warning light FORD F-150 2021 Workshop Manual

•
Moderate braking is particularly
important since it allows you to
maximize the energy captured by the
regenerative braking system.
• Drive at steady speeds without
stopping.
• Anticipate stops; slowing down may
eliminate the need to stop.
• Driving on flat terrain.
• Drive at reasonable speeds and
observe posted speed limits.
• Shut all windows when driving at high
speeds.
• Combine errands and minimize
stop-and-go driving.
• Drive with the tonneau cover installed
if your vehicle comes with one.
• Keep the tires properly inflated and use
only the recommended size.
• Use the recommended engine oil.
• Follow the recommended maintenance
schedule and carry out the
recommended checks.
• Perform all scheduled maintenance.
Note: Having your engine running is not
always an indication of inefficiency. In some
cases, it is actually more efficient than
driving in electric mode.
Avoid these actions; they reduce your fuel
consumption:
• Revving the engine.
• Aggressive driving increases the
amount of energy required to move
your vehicle.
• Driving in lower temperatures during
the first 5–10 mi (12 –16 km) of driving.
• Idle for periods longer than one minute.
• Use the air conditioner or front
defroster. •
Adding certain accessories to your
vehicle like bug deflectors, rollbars,
light bars, running boards, ski racks or
luggage racks.
• Use the speed control in hilly terrain.
• Using fuel blended with alcohol.
• Drive a heavily loaded vehicle or tow a
trailer.
• Driving with the wheels out of
alignment.
DRIVING IN SPECIAL
CONDITIONS
EMERGENCY MANEUVERS
In an unavoidable emergency where you
must make a sudden sharp maneuver, turn
the steering wheel only as rapidly and as
far as required to avoid the emergency.
Apply smooth pressure to the accelerator
pedal or brake pedal as needed. Avoid
abrupt steering, acceleration and braking
changes. Abrupt changes could increase
the risk of vehicle roll over, loss of vehicle
control and personal injury. If possible, use
any available road surfaces to bring your
vehicle under control.
FLOOR MATS WARNING:
Use a floor mat
designed to fit the footwell of your
vehicle that does not obstruct the pedal
area. Failure to follow this instruction
could result in the loss of control of your
vehicle, personal injury or death. WARNING:
Pedals that cannot
move freely can cause loss of vehicle
control and increase the risk of serious
personal injury.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Driving Hints

SNOW PLOWING
PRECAUTIONS
WARNING: Modifying or adding
equipment to the front of your vehicle
could affect the performance of the
airbag system, increasing the risk of
injury. This includes the hood, bumper
system, frame, front body structure, tow
hooks, hood pins, push bar and
snowplows. WARNING:
Do not attempt to
service, repair, or modify the
supplementary restraint system or
associated components. Failure to
follow this instruction could result in
personal injury or death. WARNING:
All occupants of your
vehicle, including the driver, should
always properly wear their seatbelts,
even when an airbag supplemental
restraint system is provided. Failure to
properly wear your seatbelt could
seriously increase the risk of injury or
death. WARNING:
Do not spin the wheels
at over 34 mph (55 km/h). The tires may
fail and injure a passenger or bystander.
Note: Look for an alterer ’s label on your
vehicle from the snowplow installer
certifying that the installation meets all
applicable Federal Motor Vehicle Safety
Standards (FMVSS).
Note: Federal and some local regulations
require additional exterior lamps for
snowplow-equipped vehicles. Contact an
authorized dealer for additional information. Note:
Do not remove or defeat the tripping
mechanisms designed into the snow
removal equipment by its manufacturer.
Doing so could cause damage to your
vehicle and the snow removal equipment
as well as possible airbag deployment.
OPERATING YOUR VEHICLE
WITH A SNOWPLOW
Weight limits and guidelines for selecting
and installing the snowplow are in the Ford
Truck Body Builders Layout Book. For
additional information, visit
www .f or dbb a s. c om .
