2007 JEEP WRANGLER check engine light

WARNING!
Worn brake hoses can burst and cause brake failure.
You could have an accident. If you see any signs of
cracking, scuffing, or worn spots, have the brake
hoses replaced immediately.
Brake Master Cylinder
The fluid level in the master cylinder should be checked
when performing under hood services, or immediately if
the BRAKE warning light shows system failure
Be sure to clean the top of the master cylinder area before
removing the cap. If necessary, add fluid to bring the
fluid level up to the requirements described on the brake
fluid reservoir. With disc brakes, fluid level can be
expected to fall as the brake pads wear. Brake fluid levelshould be checked when pads are replaced. However,
low fluid level may be caused by a leak and a checkup
may be needed.
Use only manufacturer’s recommended brake fluid, refer
to Fluids, Lubricants, and Genuine Parts for correct fluid
type.
WARNING!
•Use of a brake fluid that may have a lower initial
boiling point or unidentified as to specification,
may result in sudden brake failure during hard
prolonged braking. You could have an accident.
•Overfilling the brake fluid reservoir can result in
spilling brake fluid on hot engine parts and the
brake fluid catching fire.
MAINTAINING YOUR VEHICLE 387
7

At Each Stop for Fuel
•Check the engine oil level about 5 minutes after a fully
warmed engine is shut off. Checking the oil level while
the vehicle is on level ground will improve the accu-
racy 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, add as required.
Once a Month
•Check the 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 the coolant reservoir, brake
master cylinder, and transmission, and add as needed.
•Check all lights and all other electrical items for correct
operation.
At Each Oil Change
•Change the engine oil filter.
•Inspect the exhaust system.
•Inspect brake hoses.
•Inspect the CV joints (If equipped) and front suspen-
sion components.
•Check the coolant level, hoses, and clamps.
•After completion of off-road operation, the underside
of the vehicle should be thoroughly inspected. Exam-
ine threaded fasteners for looseness.
418 MAINTENANCE SCHEDULES
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ABS (Anti-Lock Brake System)............204,296
Adding Fuel........................... 325
Adding Washer Fluid..................... 194
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 375
Air Conditioner Maintenance............... 376
Air Conditioning.....................254,258
Air Conditioning Controls................. 258
Air Conditioning, Operating Tips............ 258
Air Conditioning Refrigerant............... 377
Air Conditioning System.................. 258
Air Filter.............................. 375
Air Pressure, Tires....................... 309
Airbag................................ 47
Airbag Deployment....................... 60
Airbag Light.........................62,204
Airbag Maintenance....................... 61
Airbag, Side............................ 58
Alarm (Security Alarm).................... 19
Alignment and Balance................... 315Alterations/Modifications, Vehicle............. 9
Antenna, Satellite Radio................... 248
Antifreeze (Engine Coolant)................ 412
Anti-Lock Brake System (ABS)............107,296
Anti-Lock Warning Light.................. 204
Appearance Care........................ 393
Arming Theft System (Security Alarm)......... 19
Auto Down Power Windows................ 33
Automatic Transmission................... 388
Fluid and Filter Changes................. 388
Fluid Level Check...................... 388
Fluid Type........................... 388
Gear Ranges.......................... 276
Shifting............................. 275
Special Additives...................... 390
Torque Converter...................... 280
