2007 JEEP COMMANDER check engine light

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 a lower gear range should
be selected.
NOTE:Using the ”Tow/Haul” mode (if equipped) or a
lower gear range while operating the vehicle under
heavy operating conditions will improve performance
and extend transmission life by reducing excessive shift-
ing 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 than
45 minutes of continuous operation. Refer to “Mainte-
nance 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:
City Driving
When stopped for short periods of time, put transmission
in neutral and increase engine idle speed.
Highway Driving
Reduce speed.
332 STARTING AND OPERATING

Loose Fuel Filler Cap Message
After fuel is added, the vehicle diagnostic system can
determine if the fuel filler cap is loose, improperly installed,
or damaged. A “CHECK GASCAP” message will be dis-
played in the EVIC (Refer to Section 4 of this manual).
Tighten the gas cap until aclickingsound is heard. This is
an indication that the gas cap is properly tightened.
This message may be temporarily overridden by pressing
either the C/T, STEP, or MENU buttons. However, after
one minute of no customer interaction, the EVIC will
display again the “CHECK GASCAP” message. The
message will remain displayed until the vehicle diagnos-
tic system can retest the fuel system. The test will
perform the next time the vehicle is started, if the vehicle
was keyed off above 40°F (4°C) outside temperature and
the following vehicle start is above 40°F (4°C) outside
temperature. It may be possible to have a message that
will not clear due to the test being disabled due to low
outside temperatures. If the test is performed and the
problem is gone, the message will disappear.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. See
your authorized dealer for service.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.
MAINTAINING YOUR VEHICLE 359
7

Windshield Wiper Blades
The rubber edges of the wiper blades and the windshield
should be cleaned periodically with a sponge or soft cloth
and a mild nonabrasive cleaner to remove accumulations
of salt or road film.
Operation of the wipers on dry glass for long periods
may cause deterioration of the wiper blades. Always use
washer fluid when using the wipers to remove salt or dirt
from a dry windshield.
Avoid using the wiper blades to wipe frost or ice from the
windshield. Keep the blade rubber out of contact with
petroleum products such as engine oil, gasoline, etc.
Windshield Washers — Front and Rear
On vehicles equipped with a Vehicle Information Center,
the low washer fluid level will be indicated. When the
sensor detects a low fluid level, the windshield will light
on the vehicle graphic outline and the “Washer Fluid
Low” message will be displayed.The fluid reservoir for the windshield washers and the
rear window washer is shared. It is located in the front of
the engine compartment (on the driver side), and should
be checked for fluid level at regular intervals. Fill the
reservoir with windshield washer solvent (not
antifreeze/coolant) and operate the system for a few
seconds to flush out the residual water.
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.
374 MAINTAINING YOUR VEHICLE

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.
408 MAINTENANCE SCHEDULES
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M
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D
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S

ABS (Anti-Lock Brake System)............177,275
Adding Fuel........................... 314
Adding Washer Fluid..................... 167
Adjustable Pedals....................... 130
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . 366
Air Conditioner Maintenance............... 371
Air Conditioning........................ 235
Air Conditioning, Operating Tips............ 244
Air Conditioning, Rear Zone................ 242
Air Conditioning Refrigerant............... 372
Air Conditioning System.................. 235
Air Filter.............................. 366
Air Pressure, Tires....................... 289
Airbag................................ 46
Airbag Deployment....................... 53
Airbag Light.......................55,69,177
Airbag Maintenance....................... 54
Alarm (Security Alarm).................18,178
Alarm System (Security Alarm)............... 18Alignment and Balance................... 294
Alterations/Modifications, Vehicle............. 9
Antenna, Satellite Radio................... 230
Antifreeze (Engine Coolant)................ 402
Disposal............................ 379
Anti-Lock Brake System (ABS)............135,275
Anti-Lock Warning Light.................. 177
Anti-Theft System.....................18,178
Appearance Care........................ 388
Auto Down Power Windows................ 30
Automatic Dimming Mirror................. 77
Automatic Door Locks..................... 27
Automatic Headlights.................... 120
Automatic Temperature Control (ATC)......... 236
Automatic Transmission................256,385
Adding Fluid......................... 386
Fluid and Filter Changes................. 385
Fluid Level Check...................... 385
Fluid Type........................... 385
438 INDEX

