2007 DODGE DURANGO towing

ONBOARD DIAGNOSTIC SYSTEM — OBD II
Your vehicle is equipped with a sophisticated onboard
diagnostic system called OBD II. This system monitors
the performance of the emissions, engine, and automatic
transmission control systems. When these systems are
operating properly, your vehicle will provide excellent
performance and fuel economy, as well as engine emis-
sions well within current government regulations.
If any of these systems require service, the OBD II system
will turn on the “Malfunction Indicator Light.” It will
also store diagnostic codes and other information to
assist your service technician in making repairs. Al-
though your vehicle will usually be drivable and not
need towing, see your dealer for service as soon as
possible.CAUTION!
•Prolonged driving with the “Malfunction Indica-
tor Light” on could cause further damage to the
emission control system. It could also affect fuel
economy and driveability. The vehicle must be
serviced before any emissions tests can be per-
formed.
•If the “Malfunction Indicator Light” is flashing
while the engine is running, severe catalytic con-
verter damage and power loss will soon occur.
Immediate service is required.
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 loose fuel filler cap message will
be displayed in the instrument cluster. Tighten the gas
MAINTAINING YOUR VEHICLE 363
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Change Engine Oil
Road conditions and your style of driving affect the
interval at which your oil should be changed. Check the
following to determine ifANYapply to you:
•Day or night temperatures are below 32°F (0°C).
•Stop and Go driving.
•Extensive engine idling.
•Driving in dusty conditions.
•Short trips of less than 10 miles (16.2 km).
•More than 50% of your driving is at sustained high
speeds during hot weather, above 90°F (32°C).
•Trailer towing, Taxi, Police or delivery service (com-
mercial service).
•Off-Road or desert operation.
•If equipped for and operating with E-85 (ethanol)
fuel.
NOTE:IfANYof these apply to you then change your
engine oil every 3,000 miles (5 000 km) or 3 months,
whichever comes first and follow schedule “B” of the
Maintenance Schedulessection of this manual.
If none of these apply to you, then change your engine oil
at every interval shown on scheduleAof theMainte-
nance Schedulessection of this manual.
NOTE:Under no circumstances should oil change in-
tervals exceed 6,000 miles (10 000 km) or 6 months
whichever comes first.
4x4 Models, If Used Primarily For Off-Road Operation
Every 50 hours of use.
368 MAINTAINING YOUR 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 indicate severe
and abnormal catalyst overheating. If this occurs, the
vehicle should be stopped, the engine shut off and the
vehicle allowed to cool. Thereafter, service, including a
tune-up to manufacturer’s specifications, should be ob-
tained immediately.To minimize the possibility of catalyst 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 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
idling or malfunctioning operating conditions.
Maintenance Free Battery
The top of the maintenance free battery is permanently
sealed. You will never have to add water, nor is periodic
maintenance required.
374 MAINTAINING YOUR VEHICLE

EMISSION CONTROL SYSTEM MAINTENANCE
The “Scheduled” maintenance services, listed inbold
typeon the following pages must be done at the times or
mileages specified to assure the continued proper func-
tioning of the emission control system. These, and all
other maintenance services included in this manual,
should be done to provide best vehicle performance and
reliability. More frequent maintenance may be needed for
vehicles in severe operating conditions such as dusty
areas and very short trip driving.
Inspection and service also should be done any time a
malfunction is suspected.
NOTE:Maintenance, replacement, or repair of the emis-
sion control devices and systems on your vehicle may be
performed by any automotive repair establishment or
individual using any automotive part which has been
certified pursuant to U.S. EPA or, in the State of Califor-
nia, California Air Resources Board regulations.
MAINTENANCE SCHEDULES
There are two maintenance schedules that show the
requiredservice for your vehicle.
First is Schedule“B”. It is for vehicles that are operated
under the conditions that are listed below and at the
beginning of the schedule.
•Day or night temperatures are below 32° F (0° C).
•Stop and go driving.
•Extensive engine idling.
•Driving in dusty conditions.
•Short trips of less than 10 miles (16 km).
•More than 50% of your driving is at sustained high
speeds during hot weather, above 90° F (32° C).
•Trailer towing.
•Taxi, police, or delivery service (commercial service).
422 MAINTENANCE SCHEDULES
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At Each Oil Change
•Change the engine oil filter.
•Inspect the exhaust system.
•Inspect the brake hoses.
•Inspect the CV joints (if equipped) and front suspen-
sion components.
•Check the automatic transmission fluid level.
•Check the coolant level, hoses, and clamps.
Schedule “B”
Follow schedule “B” if you usually operate your vehicle
under one or more of the following conditions.
•Day or night temperatures are below 32° F (0° C).
•Stop and go driving.
•Extensive engine idling.
•Driving in dusty conditions.
•Short trips of less than 10 miles (16 km).
•More than 50% of your driving is at sustained high
speeds during hot weather, above 90° F (32° C).
•Trailer towing.
•Taxi, police, or delivery service (commercial service).
•Off-road or desert operation.
SCHEDULE “B” 425
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Miles 48,000 51,000 54,000 57,000 60,000
(Kilometers) (80 000) (85 000) (90 000) (95 000) (100 000)
Drain and refill automatic transmission fluid,
change filter (3.7L). This applies only if your ve-
hicle is used for police, taxi, fleet, or frequent
trailer towing.X
Drain and refill automatic transmission fluid and
change main sump filter (4.7L/5.7L only). This ap-
plies only if your vehicle is used for police, taxi,
fleet, or frequent trailer towing.X
Inspect transfer case fluid (4X4).X
Flush and replace engine coolant at 60 months, or
102, 000 miles (170 000 km) whichever comes first.X
SCHEDULE “B” 431
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Miles 105,000 108,000 111,000 114,000 117,000 120,000
(Kilometers) (175 000) (180 000) (185 000) (190 000) (195 000) (200 000)
Drain and refill automatic transmission fluid,
change filter (3.7L). This applies only if your
vehicle is used for police, taxi, fleet, or fre-
quent trailer towing.X
Drain and refill automatic transmission fluid
and change main sump filter and spin-on
cooler return filter if equipped. (4.7L/5.7L
only). This applies only if your vehicle is used
for police, taxi, fleet, or frequent trailer tow-
ing.X
Flush and replace engine coolant at 120
months, if not replaced at 102,000 miles (170
000 km).X
436 SCHEDULE “B”
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Emergency, In Case of
Freeing Vehicle When Stuck............... 284
Jacking............................. 347
Tow Hooks.......................... 355
Towing ............................. 356
Emission Control System Maintenance......... 422
Emission Related Components.............. 386
Engine
Air Cleaner.......................... 372
Block Heater......................... 253
Break-In Recommendations................ 71
Compartment......................361,362
Coolant (Antifreeze).................... 418
Exhaust Gas Caution................ 38,72,314
Fails to Start.......................... 252
Flooded, Starting...................... 252
Fuel Requirements..................... 417
Jump Starting......................... 353
Oil ...........................367,417,418Oil Filler Cap.................360,361,362,369
Oil Selection.......................... 417
Oil Synthetic......................... 370
Starting............................. 251
Temperature Gauge..................... 185
Entry System, Illuminated.................. 19
Equipment Identification Plate.............. 341
Event Data Recorder...................... 60
Exhaust Gas Caution.............. 38,72,314,380
Exhaust System....................... 72,380
Extender, Seat Belt........................ 50
ExteriorLighting ........................ 133
Fabric Care............................ 395
Filters
Air Cleaner.......................... 372
Engine Fuel.......................... 372
Engine Oil........................370,418
Engine Oil Disposal.................... 370
462 INDEX