2006 DODGE GRAND CARAVAN check engine

Towing Tips
Before setting out on a trip, practice turning, stopping
and backing the trailer in an area away from heavy
traffic. Towing Tips — Automatic Transmission
The “ D ” range can be selected when towing. However, if
frequent shifting occurs while in this range, the “ 3 ” range
should be selected.
NOTE: Using the “ 3 ” range while operating the vehicle
under heavy operating conditions will improve perfor-
mance and extend transmission life by reducing exces-
sive shifting 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. See Schedule “ B ” in
section 8 of this manual for transmission fluid change
intervals.
NOTE: Check the automatic transmission fluid level
before towing.7 - Pin Connector362 STARTING AND OPERATING

MAINTAINING YOUR VEHICLECONTENTS
2.4L Engine ...........................396

3.3L/3.8L Engines ......................397

Onboard Diagnostic System — OBDII........398

Emissions Inspection And Maintenance
Programs ............................399

Replacement Parts ......................400

Dealer Service .........................400

Maintenance Procedures ..................401
▫ Engine Oil ..........................401 ▫ Engine Oil Filter ......................405
▫ Drive Belts — Check Condition And Tension . . 405
▫ Spark Plugs .........................406
▫ Engine Air Cleaner Filter ................406
▫ Catalytic Converter ....................407
▫ Maintenance-Free Battery ................409
▫ Air Conditioner Maintenance .............410
▫ Power Steering — Fluid Check ............412
▫ Front Suspension Ball Joints ..............412
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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.
Normally, the OBD system will be ready. The OBD
system may not be ready if your vehicle was recently
serviced, if you recently had a dead battery, or a battery
replacement. If the OBD system should be determined
not ready for the I/M test, your vehicle may fail the test. Your vehicle has a simple ignition key actuated test
which you can use prior to going to the test station. To
check if your vehicle ’ s OBD system is ready, you must do
the following:
1. Insert your ignition key into the ignition switch.
2. Turn the ignition to the ON position, but do not crank
or start the engine.
3. If you crank or start the engine, you will have to start
this test over.
4. As soon as you turn your key to the ON position, you
will see your MIL symbol come on as part of a normal
bulb check.
5. Approximately 15 seconds later, one of two things will
happen:
a. The MIL will flash for about 10 seconds and then
return to being fully illuminated until you turn off the MAINTAINING YOUR VEHICLE 399
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ignition key or start the engine. This means that your
vehicle ’ s OBD system is not ready and you should not
proceed to the I/M station.
b. The MIL will not flash at all and will remain fully
illuminated until you turn off the ignition key or start
the engine. This means that your vehicle ’ s OBD system
is ready and you can proceed to the I/M station.
If your OBD system is not ready, you should see your
authorized dealer or repair facility. If your vehicle was
recently serviced or had a battery failure or replacement,
you may need to do nothing more than drive your
vehicle as you normally would in order for your OBD
system to update. A recheck with the above test routine
may then indicate that the system is now ready.
Regardless of whether your vehicle ’ s OBD system is
ready or not ready, if the MIL symbol is illuminated
during normal vehicle operation, you should have your vehicle serviced before going to the I/M station. The I/M
station can fail your vehicle because the MIL symbol is on
with the engine running.
REPLACEMENT PARTS
Use of genuine Mopar  parts for normal/scheduled
maintenance and repairs is highly recommended to in-
sure the designed performance. Damage or failures
caused by the use of non-Mopar  parts for maintenance
and repairs will not be covered by the manufacturer ’ s
warranty.
DEALER SERVICE
Your dealer has the qualified service personnel, special
tools and equipment to perform all service operations in
an expert manner. Service Manuals are available which
include detailed service information for your vehicle.
Refer to these manuals before attempting any procedure
yourself.400 MAINTAINING YOUR VEHICLE

NOTE: Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
WARNING!You can be badly injured working on or around a
motor vehicle. Do only that service work for which
you have the knowledge and the proper equipment.
If you have any doubt about your ability to perform
a service job, take your vehicle to a competent
mechanic. MAINTENANCE PROCEDURES
The pages that follow contain the required maintenance
services determined by the engineers who designed your
vehicle.
Besides the maintenance items for which there are fixed
maintenance intervals, there are other items that should
operate satisfactorily without periodic maintenance.
However, if a malfunction of these items does occur, it
could adversely affect the engine or vehicle performance.
These items should be inspected if a malfunction is
observed or suspected.
Engine Oil
Checking Oil Level
To assure proper engine lubrication, the engine oil must
be maintained at the correct level. Check the oil level at
regular intervals, such as every fuel stop. MAINTAINING YOUR VEHICLE 401
7

The best time to check the engine oil level is about 5
minutes after a fully warmed engine is shut off or before
starting the engine after it has sat overnight.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Maintain
the oil level between the MIN and MAX markings on the
dipstick. Adding one quart of oil when the reading is at
the MIN mark will result in a MAX reading on these
engines.
CAUTION!Overfilling or underfilling will cause oil aeration or
loss of oil pressure. This could damage your engine. Engine Oil Dipstick402 MAINTAINING YOUR VEHICLE

Change Engine Oil
Road conditions and your kind of driving affects the
interval at which your oil should be changed. Check the
following list to see if any apply 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 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. If ANY of these apply to you, then change your engine oil
at every interval shown in schedule “ B ” of the “ Mainte-
nance Schedules ” section of this manual.
If none of these apply to you, then change your engine oil
at every interval shown on schedule “ A ” of the “ Main-
tenance Schedules ” section of this manual
NOTE: Under no circumstances should oil change in-
tervals exceed 6000 miles (10 000 km) or 6 months
whichever comes first.
Engine Oil Selection
For best performance and maximum protection under all
types of operating conditions, the manufacturer only
recommends engine oils that are API certified and meet
the requirements of DaimlerChrysler Material Standard
MS-6395. MAINTAINING YOUR VEHICLE 403
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Synthetic Engine Oils
There are a number of engine oils being promoted as
either synthetic or semi-synthetic. If you chose to use
such a product, use only those oils that are American
Petroleum Institute (API) Certified and have the recom-
mended SAE viscosity grade. Follow the maintenance
schedule that describes your driving type.
Materials Added to Engine Oil
The manufacture strongly recommends against the addi-
tion of any additives (other than leak detection dyes) to
the engine oil. Engine oil is an engineered product and
it ’ s performance may be impaired by supplemental ad-
ditives.
Disposing of Used Engine Oil And Oil Filters
Care should be taken in disposing of used engine oil and
oil filters from your vehicle. Used oil and oil filters,
indiscriminately discarded, can present a problem to the
environment. Contact your dealer, service station, or governmental agency for advice on how and where used
oil and oil filters can be safely discarded in your area.
Engine Oil Filter
The engine oil filter should be replaced at every engine
oil change.
Engine Oil Filter Selection
All the manufacturers engines have a full-flow type oil
filter. Use a filter of this type for replacement. The quality
of replacement filters varies considerably. Only high
quality filters should be used to assure most efficient
service. Mopar Engine Oil Filters are a high quality oil
filter and are recommended.
Drive Belts — Check Condition and Tension
At the mileage indicated in the maintenance schedule, all
belts should be checked for condition and proper tension.
Improper belt tension can cause belt slippage and failure. MAINTAINING YOUR VEHICLE 405
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