A typical snowplow installation affects the
following:
• Front gross axle weight rating. See
What Is the Gross Axle Weight
Rating
(page 413).
• Gross vehicle weight rating. See
What
Is the Gross Vehicle Weight Rating
(page
413).
• Braking and steering.
• Front wheel toe. See the
Ford
Workshop Manual.
• Headlight aim. See
Adjusting the
Headlamps (page 521).
• Tire air pressure. See Information on
the Tire Sidewall
(page 543).
Note: Do not exceed the front gross axle
weight rating or gross vehicle weight rating.
Note: Your vehicle may require rear ballast
weight for proper braking and steering.
Your vehicle has a driver and passenger
airbag supplemental restraint system. The
supplemental restraint system activates
in certain frontal and offset frontal
collisions when the vehicle sustains
sufficient longitudinal deceleration.
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Post-Incident
1. Do not store a severely damaged
vehicle with a lithium-ion battery inside
a structure or within 50 ft (15 m) of any
structure or vehicle.
2. Make sure that passenger and luggage
compartments remain ventilated.
3. As with any vehicle, call emergency assistance immediately if you see
sparks, smoke or flames coming from
the vehicle.
SWITCHING THE HAZARD
FLASHERS ON AND OFF The hazard flasher button is on
the instrument panel. Press the
button to switch the hazard
flashers on if your vehicle is creating a
safety hazard for other road users.
When you switch the hazard flashers on,
all front and rear direction indicators flash.
Note: The hazard flashers operate when
the ignition is in any position, or if the key is
not in the ignition. The battery loses charge
and could have insufficient power to restart
your vehicle.
Press the button again to switch them off.
JUMP STARTING THE VEHICLE
JUMP STARTING PRECAUTIONS WARNING: Batteries normally
produce explosive gases which can
cause personal injury. Therefore, do not
allow flames, sparks or lighted
substances to come near the battery.
When working near the battery, always
shield your face and protect your eyes.
Always provide correct ventilation. WARNING:
Keep batteries out of
reach of children. Batteries contain
sulfuric acid. Avoid contact with skin,
eyes or clothing. Shield your eyes when
working near the battery to protect
against possible splashing of acid
solution. In case of acid contact with skin
or eyes, flush immediately with water for
a minimum of 15 minutes and get prompt
medical attention. If acid is swallowed,
call a physician immediately. WARNING:
Use only adequately
sized cables with insulated clamps. WARNING:
Make sure that the
cables are clear of any moving parts and
fuel delivery system parts. WARNING: Connect batteries with
only the same nominal voltage. WARNING: If the engine is running
while the hood is open, stay clear of
moving engine components. Failure to
follow this warning could result in serious
personal injury or death.
Do not attempt to push-start an automatic
transmission vehicle. This could cause
transmission damage.
Do not disconnect the battery of the
disabled vehicle. This could damage your
vehicle's electrical system.
PREPARING THE VEHICLE
Use only a 12 volt supply to start your
vehicle.
Park the booster vehicle close to the hood
of the disabled vehicle, making sure the
two vehicles do not touch.
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5. Start the engine.
6. Check for leaks.
Note:
The water in fuel warning lamp turns
off after approximately two seconds with
the engine running.
Note: The in-tank pump will turn off
automatically after approximately 30
seconds.
CHANGING THE FUEL FILTER
- DIESEL
Your fuel filters must be changed at the
correct service interval or when you see the
low fuel pressure message appear. Refer
to scheduled maintenance for the correct
service interval.
CHANGING THE FUEL FILTER
- GASOLINE
Your vehicle has a lifetime fuel filter that
integrates with the fuel tank. It does not
need regular maintenance or replacement.
CHANGING THE 12V BATTERY WARNING: Batteries normally
produce explosive gases which can
cause personal injury. Therefore, do not
allow flames, sparks or lighted
substances to come near the battery.
When working near the battery, always
shield your face and protect your eyes.
