2016 JEEP WRANGLER check engine light

the message will appear the next time the vehicle is
started. This might indicate a damaged cap. If the prob-
lem is detected twice in a row, the system will turn on the
MIL. Resolving the problem will turn the MIL off.
EMISSIONS INSPECTION AND MAINTENANCE
PROGRAMS
In some localities, it may be a legal requirement to pass
an inspection of your vehicle’s emissions control system.
Failure to pass could prevent vehicle registration.For states that require an Inspection and Mainte-
nance (I/M), this check verifies the “Malfunction
Indicator Light (MIL)” is functioning and is not
on when the engine is running, and that the OBD II
system is ready for testing.
Normally, the OBD II system will be ready. The OBD II
system may notbe ready if your vehicle was recently serviced, recently had a dead battery or a battery replace-
ment. If the OBD II system should be determined not
ready for the I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition actuated test, which
you can use prior to going to the test station. To check if
your vehicle’s OBD II system is ready, you must do the
following:
1. Cycle the ignition switch to the ON position, but do
not crank or start the engine.
NOTE: If you crank or start the engine, you will have to
start this test over.
2. As soon as you cycle the ignition switch to the ON position, you will see the “Malfunction Indicator Light
(MIL)” symbol come on as part of a normal bulb
check.
7
MAINTAINING YOUR VEHICLE 597

CAUTION!
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. Run the engine at idle, in PARK, to
warm the fluid.
8. Reinstall the engine cover and snap it down securely onto the four mounting studs.
9. Check for leaks. Release the parking brake.
NOTE: To prevent dirt and water from entering the
transmission after checking or replenishing fluid, make
sure 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.
Fluid And Filter Changes
Refer to the “Maintenance Schedule” for the proper
maintenance intervals.
In addition, change the fluid and filter if the fluid
becomes contaminated (with water, etc.), or if the trans-
mission is disassembled for any reason.
Clutch Hydraulic System (Manual Transmission)
— If Equipped
The clutch hydraulic system is fed by a segregated
volume of fluid within the brake system master cylinder
reservoir. In the event of leakage or wear, use only the
manufacturer’s recommended brake fluid. Refer to “Flu-
ids, Lubricants, And Genuine Parts” in “Maintaining
Your Vehicle” for further information.
7
MAINTAINING YOUR VEHICLE 635

NOTE:Under no circumstances should oil change inter-
vals exceed 10,000 miles (16,000 km), twelve 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.
Severe Duty All Models
Change Engine Oil at 4,000 miles (6,500 km) if the vehicle
is operated in a dusty and off road environment or is
operated predominately at idle or only very low engine
RPM’s. This type of vehicle use is considered Severe
Duty. Once A Month Or Before A Long Trip:
•
Check engine oil level
• Check windshield washer fluid level
• Check the tire inflation pressures and look for unusual
wear or damage
• Check the fluid levels of the coolant reservoir, brake
master cylinder, power steering and automatic trans-
mission, and fill as needed
• Check function of all interior and exterior lights
8
MAINTENANCE SCHEDULES 665

Caps, FillerFuel ................................ .539
Power Steering ........................ .477
Radiator (Coolant Pressure) ................628
Carbon Monoxide Warning ...............100, 538
Cargo Light ............................ .174
Car Washes ............................ .639
Cellular Phone ...........................115
Center High Mounted Stop Light ..............658
Certification Label ........................ .541
Chains, Tire ............................ .521
Changing A Flat Tire ...................... .573
Chart, Tire Sizing ........................ .500
Check Engine Light (Malfunction Indicator Light) . .597
Checking Your Vehicle For Safety ...............99
Checks, Safety ............................99
Child Restraint ............................75
Child Restraints Booster Seats ...........................79 Child Restraints
.........................75
Child Seat Installation .....................94
How To Stow An Unused ALR Seat Belt ........90
Infants And Child Restraints ................77
Install A LATCH-Compatible Child Restraint ....89
Installing Child Restraints Using The Vehicle Seat
Belt ..................................91
Locating The LATCH Anchorages ............86
Lower Anchors And Tethers For Children .......82
Older Children And Child Restraints ..........78
Seating Positions ........................81
Child Safety Locks .........................42
Clean Air Gasoline ....................... .535
Cleaning Wheels .............................. .641
Climate Control ......................... .415
Clock .......................... .359, 368, 385
Cold Weather Operation ....................435
Compact Disc (CD) Maintenance ..............412
684 INDEX

