check engine JEEP WRANGLER 2010 JK / 3.G Owner's Manual

When additional engine coolant (antifreeze) is needed to
maintain the proper level, it should be added to the
coolant bottle. Do not overfill.
Points to Remember
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 nor-
mally a result of moisture from rain, snow, or high
humidity accumulating on the radiator and being vapor-
ized 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 bottle.
•Check the engine coolant (antifreeze) freeze point in
the radiator and in the coolant recovery bottle. If engine coolant (antifreeze) needs to be added, the
contents of the coolant recovery bottle must also be
protected against freezing.
•If frequent engine coolant (antifreeze) additions are
required, or if the level in the recovery bottle does not
drop when the engine cools, the cooling system should
be pressure-tested for leaks.
•Maintain the engine coolant (antifreeze) concentration
at 50% HOAT engine coolant (antifreeze) (minimum)
and distilled water for proper corrosion protection of
your engine which contains aluminum components.
•Make sure that the radiator and coolant recovery
bottle 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.
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MAINTAINING YOUR VEHICLE 475

To properly check the automatic transmission fluid level,
the following procedure must be used:
1. Operate the engine at idle speed and normal operating
temperature.
2. The vehicle must be on level ground.
3. Fully apply the parking brake.
4. Place the shift lever momentarily into each gear posi-
tion ending with the shift lever in PARK.
5. Remove the dipstick, wipe it clean and reinsert it until
seated.
6. Remove the dipstick again and note the fluid level on
both sides. The fluid level should be between the HOT
(upper) reference holes on the dipstick at normal operat-
ing temperature. Verify that a solid coating of oil is seen
on both sides of the dipstick. If the fluid is low, add as
required into the dipstick tube.Do not overfill.Afteradding any quantity of oil through the dipstick tube, wait
a minimum of two minutes for the oil to fully drain into
the transmission before rechecking the fluid level.
NOTE:
If it is necessary to check the transmission below
the operating temperature, the fluid level should be
between the two cold (lower) holes on the dipstick with
the fluid at approximately 70° F (21° C) (room tempera-
ture). If the fluid level is correctly established at room
temperature, it should be between the HOT (upper)
reference holes when the transmission reaches 180° F (82°
C). Remember it is best to check the level at the normal
operating temperature.
CAUTION!
Be aware that if the fluid temperature is below 50° F
(10° C), it may not register on the dipstick. Do not add
fluid until the temperature is elevated enough to
produce an accurate reading.
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MAINTAINING YOUR VEHICLE 479

7. Check for leaks. Release the parking brake.
NOTE:To prevent dirt and water from entering the
transmission after checking or replenishing fluid, make
certain that the dipstick cap is properly reseated. It is
normal for the dipstick cap to spring back slightly from
its fully seated position, as long as its seal remains
engaged in the dipstick tube.
Special Additives
Automatic Transmission Fluid (ATF) is an engineered
product and its performance may be impaired by supple-
mental additives. Therefore, do not add any fluid addi-
tives to the transmission. The only exception to this
policy is the use of special dyes to aid in detecting fluid
leaks. In addition, avoid using transmission sealers as
they may adversely affect seals.
CAUTION!
Do not use chemical flushes in your transmission as
the chemicals can damage your transmission compo-
nents. Such damage is not covered by the New
Vehicle Limited Warranty.
Hydraulic Clutch Fluid – Manual Transmission
The clutch hydraulic system is a sealed maintenance-free
system. In the event of leakage or other malfunction, the
system must be replaced.
Manual Transmission – If Equipped
Selection of Lubricant
Use only manufacturer’s recommended manual trans-
mission fluid. Refer to “Fluids, Lubricants, and Genuine
Parts” in “Maintaining Your Vehicle” for further
information.
480 MAINTAINING YOUR VEHICLE

