catalytic converter JEEP COMMANDER 2006 1.G Owners Manual

engine start. If the bulb does not come on when turning
the key from OFF to ON, have the condition checked
promptly.
Certain conditions such as a loose or missing gas cap,
poor fuel quality, etc. may illuminate the light after
engine start. The vehicle should be serviced if the light
stays on through several of your typical driving cycles. In
most situations the vehicle will drive normally and will
not require towing.
The Malfunction Indicator Light flashes to alert you to
serious conditions that could lead to immediate loss of
power or severe catalytic converter damage. The vehicle
should be serviced as soon as possible if this occurs. (See
page 348 for more information.)6. Airbag Warning Light
This light turns on and remains on for 6 to 8
seconds as a bulb check when the ignition
switch is first turned ON. If the light is not on
during starting, stays on, or turns on while
driving, have the system inspected by an authorized
dealer as soon as possible.
7. Anti-Lock Brake Warning Light
This light monitors the Anti-Lock Brake System.
The light will turn on when the ignition switch is
turned to the ON position and may stay on for as long as
four seconds.
If the ABS light remains on or turns on while driving, it
indicates that the Anti-Lock portion of the brake system
is not functioning and that service is required. However,
the conventional brake system will continue to operate
normally if the BRAKE warning light is not on.
UNDERSTANDING YOUR INSTRUMENT PANEL 179
4

•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 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.
Carbon Monoxide Warnings
WARNING!
Carbon monoxide (CO) in exhaust gases is deadly.
Follow the precautions below to prevent carbon
monoxide poisoning:
•Do not inhale exhaust gases. They contain carbon
monoxide, a colorless and odorless gas which can kill.
Never run the engine in a closed area, such as a
garage, and never sit in a parked vehicle with the
engine running for an extended period. If the vehicle is
stopped in an open area with the engine running for
more than a short period, adjust the ventilation system
to force fresh, outside air into the vehicle.
308 STARTING AND OPERATING

•Be sure your vehicle is not touching the jump start
vehicle.
•Observe all Battery Warnings in Section 7 of this
manual, while jump starting your vehicle.
WARNING!
Do not attempt to push or tow your vehicle to get it
started. Unburned fuel could enter the catalytic
converter and, once the engine has started, ignite and
damage the converter and vehicle.
EMERGENCY TOW HOOKS — IF EQUIPPED
If your vehicle is equipped with tow hooks, there will be
one in the rear and two mounted on the front of the
vehicle. The rear hook will be located on the driver’s side
of the vehicle.
NOTE:For off-road recovery, it is recommended to use
both of the front tow hooks to minimize the risk of
damage to the vehicle.
CAUTION!
Tow hooks are for emergency use only, to rescue a
vehicle stranded off road. Do not use tow hooks for
tow truck hookup or highway towing. You could
damage your vehicle.
340 WHAT TO DO IN EMERGENCIES

MAINTAINING YOUR VEHICLE
CONTENTS

3.7L Engine...........................345

4.7L Engine...........................346

5.7L Engine...........................347

Onboard Diagnostic System — OBD II........348
▫Loose Fuel Filler Cap Message............348

Emissions Inspection And Maintenance
Programs............................349

Replacement Parts......................350

Dealer Service.........................351
Maintenance Procedures..................351
▫Engine Oil..........................352
▫Drive Belts — Check Condition And
Tensioner...........................355
▫Spark Plugs.........................356
▫Catalytic Converter....................356
▫Crankcase Emission Control System........358
▫Air Cleaner Filter.....................358
▫Maintenance-Free Battery................359
7

Belts should be inspected for evidence of cuts, cracks,
glazing, or frayed cords and replaced if there is indication
of damage which could result in belt failure. Low gen-
erator belt tension can cause battery failure.
Also, check belt routing to make sure there is no inter-
ference between the belts and other engine components.
Spark Plugs
Spark plugs must fire properly to assure engine perfor-
mance and emission control. New spark plugs should be
installed at the specified mileage. The entire set should be
replaced if there is any malfunction due to a faulty spark
plug. Refer to the “Vehicle Emission Control Informa-
tion” label in the engine compartment for spark plug
information.
Catalytic Converter
The catalytic converter requires the use of unleaded fuel
only. Leaded gasoline will destroy the effectiveness of the
converter as an emission control device.
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.
356 MAINTAINING YOUR VEHICLE

