2006 JEEP COMMANDER check engine light

WARNING!
Abrasive material in any part of the brakes may
cause excessive wear or unpredictable braking. You
might not have full braking power when you need it
to prevent an accident. If you have been operating
your vehicle in dirty conditions, get your brakes
checked and cleaned as necessary.
•If you experience unusual vibration after driving in
mud, slush or similar conditions, check the wheels for
impacted material. Impacted material can cause a
wheel imbalance and freeing the wheels of it will
correct the situation.
MULTI DISPLACEMENT SYSTEM (MDS) - 5.7L
Engine Only
This feature offers improved fuel economy by shutting
off four of the engine’s eight cylinders during light load
and cruise conditions. The system is automatic with no
driver inputs or additional driving skills required.
NOTE:The MDS system may take some time to return
to full functionality after a battery disconnect.
280 STARTING AND OPERATING

If using a manual transmission vehicle for trailer towing,
all starts must be in FIRST gear to avoid excessive clutch
slippage.
Towing Tips — Automatic Transmission
The “D” range can be selected when towing. However, if
frequent shifting occurs while in this range, the ”Tow/
Haul” mode (if equipped) or the “3” range should be
selected. Shift the transmission to Drive position 2 on
more severe grades.
NOTE:Using the ”Tow/Haul” mode (if equipped) or
the “3” range while operating the vehicle under heavy
operating conditions will improve performance and ex-
tend transmission life by reducing excessive shifting and
heat build up. This action will also provide better engine
braking.
The automatic transmission fluid and filter should be
changed if you REGULARLY tow a trailer for more than45 minutes of continuous operation. See Schedule “B” in
section 8 of this manual for transmission fluid change
intervals.
NOTE:Check the automatic transmission fluid level
before towing.
Towing Tips — Electronic Speed Control (If
Equipped)

Don’t use in hilly terrain or with heavy loads.
When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
Use speed control in flat terrain and with light loads to
maximize fuel efficiency.
Towing Tips — Cooling System
To reduce potential for engine and transmission over-
heating, take the following actions:
322 STARTING AND OPERATING

cap until aclickingsound is heard. This is an indication
that the gas cap is properly tightened. Press the odometer
reset button to turn the message off. If the problem
persists, the message will appear the next time the
vehicle is started. This might indicate a damaged cap. If
the problem is detected twice in a row, the system will
turn on the Malfunction Indicator Light (MIL). Resolving
the problem will turn the MIL light 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 which have an I/M (Inspection and
Maintenance) requirement, this check verifies the
following: the MIL (Malfunction Indicator Lamp)is functioning and is not on when the engine is running,
and that the OBD (On Board Diagnostic) system is ready
for testing.
Normally, the OBD system will be ready. The OBD
system maynotbe ready if your vehicle was recently
serviced, if you recently had a dead battery, or a battery
replacement. If the OBD system should be determined
not ready for the I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition key actuated test
which you can use prior to going to the test station. To
check if your vehicle’s OBD system is ready, you must do
the following:
1. Insert your ignition key into the ignition switch.
2. Turn the ignition to the ON position, but do not crank
or start the engine.
3. If you crank or start the engine, you will have to start
this test over.
MAINTAINING YOUR VEHICLE 349
7

•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.
•Check the engine coolant/anti-freeze 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.
394 MAINTENANCE SCHEDULES
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ABS (Anti-Lock Brake System)............179,271
Adding Washer Fluid..................... 169
Adjustable Pedals....................... 147
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 358
Air Conditioner Maintenance............... 360
Air Conditioning........................ 232
Air Conditioning, Operating Tips............ 236
Air Conditioning, Rear Zone................ 243
Air Conditioning Refrigerant............... 361
Air Conditioning System.................. 232
AirFilter .............................. 358
Air Pressure, Tires....................... 290
Airbag................................ 42
Airbag Deployment....................... 54
Airbag Light....................... 56,70,179
Airbag Maintenance....................... 56
Alarm (Security Alarm)................. 25,180
Alarm System (Security Alarm)............... 25
Alignment and Balance................... 296Alterations/Modifications, Vehicle............. 9
Antenna, Satellite Radio................... 229
Antifreeze (Engine Coolant)................ 388
Anti-Lock Brake System (ABS)............132,271
Anti-Lock Warning Light.................. 179
Anti-Theft System..................... 25,180
Appearance Care........................ 377
Auto Down Power Windows................ 30
AutomaticDimmingMirror ................. 79
Automatic Door Locks..................... 20
Automatic Headlights.................... 123
Automatic Temperature Control (ATC)......... 237
Automatic Transmission................256,372
Adding Fluid......................... 374
Fluid and Filter Changes................. 372
Fluid Level Check...................... 373
FluidType ........................... 372
Special Additives...................... 375
Torque Converter...................... 262
420 INDEX

