt .................................................... 33
Driving ........................................................................... 193

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385
E
Electric Brake Control System..................................... 241 Anti-Lock Brake System ......................................... 239
Electronic Roll Mitigation .............................. 241
, 246
Electric Parking Brake ................................................. 122
Electric Remote Mirrors ..................................................52 Electrical Outlet, Auxiliary (Power Outlet) ...................... 79Electronic Range Select (ERS) .................................... 129
Electronic Speed Control (Cruise Control) .................. 138
Electronic Stability Control (ESC) ................................ 242
Electronic Throttle Control Warning Light................... 110
Emergency Braking ...................................................... 252
Emergency Gas Can Refueling .................................... 302
Emergency, In Case Of Freeing Vehicle When Stuck .................................. 305
Hazard Warning Flasher ......................................... 290
Jacking..................................................................... 293
Jump Starting .......................................................... 300
Emission Control System Maintenance...................... 118
Engine .................................................................. 313
, 315
Air Cleaner ............................................................... 319 Block Heater ........................................................... 122
Break-In Recommendations .................................. 122
Checking Oil Level ......................................... 316
, 317
Compartment ........................................313, 314, 315
Compartment Identification .......................... 313, 314
Cooling..................................................................... 326
Exhaust Gas Caution .............................................. 289
Fails To Start ........................................................... 121
Flooded, Starting .................................................... 121
Fuel Requirements ........................................ 372
, 375
Jump Starting .......................................................... 300
Oil .................................................................... 319
, 375
Oil Filler Cap ............................................................ 313
Oil Filter ................................................................... 319 Oil Selection .......................................... 319
, 375, 376
Oil Synthetic ............................................................. 319
Starting.....................................................................119
Engine Oil Life Reset

b
...........................................101
Enhanced Accident Response Feature ............. 273, 308
Ethanol .......................................................................... 373
Exhaust Gas Cautions ..................................................289
Exhaust System .................................................. 289
, 325
Exterior Lights .............................................. 57, 289, 349
FFamCam System...........................................................171
Filters Air Cleaner ............................................................... 319
Air Conditioning ...................................... 72
, 320, 321
Engine Oil ................................................................. 319
Engine Oil Disposal..................................................319
FireTV.............................................................................232
Flashers ......................................................................... 290 Hazard Warning ....................................................... 290
Turn Signals ................................................... 116
, 289
Flash-To-Pass .................................................................. 58
Flooded Engine Starting ............................................... 121
Fluid Capacities ............................................................375
Fluid Leaks ....................................................................289
Fluid Level Checks Brake ........................................................................ 328
Engine Oil ....................................................... 316
, 317
Fluids And Lubricants ...................................................377
Fold-Flat Seats ................................................................ 33
Forward Collision Warning ...........................................250
Four Wheel Drive ................................................ 129
, 131
Operation ................................................................. 129
System .....................................................................129 Four Wheel Drive Operation ........................................ 129
Four-Way Hazard Flasher ............................................. 290
Freeing A Stuck Vehicle ............................................... 305
Front Axle (Differential) ................................................ 330
Fuel................................................................................ 372 Additives .................................................................. 373
Clean Air .................................................................. 373
Ethanol..................................................................... 373Gasoline ................................................................... 372
Materials Added ...................................................... 373
Methanol ................................................................. 373
Octane Rating.......................................................... 372
Requirements .................................................372
, 375
Specifications .......................................................... 376
Tank Capacity .......................................................... 375
Fueling .......................................................................... 177
Fully Automated ParkSense Active Park Assist .......... 162
Fuses ............................................................................. 331
GGarage Door Opener (HomeLink) .................................. 53 Gasoline, (Fuel) ............................................................ 372
Gasoline, Clean Air ....................................................... 373
Gasoline, Reformulated ............................................... 373
Gear Ranges ................................................................. 127
Glass Cleaning .............................................................. 370
Glove Compartment Storage ......................................... 73Gross Axle Weight Rating ............................................. 179
Gross Vehicle Weight Rating ....................................... 179
GVWR ............................................................................ 178
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387
Fog .............................................................................. 60
Hazard Warning Flasher ......................................... 290
Headlights On With Wipers .......................................59
High Beam/Low Beam Select ...................................58
Hill Descent Control Indicator ................................ 243
Illuminated Entry........................................................62
Interior ........................................................................60
Lights On Reminder ...................................................59
Malfunction Indicator (Check Engine) ................... 112
Multicolor Ambient ....................................................62
Park .................................................................. 59
, 116
Passing ....................................................................... 58
Reading ...................................................................... 61
Seat Belt Reminder ................................................ 111
Security Alarm ......................................................... 111 Service ..................................................................... 349
Traction Control ...................................................... 243
Turn Signals ..................................... 57
, 60, 116, 289
Vanity Mirror............................................................... 50
Warning Instrument Cluster Descriptions ............. 110
Load Shed Battery Saver Mode .................................. 107
Load Shed Battery Saver On ....................................... 107
Load Shed Electrical Load Reduction......................... 107
Load Shed Intelligent Battery Sensor ......................... 107
Loading Vehicle ............................................................ 178 Tires ......................................................................... 354
Locks Child Protection .........................................................30
Manual ....................................................................... 26
Power Door .................................................................27
Lubrication, Body ......................................................... 323
Lug Nuts/Bolts ............................................................. 371
MMaintenance ................................................................... 85 Maintenance Free Battery ...........................................318
Maintenance Schedule ................................................ 309
Malfunction Indicator Light (Check Engine) ...... 112
, 118
Manual Park Release............................................................303Service .....................................................................381
McIntosh ....................................................................... 226
Media Hub....................................................................... 76
Memory Feature (Memory Seats) .................................. 31
Memory Seat ................................................................... 31 Memory Seats And Radio............................................... 31
Methanol ....................................................................... 373
Mirrors ............................................................................. 50 Conversation .............................................................. 51
Electric Remote ......................................................... 52
Exterior Folding.......................................................... 51
Heated........................................................................ 53
Outside ....................................................................... 51
Rearview ...........................................................50
, 290
Tilt In Reverse ............................................................ 53
Vanity.......................................................................... 50
Modifications/Alterations Vehicle........................................................................ 10
Monitor, Tire Pressure System..................................... 252
Mopar Parts .................................................................. 381
MP3 Control .................................................................... 76 Multi-Function Control Lever .......................................... 57
NNew Vehicle Break-In Period ....................................... 122
Night Vision Camera..................................................... 172
OOccupant Restraints .................................................... 256
Octane Rating, Gasoline (Fuel) .................................... 372
Off-Road Pages ............................................................. 236
Oil Change Indicator ..................................................... 101 Reset........................................................................ 101
Oil Filter, Change .......................................................... 319
Oil Filter, Selection ....................................................... 319
Oil Pressure Light ......................................................... 111
Oil, Engine ..................................................................... 319 Capacity ................................................................... 375
Checking .........................................................316
, 317
Dipstick ...........................................................316, 317
Disposal ................................................................... 319
Filter ......................................................................... 319
Filter Disposal.......................................................... 319
Identification Logo .................................................. 319
Materials Added To ................................................. 319 Pressure Warning Light .......................................... 111Recommendation...........................................319
, 375
Synthetic .................................................................. 319
Viscosity ................................................................... 375
Onboard Diagnostic System ........................................ 117
Operating Precautions ................................................. 117
Operator Manual Owner's Manual ...................................................... 381
Outside Rearview Mirrors .............................................. 51
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