2003 FORD EXPLORER check engine light

Check fuel cap (if equipped):
Illuminates when the fuel cap may
not be properly installed. Continued
driving with this light on may cause
the Service engine soon light to
come on.
Brake system warning light:To
confirm the brake system warning
light is functional, it will
momentarily illuminate when the
ignition is turned to the ON position when the engine is not running, or
in a position between ON and START, or by applying the parking brake
when the ignition is turned to the ON position. If the brake system
warning light does not illuminate at this time, seek service immediately
from your dealership. Illumination after releasing the parking brake
indicates low brake fluid level and the brake system should be inspected
immediately by your servicing dealership.
Driving a vehicle with the brake system warning light on is
dangerous. A significant decrease in braking performance may
occur. It will take you longer to stop the vehicle. Have the vehicle
checked by your dealer immediately.
Anti-lock brake system:If the
ABS light stays illuminated or
continues to flash, a malfunction has
been detected, have the system
serviced immediately. Normal
braking is still functional unless the brake warning light also is
illuminated.
Air bag readiness:If this light fails
to illuminate when ignition is turned
to ON, continues to flash or remains
on, have the system serviced
immediately. A chime will also
sound when a malfunction in the supplemental restraint system has been
detected.
CHECK
FUEL
CAP
ABS
Instrument Cluster
11

Safety belt:Reminds you to fasten
your safety belt. A chime will also
sound to remind you to fasten your
safety belt.
Charging system:Illuminates when
the battery is not charging properly.
Check gage (if equipped):
Illuminates when any of the
following conditions has occurred:
•The engine coolant temperature
is high.
•The engine oil pressure is low.
•The fuel gauge is at or near empty.
Hi temp low oil (if equipped):
Illuminates when the engine coolant
temperature is high or the engine oil
pressure is low. Refer to engine
coolant temperature gauge or engine
oil pressure gauge in this chapter).
Door ajar:Illuminates when the
ignition is in the ON position and
any door is open.
Overdrive off:Illuminates when
the overdrive function of the
transmission has been turned off,
refer to theDrivingchapter. If the
light flashes steadily, have the system serviced immediately.
AdvanceTrac
(if equipped):
Illuminates when the AdvanceTrac

system is active. If the light remains
on, have the system serviced
immediately.
CHECK
GAGE
DOOR
AJAR
O/D
OFF
Instrument Cluster
12

STARTING
Positions of the ignition
1. OFF/LOCK, shuts off the engine
and all accessories/locks the steering
wheel, gearshift lever and allows key
removal.
2. ACC, allows the electrical
accessories such as the radio to
operate while the engine is not
running. This position also unlocks
the steering wheel.
3. ON, all electrical circuits
operational. Warning lights illuminated. Key position when driving.
4. START, cranks the engine. Release the key as soon as the engine
starts.
Important safety precautions
When the engine starts, the idle RPM runs faster to warm the engine. If
the engine idle speed does not slow down automatically, have the vehicle
checked.
Before starting the vehicle:
1. Make sure all occupants buckle their safety belts. For more
information on safety belts and their proper usage, refer to theSeating
and safety restraintschapter.
2. Make sure the headlamps and electrical accessories are off.
•Make sure the parking brake is
set.
4
3
2
1
Driving
134

indicator light in the instrument cluster remains on while the engine is
running, have the system serviced immediately.
Pressing the control once will disable the AdvanceTrac
stability
enhancement and the engine power reduction portion of the traction
enhancement feature; the brake portion of the traction enhancement
feature will still function normally. Pressing and holding the control for
more than five seconds will disable the AdvanceTrac
stability
enhancementandtraction enhancement feature. If the vehicle is stuck
in snow or mud or when driving in deep sand, switching off the
AdvanceTrac
system may be beneficial so the wheels are allowed to
spin. If your vehicle seems to lose engine power while driving in deep
sand or very deep snow, switching off the AdvanceTrac
stability
enhancement feature will restore full engine power and will enhance
momentum through the obstacle.
Some drivers may notice a slight movement of the brake pedal when the
AdvanceTrac
performs a system self-check. During AdvanceTrac