Auxiliary Electrical Outlet (Power Outlet)....... 116
Auxiliary Power Outlet.................... 116
Axle Lock..........................285,286
450 INDEX

Check Engine Light
(Malfunction Indicator Light).............208,366
Child Restraint....................64,65,71,75
Child Restraint Tether Anchors.............70,71
Child Seat.............................. 69
Climate Control......................... 252
Clock...........................219,235,246
Compact Disc (CD) Maintenance............. 251
Compass.............................. 211
Compass Calibration..................... 213
Console............................... 118
Console, Floor.......................... 118
Contract, Service........................ 442
Converter, Catalytic...................... 373
Cooling System......................... 380
Adding Coolant (Antifreeze).............. 382
Coolant Capacity...................... 412
Coolant Level......................... 384
Disposal of Used Coolant................ 383Drain, Flush, and Refill.................. 381
Inspection........................... 380
Points to Remember.................... 384
Pressure Cap......................... 383
Selection of Coolant (Antifreeze).........381,412
Temperature Gauge..................... 205
Corrosion Protection..................... 393
Crankcase Emission Control System.......... 375
Cruise Light........................... 205
Cup Holder............................ 117
Customer Assistance..................... 440
Data Recorder, Event...................... 62
Daytime Running Lights................... 101
Dealer Service.......................... 368
Defroster, Rear Window................... 195
Defroster, Windshield...............253,255,256
Delay (Intermittent) Wipers................. 101
Diagnostic System, Onboard................ 365
452 INDEX

Turn Signal.....................203,410,411
Flooded Engine Starting................... 266
Fluid Capacities......................... 412
Fluid Level Checks...................... 392
Automatic Transmission................. 388
Engine Oil........................... 369
Manual Transmission................... 391
Power Steering........................ 377
Fluids, Lubricants and Genuine Parts.......... 413
Fog Light Service........................ 410
Fog Lights..........................100,410
Fold and Tumble Rear Seat.................. 90
Folding Rear Seat........................ 93
Folding Windshield...................... 187
Four Wheel Drive....................... 280
Shifting............................. 282
Four Wheel Drive Operation................ 280
Four-Way Hazard Flasher.................. 350
Front Axle (Differential)................... 392Fuel................................. 321
Filler Cap (Gas Cap).................... 325
Filter............................... 375
Gasoline............................ 321
Gauge.............................. 202
Materials Added....................... 323
Octane Rating........................ 321
Requirements......................... 412
Tank Capacity........................ 412
Fuel System Caution................324,326,327
Fuses................................ 400
Gas Cap (Fuel Filler Cap)...............325,366
Gasoline (Fuel)......................... 321
Gasoline, Reformulated................... 322
Gasoline/Oxygenate Blends................ 322
Gauges
Coolant Temperature.................... 205
Fuel................................ 202
INDEX 455
10

Instrument Cluster....................... 201
Instrument Panel and Controls.............. 200
Instrument Panel Lens Cleaning............. 397
Integrated Power Module (Fuses)............ 400
Interior Appearance Care.................. 396
Interior Lights........................... 97
Intermittent Wipers (Delay Wipers)........... 101
Introduction............................. 4
Jack Location........................... 352