Fluid Capacities......................... .659
Fluid Leaks ............................ .104
Fluid Level Checks ....................... .638
Engine Oil ........................... .600
Manual Transmission ....................636
Power Steering ........................ .477
Fluids, Lubricants And Genuine Parts ...........660
Fog Lights .......................... .171, 657
Fog Light Service ........................ .657
Fold And Tumble Rear Seat ..................163
Folding Rear Seat ........................ .165
Folding Windshield ....................... .295
Four-Way Hazard Flasher ...................570
Four Wheel Drive ........................ .453
Operation ............................ .453
Shifting ............................. .453
Systems ............................. .453
Four Wheel Drive Operation .................454
Freeing A Stuck Vehicle .....................585 Front Axle (Differential)
.....................638
Fuel .................................. .534
Adding ............................. .539
Additives ............................ .537
Clean Air ............................ .535
Ethanol ............................. .535
Filler Cap (Gas Cap) .....................539
Gasoline ............................. .534
Gauge .............................. .324
Materials Added ....................... .537
Methanol ............................ .535
Octane Rating ..................... .534, 660
Requirements ...................... .534, 659
Specifications ......................... .660
Tank Capacity ......................... .659
Fueling ............................... .539
Fuses ................................. .647
Gas

Cap (Fuel Filler Cap) .............539, 541, 596
688 INDEX

Leaks, Fluid............................ .104
Life Of Tires ............................ .519
Light Bulbs ......................... .104, 654
Lights ............................. .104, 168
AirBag ........................71, 101, 320
Automatic Headlights ....................169
Back-Up ............................. .658
Brake Assist Warning ....................494
Brake Warning ..................... .318, 480
Bulb Replacement ...................... .656
Cargo .............................. .174
Center Mounted Stop ....................658
Daytime Running ...................... .172
Exterior ............................. .104
Fog............................. .171, 657
Hazard Warning Flasher ..................570
Headlights ........................ .169, 656
Headlight Switch ...................... .169
Hill Descent Control Indicator ..............497Illuminated Entry
........................21
Instrument Cluster ..................... .169
Interior ............................. .173
Lights On Reminder .....................171
Malfunction Indicator (Check Engine) .........326
Passing ............................. .171
Rear Servicing ........................ .658
Rear Tail Lamps ....................... .658
Seat Belt Reminder ..................... .316
Security Alarm ........................ .322
Service .............................. .656
Side Marker .......................... .658
Tire Pressure Monitoring (TPMS) ............328
Traction Control ....................... .494
Turn Signal ..................104, 170, 657, 658
Loading Vehicle ......................... .541
Tires ............................... .505
Locking
Axle........................... .459
Locks ..................................3810
INDEX 691

Automatic Door.........................41
Child Protection .........................42
Door .................................38
Power Door ............................40
Lubrication, Body ........................ .614
Lug Nuts .............................. .571
Maintenance Free Battery ....................609
Maintenance Procedures ....................599
Maintenance Schedule ..................... .664
Malfunction Indicator Light (Check Engine) . . .326, 597
Manual, Service ......................... .678
Manual Transmission ...................438, 636
Fluid Level Check ...................... .636
Lubricant Selection ...................636, 662
Shift Speeds .......................... .439
Master Cylinder (Brakes) ....................631
Methanol .............................. .535
Mini-Trip Computer ....................338, 347 Mirrors
.................................111
Automatic Dimming .....................112
Electric Powered ........................113
Electric Remote .........................113
Heated ...............................114
Outside ..............................112
Rearview .............................111
Vanity ...............................114
Modifications/Alterations, Vehicle ...............9
Modular Hard Top ....................... .206
Monitor, Tire Pressure System ................523
MOPAR Parts ........................ .598, 677
MTBE/ETBE ........................... .535
New Vehicle Break-In Period ..................98
Occupant Restraints ........................47
Octane Rating, Gasoline (Fuel) .............534, 660
Oil Change Indicator ...................... .353
692 INDEX