operation you may experience the following:
•A rumble or grinding noise
•A slight deceleration of the vehicle
•The AdvanceTrac
indicator light will flash
•If your foot is on the brake pedal, you will feel a vibration in the
pedal.
•If the driving condition is severe and your foot is not on the brake, the
brake pedal will move to apply higher brake forces. You may also hear
a whoosh of air from under the instrument panel during this severe
condition.
All these conditions are normal during AdvanceTrac
operation.
Do not alter or modify your vehicle’s suspension or steering; the
resulting changes to the vehicle’s handling can adversely affect
the AdvanceTrac
system. Also, do not install a stereo
loudspeaker near the rear console or either rear seat. The
speaker vibrations can adversely affect the AdvanceTrac

sensors located in this area.
Aggressive driving in any road conditions can cause you to lose
control of your vehicle increasing the risk of severe personal
injury or property damage. The occurrence of an AdvanceTrac
event
is an indication that at least some of the tires have exceeded their
ability to grip the road; this may lead to an increased risk of loss of
vehicle control, vehicle rollover, personal injury and death. If you
experience a severe road event, SLOW DOWN.
Driving
141

•Do not mix with recycled coolant unless from a Ford-approved
recycling process (seeUse of Recycled engine coolantsection).
For vehicles with overflow coolant systems with a non-pressurized cap
on the coolant recovery system, add coolant to the coolant recovery
reservoir when the engine is cool. Add the proper mixture of coolant and
water to the“cold full”level. For all other vehicles, which have a coolant
degas system with a pressurized cap, or if it is necessary to remove the
coolant pressure relief cap on the radiator of a vehicle with an overflow
system, follow these steps to add engine coolant.
To reduce the risk of personal injury, make sure the engine is
cool before unscrewing the coolant pressure relief cap. The
cooling system is under pressure; steam and hot liquid can come out
forcefully when the cap is loosened slightly.
1. Before you begin, turn the engine off and let it cool.
2. When the engine is cool, wrap a thick cloth around the coolant
pressure relief cap on the coolant reservoir (an opaque plastic bottle).
Slowly turn cap counterclockwise (left) until pressure begins to release.
3. Step back while the pressure releases.
4. When you are sure that all the pressure has been released, use the
cloth to turn it counterclockwise and remove the cap.
5. Fill the coolant reservoir slowly with the proper coolant mixture (see
above), to within the“cold fill range”or the“cold full”level on the
reservoir. If you removed the radiator cap in an overflow system, fill the
radiator until the coolant is visible and radiator is almost full.
6. Replace the cap. Turn until tightly installed. (Cap must be tightly
installed to prevent coolant loss.)
After any coolant has been added, check the coolant concentration, refer
toChecking Engine Coolantsection. If the concentration is not 50/50
(protection to–34°F/–36°C), drain some coolant and adjust the
concentration. It may take several drains and additions to obtain a 50/50
coolant concentration.
Whenever coolant has been added, the coolant level in the coolant
reservoir should be checked the next few times you drive the vehicle. If
necessary, add enough 50/50 concentration of engine coolant and
distilled water to bring the liquid level to the proper level.
If you have to add more than 1.0 liter (1.0 quart) of engine coolant per
month, have your dealer check the engine cooling system. Your cooling
Maintenance and Specifications
232

•Do not turn off the ignition while your vehicle is moving, especially at
high speeds.
•Have the items listed in your scheduled maintenance guide performed
according to the specified schedule.
The scheduled maintenance items listed in the scheduled maintenance
guide are essential to the life and performance of your vehicle and to its
emissions system.
If other than Ford, Motorcraft or Ford-authorized parts are used for
maintenance replacements or for service of components affecting
emission control, such non-Ford parts should be equivalent to genuine
Ford Motor Company parts in performance and durability.
Do not park, idle, or drive your vehicle in dry grass or other dry
ground cover. The emission system heats up the engine
compartment and exhaust system, which can start a fire.
Illumination of the“Check Engine”light, charging system warning light
or the temperature warning light, fluid leaks, strange odors, smoke or
loss of engine power, could indicate that the emission control system is
not working properly.
Exhaust leaks may result in entry of harmful and potentially
lethal fumes into the passenger compartment.
Do not make any unauthorized changes to your vehicle or engine. By
law, vehicle owners and anyone who manufactures, repairs, services,
sells, leases, trades vehicles, or supervises a fleet of vehicles are not
permitted to intentionally remove an emission control device or prevent
it from working. Information about your vehicle’s emission system is on
the Vehicle Emission Control Information Decal located on or near the
engine. This decal identifies engine displacement and gives some tune up
specifications.
Please consult yourWarranty Guidefor complete emission warranty
information.
Readiness for Inspection/Maintenance (I/M) testing
In some localities, it may be a legal requirement to pass an I/M test of
the on-board diagnostics system. If your“Check Engine/Service Engine
Soon”light is on, refer to the description in theWarning lights and
chimessection of theInstrument clusterchapter. Your vehicle may not
pass the I/M test with the“Check Engine/Service Engine Soon”light on.
Maintenance and Specifications
245