Jack Operation.......................352,354
Jacking Instructions...................... 354
Jump Starting.......................... 356
Key, Programming........................ 18
Key, Replacement........................ 17
Key, Sentry (Immobilizer)................... 16
Key-In Reminder......................... 15
Keyless Entry System...................... 20Keys................................. 14
Lane Change and Turn Signals.............. 203
Lap Belts.............................. 37
Lap/Shoulder Belts....................... 37
LATCH
(Lower Anchors and Tether for CHildren).....70,71
Lead Free Gasoline...................... 321
Lights................................. 97
Airbag............................62,204
Anti-Lock........................... 204
Anti-Lock Warning..................... 204
Back-Up............................. 411
Brake Assist Warning................. 115,209
Brake Warning........................ 204
Bulb Replacement...................... 409
Cargo ............................... 97
Center Mounted Stop................... 411
Check Engine (Malfunction Indicator)........ 208
INDEX 457
10

Lower Anchors and Tether for CHildren
(LATCH)............................70,71
Lubrication, Body....................... 378
Maintenance Free Battery.................. 376
Maintenance Procedures................... 369
Maintenance Schedule.................... 416
Schedule “A”......................... 432
Schedule “B”......................... 419
Maintenance Schedules.................... 416
Malfunction Indicator Light (Check Engine) . . 208,366
Manual, Service......................... 444
Manual Transmission..................269,390
Fluid Level Check...................... 391
Lubricant Selection..................... 390
Shift Speeds.......................... 271
Master Cylinder (Brakes).................. 387
Mini-Trip Computer...................... 211
Mirrors................................ 85Outside.............................. 86
Rearview............................. 85
Modifications/Alterations, Vehicle............. 9
Modular Hard Top....................... 125
Monitor, Tire Pressure System............... 317
Mopar Parts.........................368,443
Multi-Function Control Lever................ 98
Navigation Radio........................ 245
Navigation System....................... 245
New Vehicle Break-In Period................ 77
Occupant Restraints....................... 36
Octane Rating, Gasoline (Fuel).............. 321
Odometer..........................208,210
Trip ..........................206,208,210
Off-Pavement Driving (Off-Road)............ 290
Off-Road Driving (Off-Pavement)............ 290
INDEX 459
10

INTRODUCTION INTRODUCTION Roll Over WarningHOW TO USE THIS MANUAL WARNINGS AND CAUTIONS VEHICLE IDENTIFICATION NUMBER VEHICLE MODIFICATIONS/ALTERATIONS THINGS TO KNOW BEFORE STARTING YOUR VEHICLE A WORD
ABOUT YOUR KEYS Ignition Key RemovalKey-In-Ignition ReminderSTEERING WHEEL LOCK - IF EQUIPPED To Manually Lock the Steering WheelTo Release the Steering Wheel LockSENTRY KEY IMMOBILIZER SYSTEM Important Note About ServiceReplacement
KeysCustomer Key ProgrammingGeneral InformationSECURITY ALARM SYSTEM - IF EQUIPPED To Set the AlarmTo Disarm the SystemILLUMINATED ENTRY REMOTE KEYLESS ENTRY - IF EQUIPPED To Unlock the Doors and Swing GateTo Lock the Doors and
Swing GateUsing The Panic AlarmTo Turn Off Flash Lights With LockProgramming Additional TransmittersGeneral InformationBattery ReplacementDOORS Front Door RemovalRear Door Removal (4 Door Models)DOOR LOCKS Manual Door LocksPower Door Locks -
If EquippedWINDOWS Power Windows - If EquippedWind BuffetingREAR SWING GATE OCCUPANT RESTRAINTS Lap/Shoulder BeltsRear Center Lap/Shoulder BeltRetractor Lock-OutAdjustable Upper Shoulder Belt AnchorageSeat Belt PretensionersEnhanced Seat