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.
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 ex-
haust system. Do not park or operate your vehicle in
areas where your exhaust system can contact any-
thing 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 tune up to manufacturer’s specifica-
tions, should be obtained immediately.
MAINTAINING YOUR VEHICLE 357
7

To minimize the possibility of catalytic converter damage:
•Do not shut off the engine or interrupt the ignition
when the transmission is in gear and the vehicle is in
motion.
•Do not try to start the engine by pushing or towing the
vehicle.
•Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing.
•Do not idle the engine for prolonged periods during
very rough idle or malfunctioning operating condi-
tions.
•Do not allow vehicle to run out of fuel.
NOTE:Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
Crankcase Emission Control System
Proper operation of this system depends on freedom
from sticking or plugging due to deposits. As vehicle
mileage builds up, the PCV valve and passages may
accumulate deposits. If a valve is not working properly,
replace it with a new valve. DO NOT ATTEMPT TO
CLEAN THE OLD PCV VALVE!
Check ventilation hose for indication of damage or
plugging deposits. Replace if necessary.
Air Cleaner Filter
Under normal driving conditions, replace the air filter at
the intervals shown on “Maintenance Schedule A.” If,
however, you drive the vehicle frequently under dusty or
severe conditions, the filter element should be inspected
periodically and replaced if necessary at the intervals
shown on “Maintenance Schedule B.”
358 MAINTAINING YOUR VEHICLE

Autostick............................. 258
Auxiliary Electrical Outlet (Power Outlet)...... 162
Auxiliary Power Outlet................... 162
Battery............................... 359
Emergency Starting..................... 338
Keyless Transmitter Replacement (RKE)....... 24
Saving Feature (Protection)............... 122
Belts,Drive ............................ 355
Belts, Seat.............................. 33
Body Mechanism Lubrication............... 363
B-Pillar Location........................ 285
Brake Assist System...................... 133
Brake Control System, Electronic............. 131
Brake System........................... 370
Anti-Lock (ABS)....................132,271
Hoses.............................. 371
Master Cylinder....................... 371
Parking............................. 269Warning Light........................ 178
Brake/Transmission Interlock............... 257
Break-In Recommendations, New Vehicle........ 68
Bulb Replacement....................... 387
Capacities, Fluid........................ 388
Caps, Filler
Fuel................................ 309
Radiator (Coolant Pressure)............... 367
Car Washes............................ 377
Carbon Monoxide Warning............ 69,153,308
Cargo Area Features...................... 166
Cargo Compartment...................... 166
Luggage Carrier....................... 169
Cargo Load Floor........................ 166
Catalytic Converter...................... 356
Caution, Exhaust Gas..................... 153
CD (Compact Disc) Player...............200,214
Cellular Phone.......................... 82
INDEX 421
10

Chains, Tire............................ 303
Changing A Flat Tire..................... 332
Chart, Tire Sizing........................ 282
Checks, Safety......................... 70,71
Child Restraint.................... 58,59,64,66
Child Restraint Tether Anchors............. 63,64
Child Safety Locks........................ 19
Climate Control......................... 232
Clock ...........................202,216,223
Command View Skylights.................. 161
Compact Disc (CD) Maintenance............. 231
Compass.............................. 193
Compass Variance....................... 198
Computer, Trip/Travel.................... 193
Console, Overhead....................... 152
Contract, Service........................ 414
Converter, Catalytic...................... 356
Cooling System......................... 365
Adding Coolant (Antifreeze).............. 367Coolant Capacity...................... 388
Coolant Level......................... 368
Disposal of Used Coolant................ 368
Drain, Flush, and Refill.................. 366
Inspection........................... 365
Points to Remember.................... 369
Pressure Cap......................... 367
Radiator Cap......................... 367
Selection of Coolant (Antifreeze).........366,388
Courtesy Lights......................... 121
Crankcase Emission Control System.......... 358
Cruise Control (Speed Control).............. 148
CruiseLight ........................... 184
CupHolder ............................ 164
Customer Assistance..................... 412
Data Recorder, Event...................... 56
Daytime Running Lights................... 125
Dealer Service.......................... 351
422 INDEX