2009 JEEP COMMANDER engine overheat

It is even more important to look for gasoline without
MMT in Canada, because MMT can be used at levels
higher than those allowed in the United States.
MMT is prohibited in Federal and California reformu-
lated gasoline.
Materials Added To Fuel
All gasoline sold in the United States is required to
contain effective detergent additives. Use of additional
detergents or other additives is not needed under normal
conditions and would result in additional cost. Therefore,
you should not have to add anything to the fuel.
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
•The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine performance
and damage the emission control system.
•An out-of-tune engine, or certain fuel or ignition
malfunctions, can cause the catalytic converter to
overheat. If you notice a pungent burning odor or
some light smoke, your engine may be out of tune or
malfunctioning and may require immediate service.
Contact your authorized dealer for service assistance.
•The use of fuel additives which are now being sold as
octane enhancers is not recommended. Most of these
products contain high concentrations of methanol.
Fuel system damage or vehicle performance problems
resulting from the use of such fuels or additives is not
the responsibility of the manufacturer.
NOTE:Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
370 STARTING AND OPERATING

WHAT TO DO IN EMERGENCIES
CONTENTS
Hazard Warning Flashers................ 400
If Your Engine Overheats................ 400
Jacking And Tire Changing............... 401
▫Jack Location....................... 402
▫Spare Tire Stowage................... 402
▫Spare Tire Removal................... 403
▫Preparations For Jacking................ 404▫Jacking Instructions................... 404
Jump Starting........................ 409
Emergency Tow Hooks — If Equipped....... 411
Towing A Disabled Vehicle............... 412
▫2–Wheel Drive Models Only............. 412
▫4–Wheel Drive Models Only............. 412
6

HAZARD WARNING FLASHERS
The Hazard Warning flasher switch is located on the
switch bank just above the climate controls.
Press the switch to turn on the Hazard
Warning flashers. When the Hazard
Warning flasher switch is activated, all
directional turn signals will flash on
and off to warn oncoming traffic of an
emergency. Press the switch a second
time to turn off flashers.
This is an emergency warning system and should not be
used when the vehicle is in motion. Use it when your
vehicle is disabled and is creating a safety hazard for
other motorists.
If it is necessary to leave the vehicle to go for service, the
Hazard Warning flasher will continue to operate with the
ignition key removed and the vehicle locked.NOTE:With extended use, the Hazard Warning flasher
may run down your battery.
IF YOUR ENGINE OVERHEATS
In any of the following situations, you can reduce the
potential for overheating by taking the appropriate ac-
tion.
•On the highways — Slow down.
•In city traffic — While stopped, put transmission in
NEUTRAL, but do not increase engine idle speed.
NOTE:There are steps that you can take to slow down
an impending overheat condition. If your air conditioner
is on, turn it off. The air conditioning system adds heat to
the engine cooling system and turning off the A/C
removes this heat. You can also turn the temperature
control to maximum heat, the mode control to floor, and
400 WHAT TO DO IN EMERGENCIES

Under normal operating conditions, the catalytic con-
verter will not require maintenance. However, it is im-
portant to keep the engine properly tuned to assure
proper catalyst operation and prevent possible catalyst
damage.
CAUTION!
Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition. In
the event of engine malfunction, particularly involv-
ing engine misfire or other apparent loss of perfor-
mance, have your vehicle serviced promptly. Contin-
ued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.NOTE:Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
WARNING!
A hot exhaust system can start a fire if you park over
materials that can burn. Such materials might be
grass or leaves coming into contact with your exhaust
system. Do not park or operate your vehicle in areas
where your exhaust system can contact anything that
can burn.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe
and abnormal catalyst overheating. If this occurs, stop
the vehicle, turn off the engine and allow it to cool.
Service, including a tuneup to manufacturer’s specifica-
tions, should be obtained immediately.
430 MAINTAINING YOUR VEHICLE

WARNING!
•The warning words DO NOT OPEN HOT on the
cooling system pressure cap are a safety precau-
tion. Never add engine coolant (antifreeze) when
the engine is overheated. Do not loosen or remove
the cap to cool an overheated engine. Heat causes
pressure to build up in the cooling system. To
prevent scalding or injury, do not remove the
pressure cap while the system is hot or under
pressure.
•Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or en-
gine damage may result.
Disposal of Used Engine Coolant
Used ethylene glycol-based engine coolant (antifreeze) is
a regulated substance requiring proper disposal. Check
with your local authorities to determine the disposal
rules for your community. To prevent ingestion by ani-
mals and children, do not store ethylene glycol-based
engine coolant (antifreeze) in open containers or allow it
to remain in puddles on the ground. If ingested by a
child, contact a physician immediately. Clean up any
ground spills immediately.
Coolant Level
The coolant bottle provides a quick visual method for
determining that the engine coolant (antifreeze) level is
adequate. With the engine idling, and warm to normal
operating temperature, the level of the engine coolant
(antifreeze) in the bottle should be between the ranges
indicated on the bottle.
MAINTAINING YOUR VEHICLE 435
7

Electronic Stability Program............... 326
Traction Control System................. 324
Electronic Roll Mitigation (ERM)............. 325
Electronic Speed Control (Cruise Control)...... 153
Electronic Stability Program (ESP)............ 326
Electronic Throttle Control Warning Light...... 199
Electronic Vehicle Information Center
(EVIC).............................197,200
Emergency, In Case of
Freeing Vehicle When Stuck............... 306
Hazard Warning Flasher................. 400
Jacking............................. 401
Jump Starting......................... 409
Tow Hooks.......................... 411
Emission Control System Maintenance......419,470
Engine
Air Cleaner.......................... 424
Block Heater......................... 296
Break-In Recommendations................ 73Compartment...................415,416,417
Compartment Identification.........415,416,417
Cooling............................. 431
Exhaust Gas Caution................42,74,371
Fails to Start.......................... 295
Flooded, Starting...................... 295
Fuel Requirements..................367,465
Multi-Displacement.................... 323
Oil ..............................422,465
Oil Change Interval.................... 422
Oil Disposal.......................... 424
Oil Filter............................ 424
Oil Filter Disposal..................... 424
Oil Selection.......................423,465
Oil Synthetic......................... 424
Overheating.......................... 400
Starting............................. 292
Temperature Gauge.................... 196
Engine Oil Viscosity...................... 423
500 INDEX

New Vehicle Break-In Period................ 73
Occupant Restraints....................... 42
Octane Rating, Gasoline (Fuel).............. 367
Odometer..........................197,198
Trip ................................ 197
Off-Pavement Driving (Off-Road)..........313,443
Off-Road Driving (Off-Pavement)..........313,443
Oil Change Indicator..................... 205
Oil Change Indicator, Reset................. 205
Oil, Engine............................ 422
Capacity............................ 465
Change Interval....................... 422
Dipstick............................. 422
Disposal............................ 424
Filter............................... 424
Filter Disposal........................ 424
Identification Logo..................... 423
Materials Added to..................... 424Recommendation...................423,465
Synthetic............................ 424
Viscosity.........................423,465
Onboard Diagnostic System..............418,419
Opener, Garage Door (HomeLink) ........... 162
Operator Manual (Owner’s Manual)............ 6
Outside Rearview Mirrors.................. 85
Overdrive............................. 302
Overdrive OFF Switch.................... 302
Overhead Console....................... 162
Overheating, Engine...................196,400
Owner’s Manual (Operator Manual).........6,491
Paint Care............................. 444
Paint Damage.......................... 444
Panic Alarm............................ 24
Park Sense System, Rear................... 156
Parking Brake.......................... 318
Passing Light........................... 146
INDEX 507
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