Belt Use Reminder System (BeltAlert)Seat Belts And Pregnant WomenSeat Belt ExtenderDriver And Front Passenger Supplemental Restraint Systems (SRS) Child RestraintENGINE BREAK-IN RECOMMENDATIONS SAFETY TIPS Exhaust GasSafety Checks You Should
Make Inside The VehicleSafety Checks You Should Make Outside The VehicleUNDERSTANDING THE FEATURES OF YOUR VEHICLE MIRRORS Inside Day/Night MirrorOutside MirrorsSEATS Front Seat AdjustmentManual Seat Height Adjustment - If EquippedFront Seat
Back ReclineFront Passenger Easy Entry Seat (2 Door Models)Head RestraintsFold And Tumble Rear Seat (2 Door Models)Removing the Rear Seat (2 Door Models)Replacing the Rear Seat (2 Door Models)60/40 Split Folding Rear Seat (4 Door Models)To Raise the Rear
SeatTO OPEN AND CLOSE THE HOOD LIGHTS Interior LightsMulti-Function Control LeverParking Lights, Instrument Panel Lights, and HeadlightsLights-On ReminderHeadlight Dimmer SwitchPassing LightFront Fog Lights - If EquippedTurn SignalsDaytime Running Lights
- If EquippedWINDSHIELD WIPERS AND WASHERS Intermittent Wiper SystemWindshield Wiper OperationWindshield WashersMist FeatureTILT STEERING COLUMN ELECTRONIC SPEED CONTROL - IF EQUIPPED To ActivateTo Set At A Desired SpeedTo Deactivate
To Resume SpeedTo Vary The Speed SettingManual TransmissionTo Accelerate For PassingELECTRONIC BRAKE CONTROL SYSTEM ABS (Anti-Lock Brake System)TCS (Traction Control System)BAS (Brake Assist System)ERM (Electronic Roll Mitigation)ESP (Electronic
Stability Program)ESP/BAS Warning LampELECTRICAL POWER OUTLET Electrical Outlet Use With Engine OffCUP HOLDERS STORAGE Console Storage CompartmentRear Storage CompartmentDUAL TOP - IF EQUIPPED Removing The Soft TopInstalling the Soft
TopFREEDOM TOP 3- PIECE MODULAR HARD TOP Front Panel(s) RemovalFront Panel(s) InstallationFront Panel(s) Installation Only (With Rear Hard Top Removed)Rear Panel RemovalRear Panel InstallationDOOR FRAME Door Frame Removal (2 Door Models)Door
Frame Installation (2 Door Models)Door Frame Removal (4 Door Models)Door Frame Installation (4 Door Models)SOFT TOP (2 DOOR MODELS) Folding Down TheSoft Top Putting Up The Soft Top SUNRIDER - 4 DOOR MODELS SOFT TOP (4 DOOR MODELS) Folding
Down The Soft Top Putting Up The Soft Top FOLDING WINDSHIELD Lowering the Windshield and Removing Side BarsRaising The Windshield And Replacing Side BarsREAR WINDOW FEATURES - HARD TOP ONLY Rear Window Wiper/Washer - If EquippedRear Window
Defroster - If EquippedUNDERSTANDING YOUR INSTRUMENT PANEL INSTRUMENT PANEL AND CONTROLS INSTRUMENT CLUSTER INSTRUMENT CLUSTER DESCRIPTION COMPASS AND TRIP COMPUTER - IF EQUIPPED Control ButtonsTrip Conditions
Compass Temperature DisplayRADIO GENERAL INFORMATION Radio Broadcast SignalsTwo Types of SignalsElectrical DisturbancesAM ReceptionFM ReceptionSALES CODE REQ - AM/FM STEREO RADIO AND 6-DISC CD/DVD CHANGER (MP3/WMA AUX JACK)
Operating Instructions - Radio ModeOperation Instructions - (DISC MODE for CD and MP3/WMA Audio Play, DVD-VIDEO)Notes On Playing MP3/WMA FilesLISTButton (DISC Mode for MP3/WMA Play)INFO Button (DISC Mode for MP3/WMA Play)SALES CODE RES
- AM/FM STEREO RADIO WITH CD PLAYER (MP3 AUX JACK) Operating Instructions - Radio ModeOperation Instructions - CD MODE for CD and MP3 Audio PlayNotes OnPlaying MP3 FilesLIST Button (CD Mode for MP3 Play)INFO Button (CD Mode for MP3 Play)
SALES CODE RER - AM/FM/CD/DVD RADIO WITH NAVIGATION SYSTEM - IF EQUIPPED Operating Instructions - Satellite RadioClock Setting ProcedureSATELLITERADIO - IF EQUIPPED System ActivationElectronic Serial Number/Sirius Identification Number
(ENS/SID)Selecting Satellite Mode (RSC Radios)Satellite AntennaReception QualityOperating Instructions - Satellite ModeOperating Instructions - Hands Free Phone (If Equipped)Operating Instructions - Video Entertainment System (VES) (If Equipped)CD/DVD DISC
