catalytic converter JEEP COMMANDER 2007 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.
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 onduring 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.
If the ABS light is on, the brake system should be serviced
as soon as possible to restore the benefits of Anti-Lock
brakes. If the ABS light does not turn on when the
Ignition switch is turned to the ON position, have the
light inspected by an authorized dealer.
UNDERSTANDING YOUR INSTRUMENT PANEL 177
4

WARNING!
Never pour fuel or other flammable liquids into the
throttle body air inlet opening in an attempt to start
the vehicle. This could result in a flash fire causing
serious personal injury.
WARNING!
Do not attempt to push or tow your vehicle to get it
started. Vehicles equipped with an automatic trans-
mission cannot be started this way. Unburned fuel
could enter the catalytic converter and once the
engine has started, ignite and damage the converter
and vehicle. If the vehicle has a discharged battery,
booster cables may be used to obtain a start from a
booster battery or the battery in another vehicle. This
type of start can be dangerous if done improperly.
Refer to Section 6 of this manual for proper jump
starting procedures and follow them carefully.
STARTING AND OPERATING 253
5

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,
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 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:
310 STARTING AND OPERATING

MAINTAINING YOUR VEHICLE
CONTENTS
Engine Compartment – 3.7L...............355
Engine Compartment – 4.7L...............356
Engine Compartment – 5.7L...............357
Onboard Diagnostic System — OBD II........358
▫Loose Fuel Filler Cap Message............359
Emissions Inspection And Maintenance
Programs............................359
Replacement Parts......................361
Dealer Service.........................361Maintenance Procedures..................362
▫Engine Oil..........................362
▫Drive Belts — Check Condition And Tension . . 365
▫Spark Plugs.........................366
▫Spark Plug Wires.....................366
▫Engine Air Cleaner Filter................366
▫Catalytic Converter....................367
▫Crankcase Emission Control System........369
▫Maintenance-Free Battery................369
7

WARNING!
The air induction system (air cleaner, hoses, etc) can
provide a measure of protection in the case of engine
backfire. Do not remove the air induction system (air
cleaner, hoses, etc) unless such removal is necessary
for repair or maintenance. Make sure that no one is
near the engine compartment before starting the
vehicle with the air induction system (air cleaner,
hoses, etc) removed. Failure to do so can result in
serious personal injury.
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.
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.
MAINTAINING YOUR VEHICLE 367
7

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 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.To minimize the possibility of catalytic converter dam-
age:
•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, or for prolonged periods during very rough
idle or malfunctioning operating conditions.
368 MAINTAINING YOUR VEHICLE

Special Additives...................... 387
Torque Converter...................... 262
Autostick............................. 258
Auxiliary Electrical Outlet (Power Outlet)...... 162
Auxiliary Power Outlet................... 162
Battery............................... 369
Emergency Starting..................... 348
Keyless Transmitter Replacement (RKE)....... 24
Saving Feature (Protection)............... 120
Belts, Drive............................ 365
Belts, Seat.............................. 38
Body Mechanism Lubrication............... 373
B-Pillar Location........................ 284
Brake Assist System...................... 136
Brake Control System, Electronic............. 135
Brake System........................... 381
Anti-Lock (ABS)....................135,275
Hoses.............................. 382Master Cylinder....................... 382
Parking............................. 274
Warning Light........................ 176
Brake/Transmission Interlock............... 256
Break-In Recommendations, New Vehicle........ 67
Bulb Replacement....................... 401
Camera, Rear........................... 149
Capacities, Fluid........................ 402
Caps, Filler
Fuel................................ 314
Radiator (Coolant Pressure)............... 378
Car Washes............................ 389
Carbon Monoxide Warning............68,152,310
Cargo Area Features...................... 165
Cargo Compartment...................... 165
Luggage Carrier....................... 168
Cargo Load Floor........................ 165
Catalytic Converter...................... 367
INDEX 439
10

Caution, Exhaust Gas..................... 152
CD (Compact Disc) Player...............199,213
Cellular Phone.......................... 80
Certification Label....................... 317
Chains, Tire............................ 295
Changing A Flat Tire..................... 342
Chart, Tire Sizing........................ 281
Checks, Safety.........................69,70
Child Restraint......................57,63,65
Child Restraint Tether Anchors.............61,63
Child Safety Locks........................ 28
Climate Control......................... 233
Clock...........................201,215,221
Command View Skylights.................. 161
Compact Disc (CD) Maintenance............. 232
Compass.............................. 191
Compass Variance....................... 196
Computer, Trip/Travel.................... 191
Console, Overhead....................... 151Contract, Service........................ 432
Converter, Catalytic...................... 367
Cooling System......................... 375
Adding Coolant (Antifreeze).............. 377
Coolant Capacity...................... 402
Coolant Level......................... 379
Disposal of Used Coolant................ 379
Drain, Flush, and Refill.................. 376
Inspection........................375,379
Points to Remember.................... 379
Pressure Cap......................... 378
Radiator Cap......................... 378
Selection of Coolant (Antifreeze).........376,402
Courtesy Lights......................... 125
Crankcase Emission Control System.......... 369
Cruise Control (Speed Control).............. 132
Cruise Light........................... 182
Cup Holder............................ 163
Customer Assistance..................... 430
440 INDEX