Fluid Leaks............................. 71
Fluid Level Checks
Automatic Transmission...............372,373
Engine Oil........................... 352
Power Steering........................ 361
Fluids, Lubricants and Genuine Parts.......... 389
Fog Lights..........................126,185
Fold and Tumble Rear Seat................. 109
Folding Rear Seat.....................109,113
Four Wheel Drive....................... 264
Operation........................... 264
Systems............................. 264
Four Wheel Drive Operation................ 264
Four-Way Hazard Flasher.................. 330
Freeing A Stuck Vehicle................... 263
Front Axle (Differential)................... 376
Fuel................................. 305
Filler Cap (Gas Cap).................... 309
Filler Door (Gas Cap)................... 309Gasoline............................ 305
Gauge.............................. 184
Materials Added....................... 307
Octane Rating........................ 305
Requirements......................... 388
Tank Capacity........................ 388
Fuel System Caution...................307,310
Fuses................................ 381
Garage Door Opener (HomeLink) ........... 152
Gas Cap (Fuel Filler Cap)...............309,348
Gasoline (Fuel)......................... 305
Gasoline, Reformulated................... 306
Gasoline/Oxygenate Blends................ 306
Gauges
Coolant Temperature.................... 182
Fuel................................ 184
Speedometer......................... 178
Tachometer.......................... 180
INDEX 425
10

Dimmer Switch, Headlight.............122,126
Electronic Stability Program (ESP)
Indicator........................140,180,183
Electronic Throttle Control Warning......... 184
Fog .............................126,185
Four-Wheel Drive Indicator............... 183
Fuses............................... 381
Hazard Warning Flasher................. 330
Headlight Switch...................... 122
Headlights On With Wipers............... 123
High Beam Indicator.................... 178
Illuminated Entry....................... 18
Instrument Cluster..................122,125
Interior..........................120,125
Lights On Reminder.................... 125
Low Fuel............................ 185
LowTire ............................ 181
Malfunction Indicator (Check Engine)........ 178
Oil Pressure.......................... 180Passing............................. 126
Reading............................. 121
Seat Belt Reminder..................... 183
Security Alarm (Theft Alarm).............. 180
Service Engine Soon (Malfunction Indicator) . . . 178
SmartBeams.......................... 124
Tire Pressure Monitoring (TPMS)........... 181
Tow/Haul Indicator.................... 183
Traction Control....................140,180
Turn Signal........................122,126
VanityMirror .......................... 82
Voltage............................. 185
Load Floor, Cargo....................... 166
Loading Vehicle
Tires ............................... 285
Locks................................. 18
Automatic Door........................ 20
Child Protection........................ 19
Door................................ 18
428 INDEX

Liftgate, Tailgate........................ 18
Power Door........................... 20
Lower Anchors and Tether for CHildren
(LATCH)............................ 63,64
Lubrication, Body....................... 363
Luggage Rack (Roof Rack)................. 169
Lumbar Support........................ 106
Maintenance Free Battery.................. 359
Maintenance Procedures................... 351
Maintenance Schedule.................... 392
Schedule “A”......................... 405
Schedule “B”......................... 395
Maintenance Schedules.................... 392
Malfunction Indicator Light (Check Engine) . . 178,349
Manual, Service......................... 416
Master Cylinder (Brakes).................. 371
Memory Feature (Memory Seat)............. 114
Memory Seat........................... 114Memory Seats and Radio.................. 114
Mini-Trip Computer...................... 195
Mirrors ................................ 78
Automatic Dimming..................... 79
Electric Powered....................... 81
Electric Remote........................ 81
Exterior Folding........................ 80
Heated.............................. 80
Outside.............................. 80
Rearview............................. 78
Vanity ............................... 82
Modifications/Alterations, Vehicle............. 9
Monitor, Tire Pressure System............... 297
Mopar Parts.........................350,415
Multi-Displacement Engine System........... 280
Multi-Function Control Lever............... 122
New Vehicle Break-In Period................ 68
INDEX 429
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