Always provide correct ventilation. WARNING:
When lifting a
plastic-cased battery, excessive pressure
on the end walls could cause acid to flow
through the vent caps, resulting in
personal injury and damage to the
vehicle or battery. Lift the battery with a
battery carrier or with your hands on
opposite corners. WARNING:
Keep batteries out of
reach of children. Batteries contain
sulfuric acid. Avoid contact with skin,
eyes or clothing. Shield your eyes when
working near the battery to protect
against possible splashing of acid
solution. In case of acid contact with skin
or eyes, flush immediately with water for
a minimum of 15 minutes and get prompt
medical attention. If acid is swallowed,
call a physician immediately. WARNING:
Battery posts,
terminals and related accessories
contain lead and lead compounds,
chemicals known to the State of
California to cause cancer and
reproductive harm. Wash your hands
after handling
. WARNING:
This vehicle may have
more than one battery. Removing the
battery cables from only one battery
does not disconnect your vehicle
electrical system. Make sure you
disconnect the battery cables from all
batteries when disconnecting power.
Failure to do so may cause serious
personal injury or property damage.
The battery is in the engine compartment.
See
Under Hood Overview (page 504).
Your vehicle has a maintenance-free
battery. It does not require additional
water during service.
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Note:
To calibrate the steering angle
sensor, drive the vehicle above 30 mph
(50 km/h) for a minimum of 1.2 mi (2 km).
Make sure to drive straight ahead for a
minimum of 30 seconds. Several vehicle
functions are disabled and a warning light
could appear until the sensor is calibrated.
Battery Management System
The battery management system monitors
battery conditions and takes actions to
extend battery life. If excessive battery
drain is detected, the system temporarily
disables some of the following features:
• Heated rear window.
• Heated seats.
• Climate control.
• Heated steering wheel.
• Audio unit.
• Navigation system.
A message may appear in the information
display to alert you that battery protection
actions are active.
After battery replacement, or in some
cases after charging the battery with an
external charger, the battery management
system requires eight hours of vehicle sleep
time to relearn the battery state of charge.
During this time your vehicle must remain
fully locked with the ignition off.
Note: If you add electrical accessories or
components to the vehicle, it may adversely
affect battery performance and durability.
This may also affect the performance of
other electrical systems in the vehicle.
Battery Disposal Make sure that you dispose of
old batteries in an
environmentally friendly way.
Seek advice from your local authority
about recycling old batteries. ADJUSTING THE HEADLAMPS
Vertical Aim Adjustment
The headlamps on your vehicle are
properly aimed at the assembly plant. If
your vehicle has been in an accident,
contact an authorized dealer to check and
realign your headlamps.
Headlamp Aiming Target
8 feet (2.4 m).
A
Center height of lamp to ground.
B
25 feet (7.6 m).
C
Horizontal reference line.
D
1. Park your vehicle directly in front of a wall or screen on a level surface,
approximately
25 ft (7.6 m) away.
2. Measure the height from the center of your headlamp, indicated by a 3
millimeter circle on the lens, to the
ground and mark an
8 ft (2.4 m)
horizontal reference line on the vertical
wall or screen at this height, a piece of
masking tape works well.
3. Switch on the low beam headlamps to
illuminate the wall or screen and open
the hood. Cover one of the headlamps
so no light hits the wall.
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USING BEAD-LOCK WHEELS -
RAPTOR
Your vehicle comes with unique wheels
matched to the tires. To avoid damage to
your wheels:
•
Maintain proper tire pressure.
• Due to extreme tire and wheel width,
do not take your vehicle through an
automatic car wash that uses
mechanical tracks, as wheel damage
may result.
• When installing wheels, always torque
lug nuts to specification with a torque
wrench.
• Inspect your wheels for damage on a
regular basis. If you have a damaged
wheel, replace it immediately.
• If you encounter an abnormally harsh
impact, inspect the outside tire wall of
your wheels, both inside and out, for
damage.