•Change your engine oil more often if you drive your
vehicle off-road for an extended period of time.
•Under no circumstances should oil change intervals
exceed 6,000 miles (10 000 km) or six months, which-
ever comes first.
Your dealer will reset the oil change indicator message
after completing the scheduled oil change. If this sched-
uled oil change is performed by someone other than your
dealer, the message can be reset by referring to the steps
described under “Instrument Cluster Description/
Odometer/Trip Odometer” in “Understanding Your In-
strument Panel” for further information. At Each Stop for Fuel
•Check the engine oil level about five minutes after a
fully warmed engine is shut off. Checking the oil level
while the vehicle is on level ground will improve the
accuracy of the oil level reading. Add oil only when
the level is at or below the ADD or MIN mark.
•Check the windshield washer solvent and add if
required.
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SMAINTENANCE SCHEDULES 507

Once a Month
•Check tire pressure and look for unusual wear or
damage.
•Inspect the battery and clean and tighten the terminals
as required.
•Check the fluid levels of coolant reservoir, brake
master cylinder, power steering and transmission and
add as needed.
•Check all lights and other electrical items for correct
operation.At Each Oil Change
•Change the engine oil filter.
•Inspect the brake hoses and lines.
•Check the manual transmission fluid level.
CAUTION!
Failure to perform the required maintenance items
may result in damage to the vehicle.
Required Maintenance Intervals
Refer to the Maintenance Schedules on the following
pages for the required maintenance intervals.
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S508 MAINTENANCE SCHEDULES

ABS (Anti-Lock Brake System)............249,371
Adding Engine Coolant (Antifreeze) .......... 472
Adding Fuel ........................... 416
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 463
Air Conditioner Maintenance ............... 465
Air Conditioning ..................... 319,323
Air Conditioning Controls ................. 323
Air Conditioning, Operating Tips ............ 324
Air Conditioning Refrigerant ............... 466
Air Conditioning System .................. 323
Air Filter .............................. 463
Air Pressure, Tires ....................... 398
Airbag ................................ 50
Airbag Deployment ....................... 58
Airbag Light ....................... 60,77,250
Airbag Maintenance ....................... 60
Airbag, Side ............................ 57
Alarm Light ........................... 250
Alarm (Security Alarm) .................... 17 Alterations/Modifications, Vehicle
............. 8
Antenna, Satellite Radio ................308,313
Antifreeze (Engine Coolant) ................ 501
Anti-Lock Brake System (ABS) ............371,373
Anti-Lock Warning Light .................. 249
Appearance Care ........................ 482
Arming Theft System (Security Alarm) ......... 18
Assistance Towing ....................... 103
Auto Down Power Windows ................ 35
Automatic Transmission ................... 478
Fluid and Filter Changes ................. 478
Fluid Level Check ..................... 478
Fluid Type ........................... 478
Gear Ranges ......................... 342
Shifting ............................. 341
Special Additives ...................... 480
Torque Converter ...................... 345
Auxiliary Electrical Outlet (Power Outlet) ...... 150
Auxiliary Power Outlet ................... 150
536 INDEX

Axle Lock.......................... 350,351
Battery ............................... 463
Keyless Transmitter Replacement (RKE) ....... 23
Belts, Seat ............................ 39,77
Body Mechanism Lubrication ............... 466
Brake Assist System ...................... 374
Brake Assist Warning Light ................. 259
Brake Control System, Electronic ............. 373
Brake System ........................... 476
Anti-Lock (ABS) .................... 371,373
Master Cylinder ....................... 476
Parking ............................. 369
Warning Light ........................ 248
Brake/Transmission Interlock ............... 340
Break-In Recommendations, New Vehicle ........ 75
Bulb Replacement ..................... 497,498
Bulbs, Light ............................ 79 Capacities, Fluid
........................ 501
Caps, Filler Fuel ............................... 416
Power Steering ........................ 368
Car Washes ............................ 483
Carbon Monoxide Warning ...............76,415
Cargo Light ............................ 140
Cargo (Vehicle Loading) ................... 418
Cellular Phone ........................ 88,317
Center High Mounted Stop Light ............ 500
Certification Label ....................... 418
Changing A Flat Tire ..................... 442
Chart, Tire Sizing ........................ 389
Check Engine Light (Malfunction Indicator
Light) ............................. 257,457
Checking Your Vehicle For Safety ............. 75
Checks, Safety ........................... 75
Child Restraint .................... 61,62,69,72
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INDEX 537