Finish Care............................ 389
Flashers.............................. 340
Hazard Warning....................... 340
Turn Signal.......................... 176
Flexible Fuel Vehicles
Cruising Range........................ 313
Engine Oil........................... 313
Fuel Requirements................... 311,312
Maintenance.......................... 314
Replacement Parts..................... 313
Starting............................. 313
Flipper Glass, Liftgate..................... 33
Flooded Engine Starting................... 252
Fluid Capacities......................... 402
Fluid Leaks............................. 70
Fluid Level Checks
Automatic Transmission................. 385
Engine Oil........................... 362
Power Steering........................ 372Fluids, Lubricants and Genuine Parts.......... 403
Fog Lights..........................123,183
Fold and Tumble Rear Seat................. 108
Folding Rear Seat.....................108,111
Four Wheel Drive....................... 264
Operation........................... 264
Systems............................. 264
Four Wheel Drive Operation................ 264
Four-Way Hazard Flasher.................. 340
Freeing A Stuck Vehicle................... 263
Front Axle (Differential)................... 384
Fuel................................. 307
Filler Cap (Gas Cap).................... 314
Gasoline............................ 307
Gauge.............................. 182
Hoses.............................. 381
Materials Added....................... 309
Octane Rating........................ 307
Requirements......................... 402
INDEX 443
10

LATCH
(Lower Anchors and Tether for CHildren).....61,63
Lead Free Gasoline...................... 307
Leaks, Fluid............................ 70
Life of Tires............................ 293
Liftgate................................ 32
Liftgate Flipper Glass...................... 33
Liftgate Window Wiper/Washer............. 166
Lights..............................70,119
Airbag............................55,177
Alarm............................... 69
Anti-Lock........................... 177
Automatic Headlights................... 120
Battery Saver......................... 120
Brake Assist Warning.................143,181
Brake Warning........................ 176
Courtesy/Reading..................... 125
Cruise.............................. 182
Daytime Running...................... 123Dimmer Switch, Headlight............. 119,124
Electronic Stability Program (ESP)
Indicator........................143,178,181
Electronic Throttle Control Warning......... 182
Fog .............................123,183
Four-Wheel Drive Indicator............... 181
Fuses............................... 393
Hazard Warning Flasher................. 340
Headlight Switch...................... 120
Headlights On With Wipers............... 121
High Beam Indicator.................... 176
Illuminated Entry....................... 19
Instrument Cluster..................120,122
Interior..........................122,125
Lights On Reminder.................... 123
Low Fuel............................ 183
LowTire ............................ 179
Malfunction Indicator (Check Engine)........ 176
Oil Pressure.......................... 178
446 INDEX

Passing............................. 124
Reading............................. 125
Seat Belt Reminder..................... 182
Security Alarm (Theft Alarm).............. 178
Service Engine Soon (Malfunction Indicator) . . . 176
SmartBeams.......................... 121
Tire Pressure Monitoring (TPMS)........... 179
Tow/Haul Indicator.................... 181
Traction Control....................143,178
Turn Signal........................ 119,124
Vanity Mirror.......................... 79
Voltage............................. 183
Load Floor, Cargo....................... 165
Loading Vehicle......................... 317
Tires ............................... 284
Locks................................. 26
Automatic Door........................ 27
Child Protection........................ 28
Door................................ 26Power Door........................... 27
Lower Anchors and Tether for CHildren
(LATCH)............................61,63
Lubrication, Body....................... 373
Luggage Rack (Roof Rack)................. 168
Lumbar Support........................ 105
Maintenance Free Battery.................. 369
Maintenance Procedures................... 362
Maintenance Schedule.................... 406
Schedule “A”......................... 421
Schedule “B”......................... 409
Maintenance Schedules.................... 406
Malfunction Indicator Light (Check Engine) . . 176,359
Manual, Service......................... 434
Master Cylinder (Brakes).................. 382
Memory Feature (Memory Seat)............. 113
Memory Seat........................... 113
Memory Seats and Radio.................. 113
INDEX 447
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