MAINTENANCE RADIO OPERATION AND CELLULAR PHONES CLIMATE CONTROLS Manual Heater OnlyManual Air Conditioning and Heating System - If EquippedOperating TipsSTARTING AND OPERATING STARTING PROCEDURES Manual TransmissionAutomatic
TransmissionNormal StartingExtreme Cold Weather (below -20 degrees F or -29 degrees C)If Engine Fails to StartAfter StartingENGINE BLOCK HEATER - IF EQUIPPED MANUAL TRANSMISSION 6-Speed Manual TransmissionAUTOMATIC TRANSMISSION Shift Lock
Manual OverrideBrake/Transmission Interlock SystemAutomatic Transmission with OverdriveFOUR-WHEEL DRIVE OPERATION (COMMAND-TRAC OR ROCK-TRAC) - IF EQUIPPED Operating Instructions/PrecautionsShift PositionsShifting ProcedureTRAC-LOK REAR
AXLE - IF EQUIPPED AXLE LOCK (TRU-LOK) - RUBICON MODELS REAR AXLE LOCK - 4WD NON-RUBICON MODELS (IF EQUIPPED) ELECTRONIC SWAY BAR DISCONNECT - IF EQUIPPED ON-ROAD DRIVING TIPS OFF-ROAD DRIVING TIPS When To Use
4L (Low) RangeDriving Through WaterDriving In Snow, Mud and SandHill ClimbingTraction DownhillAfter Driving Off-RoadPARKING BRAKE ANTI-LOCK BRAKE SYSTEM POWER STEERING TIRE SAFETY INFORMATION Tire Markings Tire Identification Number (TIN)
Tire Loading and Tire PressureTIRES - GENERAL INFORMATION Tire PressureTire Inflation Pressures Tire Pressures for High Speed OperationRadial-Ply TiresTire SpinningTread Wear IndicatorsLife of TireReplacement TiresAlignment and BalanceTIRE CHAINS TIRE
ROTATION RECOMMENDATIONS TIRE PRESSURE MONITOR SYSTEM (TPMS) - IF EQUIPPED Base System - If EquippedGeneral InformationFUEL REQUIREMENTS Reformulated GasolineGasoline/Oxygenate BlendsMMT In GasolineMaterials Added To FuelFuel
System CautionsCarbon Monoxide WarningsADDING FUEL Fuel Filler Cap (Gas Cap)VEHICLE LOADING Certification LabelTRAILER TOWING Common Towing DefinitionsTrailer Hitch ClassificationTrailer Towing Weights (Maximum Trailer Weight Ratings)Trailer and
Tongue WeightTowing RequirementsTowing TipsRECREATIONAL TOWING (BEHIND MOTORHOME, ETC.) Towing - 2WD ModelsTowing - 4WD ModelsShifting Out Of Neutral (N)WHAT TO DO IN EMERGENCIES HAZARD WARNING FLASHERS IF YOUR ENGINE
OVERHEATS JACKING AND TIRE CHANGING Jack LocationSpare Tire StowagePreparations For JackingJacking InstructionsJUMP STARTING EMERGENCY TOW HOOKS - IF EQUIPPED TOWING A DISABLED VEHICLE MAINTAINING YOUR VEHICLE ENGINE
COMPARTMENT - 3.8L ONBOARD DIAGNOSTIC SYSTEM - OBD II Loose Fuel Filler Cap MessageEMISSIONS INSPECTION AND MAINTENANCE PROGRAMS REPLACEMENT PARTSDEALER SERVICE MAINTENANCE PROCEDURES Engine OilDrive Belts - Check
Condition and TensionSpark PlugsCatalytic ConverterCrankcase Emission Control SystemFuel FilterEngine Air Cleaner FilterMaintenance-Free BatteryAir Conditioner MaintenancePower Steering Fluid CheckDriveline And Steering Component LubricationBody Lubrication
Windshield Wiper BladesWindshield WashersExhaust SystemCooling SystemHoses and Vacuum/Vapor HarnessesBrake SystemAutomatic TransmissionHydraulic Clutch Fluid - Manual TransmissionManual TransmissionTransfer CaseFront/Rear Axle FluidAppearance Care
And Protection From CorrosionFUSES (TOTALLY INTEGRATED POWER MODULE) VEHICLE STORAGE REPLACEMENT BULBS - IF EQUIPPED BULB REPLACEMENT Head LightFront Park/Turn SignalFront Side MarkerFront Fog LightRear Tail, Stop, Turn Signal,
and Back-Up LightsCenter High Mounted Stop Light (CHMSL)FLUID CAPACITIES FLUIDS, LUBRICANTS AND GENUINE PARTS EngineChassisMAINTENANCE SCHEDULES EMISSION CONTROL SYSTEM MAINTENANCE MAINTENANCE SCHEDULES Schedule
BSchedule AIF YOU NEED CONSUMER ASSISTANCE SUGGESTIONS FOR OBTAINING SERVICE FOR YOUR VEHICLE Prepare For The AppointmentPrepare A ListBe Reasonable With RequestsIF YOU NEED ASSISTANCE WARRANTY INFORMATION (U.S. Vehicles
Only) MOPAR PARTS REPORTING SAFETY DEFECTS In CanadaPUBLICATION ORDER FORMS DEPARTMENT OF TRANSPORTATION UNIFORM TIRE QUALITY GRADES TreadwearTraction GradesTemperature GradesINDEX