2008 FORD F150 check engine light

Harley-Davidson instrument cluster
Warning lights and gauges can alert you to a vehicle condition that may
become serious enough to cause expensive repairs. A warning light may
illuminate when a problem exists with one of your vehicle’s functions.
Many lights will illuminate when you start your vehicle to make sure the
bulb works. If any light remains on after starting the vehicle, refer to the
respective system warning light for additional information.
Service engine soon:TheService
engine soonindicator light
illuminates when the ignition is first
turned to the ON position to check
the bulb and to indicate whether the vehicle is ready for
Inspection/Maintenance (I/M) testing. Normally, the
Service engine soon

light will stay on until the engine is cranked, then turn itself off if no
malfunctions are present. However, if after 15 seconds the
Service
engine soon
light blinks eight times, it means that the vehicle is not
ready for I/M testing. See theReadiness for Inspection/Maintenance
(I/M) testingin theMaintenance and Specificationschapter.
Solid illumination after the engine is started indicates the On Board
Diagnostics System (OBD-II) has detected a malfunction. Refer toOn
board diagnostics (OBD-II)in theMaintenance and Specifications
chapter. If the light is blinking, engine misfire is occurring which could
damage your catalytic converter. Drive in a moderate fashion (avoid
heavy acceleration and deceleration) and have your vehicle serviced
immediately by your authorized dealer.
2008 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
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Under engine misfire conditions, excessive exhaust temperatures
could damage the catalytic converter, the fuel system, interior
floor coverings or other vehicle components, possibly causing a fire.
Electronic throttle control
(if equipped):Illuminates when
the engine has defaulted to a