A
Accessory delay ..........................48
Air bag supplemental restraint
system ........................113–114, 118
and child safety seats ............115
description ......................114, 118
disposal ....................................121
driver air bag ..................116, 119
indicator light .................117, 120
operation .........................116, 119
passenger air bag ...........116, 119
Air cleaner filter .......................254
Air conditioning ..........................28
All Wheel Drive (AWD),
driving off road .........................159
Ambulance packages ....................7
Antifreeze
(see Engine coolant) ................229
Anti-lock brake system
(see Brakes) ......................137–138
Anti-theft system ........................88
arming the system ....................88
disarming a triggered system ..89
Audio system (see Radio) ...17, 21
Automatic transmission
driving an automatic
overdrive .................................145
fluid, adding ............................247
fluid, checking ........................247
fluid, refill capacities ..............254
fluid, specification ..................259
Auxiliary power point .................47
Axle
lubricant specifications ..257, 259
refill capacities ........................254
B
Battery .......................................227acid, treating emergencies .....227
jumping a disabled battery ....195
maintenance-free ....................227
replacement, specifications ...254
servicing ..................................227
BeltMinder .................................109
Brakes ........................................137
anti-lock ...........................137–138
anti-lock brake system (ABS)
warning light ...........................138
fluid, checking and adding ....247
fluid, refill capacities ..............254
fluid, specifications .........257, 259
lubricant specifications ..257, 259
parking ....................................138
shift interlock ..........................143
C
Calculating load ........................169
Capacities for refilling fluids ....254
Cargo cover .................................74
Cassette tape player ...................17
CD-single premium .....................21
Cell phone use ............................44
Certification Label ....................261
Changing a tire .........................188
Child safety restraints ..............121
child safety belts ....................121
Child safety seats ......................124
attaching with tether straps ..128
in front seat ............................126
in rear seat ..............................126
Cleaning your vehicle
engine compartment ..............211
instrument panel ....................213
interior .....................................213
interior trim ............................213
Index
267

Engine oil ..................................221
checking and adding ..............221
dipstick ....................................221
filter, specifications ........225, 254
recommendations ...................225
refill capacities ........................254
specifications ..................257, 259
Exhaust fumes ..........................137
F
Fail safe cooling ........................234
Flexible Fuel Vehicle (FFV) ....235
Floor mats ...................................73
Fluid capacities .........................254
Foglamps .....................................33
Four-Wheel Drive vehicles .......149
driving off road ...............151, 159
indicator light .........................150
preparing to drive your
vehicle .....................................142
Fuel ............................................235
calculating fuel
economy ............................64, 241
cap ...........................................240
capacity ...................................254
choosing the right fuel ...........238
comparisons with EPA fuel
economy estimates .................244
detergent in fuel .....................240
filling your vehicle
with fuel ..................235, 240–241
filter, specifications ........241, 254
fuel pump shut-off switch .....177
improving fuel economy ........241
octane rating ...................238, 259
quality ......................................239
running out of fuel .................240
safety information relating to
automotive fuels .....................235Fuel - flex fuel vehicle
(FFV) .................................235, 238
Fuses ..................................178, 180
G
Garage door opener ..............46, 56
Gas cap (see Fuel cap) ............240
Gas mileage
(see Fuel economy) .................241
Gauges .........................................14
GAWR (Gross Axle Weight
Rating) .......................................167
calculating ...............................169
definition .................................167
driving with a heavy load ......167
location ....................................167
GVWR (Gross Vehicle Weight
Rating) .......................................167
calculating .......................167, 169
definition .................................167
driving with a heavy load ......167
location ....................................167
H
Head restraints ...........................91
Headlamps
aiming ........................................35
bulb specifications ....................38
daytime running lights .............33
flash to pass ..............................34
high beam .................................34
Heating
heating and air
conditioning system ...........27–28
HomeLink universal
transceiver (see Garage
door opener) .........................56, 59
Index
269