Flooded, Starting...................... 332
Fuel Requirements .................. 41 1,501
Jump Starting ......................... 446
Oil .............................. 460,501
Oil Disposal .......................... 462
Oil Filter ............................ 462
Oil Selection .......................... 501
Overheating .......................... 440
Starting ............................. 331
Temperature Gauge .................... 251
Engine Oil Viscosity ...................... 462
Engine Oil Viscosity Chart ................. 462
Enhanced Accident Response Feature .......... 58
Entry System, Illuminated .................. 19
Event Data Recorder ...................... 60
Exhaust Gas Caution ................... 76,415
Exhaust System ....................... 76,468
Extender, Seat Belt ........................ 49
Exterior Finish Care ...................... 483 Exterior Lights
.......................... 79
Fabric Care ......................... 485,487
Fabric Top ............................. 487
Filters Air Cleaner .......................... 463
Engine Oil ........................... 462
Finish Care ............................ 483
Flashers Hazard Warning ....................... 440
Turn Signal ................... 79,247,499,500
Flooded Engine Starting ................... 332
Fluid Capacities ......................... 501
Fluid Leaks ............................. 79
Fluid Level Checks ...................... 482
Automatic Transmission ................. 478
Engine Oil ........................... 460
Manual Transmission ................... 481
Power Steering ........................ 368
540 INDEX

Jack Location........................... 442
Jack Operation .................... 442,444,445
Jacking Instructions ...................... 444
Jump Starting .......................... 446
Key, Programming ........................ 16
Key, Replacement ........................ 15
Key, Sentry (Immobilizer) ................... 14
Key-In Reminder ......................... 13
Keyless Entry System ...................... 19
Keys ................................. 12
Lane Change and Turn Signals .............. 247
Lane Change Assist ...................... 138
Lap Belts .............................. 39
Lap/Shoulder Belts ....................... 39
LATCH (Lower Anchors and Tether for
CHildren) ............................ 67,69
Latches ................................ 79 Lead Free Gasoline
....................... 411
Leaks, Fluid ............................ 79
Light Bulbs ............................. 79
Lights .............................. 79,136
Airbag .......................... 60,77,250
Alarm .............................. 250
Anti-Lock ........................... 249
Anti-Lock Warning ..................... 249
Back-Up ............................ 500
Brake Assist Warning ................259,385
Brake Warning ........................ 248
Bulb Replacement ...................... 498
Cargo .............................. 140
Center Mounted Stop ................... 500
Check Engine (Malfunction Indicator) ........ 257
Cruise .............................. 251
Daytime Running ...................... 139
Dimmer Switch, Headlight ............... 138
Electronic Stability Program (ESP) Indicator . 259,385
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INDEX 543

Maintenance Procedures................... 459
Maintenance Schedule .................... 506
Malfunction Indicator Light (Check Engine) . . 257,457
Manual, Service ......................... 531
Manual Transmission .................. 335,480
Fluid Level Check ..................... 481
Lubricant Selection ..................... 480
Shift Speeds .......................... 336
Master Cylinder (Brakes) .................. 476
Mini-Trip Computer ................... 260,261
Mirrors ................................ 86
Outside .............................. 87
Rearview ............................. 86
Vanity ............................... 88
Modifications/Alterations, Vehicle ............. 8
Modular Hard Top ....................... 160
Monitor, Tire Pressure System ............... 406
Mopar Parts ......................... 458,530
Multi-Function Control Lever ............... 136New Vehicle Break-In Period
................ 75
Occupant Restraints ....................... 37
Octane Rating, Gasoline (Fuel) .............. 411
Odometer ............................. 254
Trip ............................. 252,254
Off-Pavement Driving (Off-Road) ............ 354
Off-Road Driving (Off-Pavement) ............ 354
Oil Change Indicator ..................... 256
Oil Change Indicator, Reset ................. 256
Oil, Engine ............................ 460
Capacity ............................ 501
Dipstick ............................. 460
Filter ............................... 462
Identification Logo ..................... 461
Materials Added to ..................... 462
Pressure Warning Light .................. 247
Recommendation ................... 461,501
Viscosity ......................... 462,501
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INDEX 545