limp-home
operation. Report the
fault to a dealer at the earliest opportunity.
On vehicles equipped with a message center, “ENGINE FAILSAFE
MODE” will be displayed, refer toMessage centerin theDriver
Controlschapter.
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.
Base, Base with Tachometer and
Family Carrier instrument
cluster
Mid, Luxury, Limited and
Harley-Davidson instrument
cluster
If the brake system warning light
does not illuminate at this time,
seek service immediately from your authorized dealer. Illumination after
releasing the parking brake indicates low brake fluid level and the brake
system should be inspected immediately by your authorized dealer.
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 authorized dealer. Driving extended distances with
the parking brake engaged can cause brake failure and the risk of
personal injury.
!
BRAKE
P!
BRAKE
2008 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
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MINI MESSAGE CENTER WARNING DISPLAYS (IF EQUIPPED)
Door ajar:Displays when the
ignition is in the ON position and
any door is open.
Low fuel:Displays when the fuel
level in the fuel tank is at or near
empty (refer toFuel gaugein this
chapter).
Check fuel cap:Displays when the
fuel cap may not be properly
installed. Continued driving with
this display on may cause the
Service engine soon warning light to
come on. Refer toFuel filler capin theMaintenance and
Specificationschapter.
Check gauge:Displays 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.
Trans fault:Displays when a
transmission problem has been
detected and shifting may be
restricted. If the light remains on,
have the system serviced
immediately by your authorized dealer.
Key-in-ignition warning chime:Sounds when the key is left in the
ignition in the OFF/LOCK or ACCESSORY position and the driver’s door
is opened.
Headlamps on warning chime:Sounds when the headlamps or parking
lamps are on, the ignition is off (the key is not in the ignition) and the
driver’s door is opened.
2008 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
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Battery voltage gauge:Indicates
the battery voltage when the
ignition is in the ON position. If the
pointer moves and stays outside the
normal operating range, have the
vehicle’s electrical system checked
by your authorized dealer as soon as
possible.
Engine oil pressure gauge:
Indicates engine oil pressure. The
needle should stay in the normal
operating range (between “L” and
“H”). If the needle falls below the
normal range, stop the vehicle, turn
off the engine and check the engine
oil level. Add oil if needed. If the oil level is correct, have your vehicle
checked by your authorized dealer.
Fuel gauge:Indicates
approximately how much fuel is left
in the fuel tank (when the ignition
is in the ON position). The fuel
gauge may vary slightly when the
vehicle is in motion or on a grade.
The arrow next to the fuel pump
icon indicates which side of the vehicle the fuel filler door is located.
For more information, refer toFilling the tankin theMaintenance and
Specificationschapter.
2008 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
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AUXILIARY POWER POINT (12VDC)
Power outlets are designed for accessory plugs only. Do not insert
any other object in the power outlet as this will damage the
outlet and blow the fuse. Do not hang any type of accessory or
accessory bracket from the plug. Improper use of the power
outlet can cause damage not covered by your warranty.
The auxiliary power point is located
on the instrument panel.
Do not use the power point for
operating the cigarette lighter
element (if equipped).
To prevent the fuse from being
blown, do not use the power
point(s) over the vehicle capacity of
12 VDC/180W. If the power point or
cigar lighter socket is not working, a
fuse may have blown. Refer toFuses and relaysin theRoadside
Emergencieschapter for information on checking and replacing fuses.
To have full capacity usage of your power point, the engine is required to
be running (in a safe manner) to avoid unintentional discharge of the
battery. To prevent the battery from being discharged:
•do not use the power point longer than necessary when the engine is
not running,
•do not leave battery chargers, video game adapters, computers and
other devices plugged in overnight or when the vehicle is parked for
extended periods.
An additional auxiliary power point
is located on the lower rear side of
the center console. The power point
is accessible from the rear seats.
Always keep the power point caps
closed when not being used.
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•Finally, have the engine block heater system checked during your fall
tune-up to be sure it’s in good working order.
How to use the engine block heater
Ensure the receptacle terminals are clean and dry prior to use. To clean
them, use a dry cloth.
Depending on the type of factory installed equipment, your engine block
heater system may consume anywhere between 400 watts or 1000 watts
of energy per hour. Your factory installed block heater system does not
have a thermostat; however, maximum temperature is attained after
approximately 3 hours of operation. Block heater operation longer than
3 hours will not improve system performance and will unnecessarily use
additional electricity.
Make sure system is unplugged and properly stowed before driving the
vehicle. While not in use, make sure the protective cover seals the
prongs of the engine block heater cord plug.
BRAKES
Occasional brake noise is normal. If a metal-to-metal, continuous grinding
or continuous squeal sound is present, the brake linings may be worn-out
and should be inspected by an authorized dealer. If the vehicle has
continuous vibration or shudder in the steering wheel while braking, the
vehicle should be inspected by an authorized dealer.
Refer toBrake system warning lightin theInstrument Cluster
chapter for information on the brake system warning light.
Base, Base with Tachometer and
Family Carrier instrument
cluster
Mid, Luxury, Limited and
Harley-Davidson instrument
cluster
!
BRAKE
P!
BRAKE
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Owners Guide (post-2002-fmt)
USA(fus)
Driving
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•Some noise is normal during operation. If the noise is excessive, check
for a low power steering fluid level before seeking service by your
authorized dealer.
•Heavy or uneven steering efforts may be caused by a low power
steering fluid level. Check for a low power steering fluid level before
seeking service by your authorized dealer.
•Do not fill the power steering fluid reservoir above the MAX mark on
the reservoir.
If the power steering system breaks down (or if the engine is turned
off), you can steer the vehicle manually, but it takes more effort.
If the steering wanders or pulls, check for:
•an improperly inflated tire
•uneven tire wear
•loose or worn suspension components
•loose or worn steering components
•improper steering alignment
A high crown in the road or high crosswinds may also make the steering
seem to wander/pull.
TRACTION-LOK AXLE (IF EQUIPPED)
This axle provides added traction on slippery surfaces, particularly when
one wheel is on a poor traction surface. Under normal conditions, the
Traction-Lok axle functions like a standard rear axle. The axle may
exhibit a slight noise or vibration in tight turns with low vehicle speed.
This is normal behavior and indicates the axle is working.
PREPARING TO DRIVE
Utility vehicles have a significantly higher rollover rate than
other types of vehicles.
In a rollover crash, an unbelted person is significantly more likely
to die than a person wearing a seat belt.
Utility vehicles and trucks have larger tires and increased ground
clearance, giving the vehicle a higher center of gravity than a passenger
car.
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dark. If either of the lamps are not operating, stop using the reverse
camera system, at least in the dark, until the lamp(s) are replaced and
functioning.
Servicing
•If the vehicle is in R (Reverse) and the screen in the rear view mirror
appears blue for three seconds and turns blank afterwards, the camera
is not working properly; have the system inspected by your authorized
dealer.
•If the image comes on while the vehicle is not in R (Reverse), have
the system inspected by your authorized dealer.
•If the vehicle is in R (Reverse) and the screen is blank and no blue
screen is observed, the mirror is not working properly; have the
system inspected by your authorized dealer.
•If the image is not clear, then check if there is anything covering the
lens such as dirt, mud, ice, snow, etc. If the image is still not clear
after cleaning, have your system inspected by your authorized dealer.
FOUR-WHEEL DRIVE (4WD) OPERATION (IF EQUIPPED)
For important information regarding safe operation of this type
of vehicle, seePreparing to drive your vehiclein this chapter.
Four–wheel drive (4WD) supplies power to all four wheels. 4WD should
not be operated on dry pavement; driveline damage may occur.
If equipped with the Electronic Shift 4WD System, and 4WD Low
is selected while the vehicle is moving above 3 mph (5 km/h), the
4WD system will not engage past 4WD High. This is normal and
should be no reason for concern.Refer toShifting to/from 4L (4WD
Low)for proper operation.
System indicator lights
•4X4 HI- Momentarily illuminates
when the engine is started.
Illuminates when 4H is selected.
•4X4 LOW– Momentarily
illuminates when the engine is
started. Illuminates when 4L is
selected.
4x4 HI
4x4
LOW
2008 F-150(f12)
Owners Guide (post-2002-fmt)
USA(fus)
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