Note: Ford Performance only recommends
using bead-lock rings from Ford
Performance Parts, in conjunction with the
original equipment manufacturer (OEM)
tire. Any other combination using this wheel
could result in air loss or tire failure.
Note: Converting the bead-lock compatible
wheel to true bead-locks is for off-road use
only. We do not approve of the use of true
bead-locks for on-road driving.
If your vehicles equipped with the optional
bead lock compatible wheel, you can
convert this wheel to use a true bead-lock
ring, which allows operation at low tire
pressures when off-road to minimize the
risk of de-beading the tire. See your local
Ford Performance Parts Dealer for more
information. Tire Care WARNING: Always re-inflate tires
to recommended tire pressures before
the vehicle is operated on-road. The
recommended pressure is located on the
tire label or safety certification label,
located on the B-pillar, inside the driver's
door. WARNING:
After off-road use,
before returning to the road, check the
wheels and tires for damage. Off-road
use may cause damage to your wheels
and tires that can lead to tire failure, loss
of vehicle control, serious injury or death. WARNING:
Replace the wheels
and tires with the exact original brand,
size and construction that came
originally on your vehicle. Use of any
other wheel or tire combinations, even
with identical size ratings, may result in
insufficient running clearances, tire
rubbing and eventual puncture. Failure
to follow tire replacement
recommendations can lead to tire failure,
loss of vehicle control, serious injury or
death.
Note: If you have reduced your tire pressure
for off-road use, the tire pressure monitoring
system (TPMS) warning light then activates
in the instrument panel as a reminder to
re-inflate the tires before returning to the
road.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Wheel and Tire Information

pressure sensors are mounted into
each tire on your trailer. The
sensors send a message to your
vehicle indicating the current
trailer tire pressure and
temperature.
If the trailer tire pressure
monitoring system detects that a
tire is low, a warning message
appears in the information display.
The trailer tire information screen
in the information display
highlights the tire with a low
pressure.
If the trailer tire pressure
monitoring system detects that a
tire temperature is over temp, a
warning message appears in the
Information display. The trailer tire
information screen in the
information display highlights the
tire with a high temperature.
The main function of the trailer tire
pressure monitoring system is to
warn you when your trailer tires
need air or if the tires are
experiencing high temperatures.
It can also warn you in the event
the system is no longer capable
of functioning as intended. See
Tire Pressure Monitoring
System – Information
Messages
(page 565). When a Temporary Spare or
New Tire is Installed
If you have replaced a trailer tire
with a new or spare tire, a warning
message appears and pressure
readings are no longer displayed
for that tire.
To restore the full function of the
trailer tire pressure monitoring
system:
•
Have the damaged wheel and
tire assembly repaired and
remounted to your trailer.
• Install the trailer tire pressure
monitoring sensor into the new
wheel and tire assembly.
• Perform the trailer tire pressure
monitoring system reset
procedure.
Trailer Tire Pressure
Monitoring System Reset
Procedure
Note: You need to perform the tire
pressure monitoring system reset
procedure after each tire rotation,
or when a new trailer tire pressure
sensor is installed into a trailer tire.
The trailer tire pressure monitoring
system can be reset through the
menu in the information display.
See Tire Pressure Monitoring
System – Information
Messages (page 565). Performing
the trailer setup process also
resets the trailer tire pressure
monitoring system.
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TIRE PRESSURE MONITORING
SYSTEM –
TROUBLESHOOTING
TIRE PRESSURE MONITORING
SYSTEM – WARNING LAMPS The low tire pressure warning
lamp has combined functions,
as it warns you when your tires
need air, and when the system is no longer
capable of functioning as intended. Action Required
Possible Cause
Warning Lamp
After inflating your tires to the manufac-
turer’s recommended pressure as shown
on the tire label, on the edge of driver
door or the B-pillar, drive your vehicle for
at least two minutes over 20 mph
(32 km/h) before the light turns off.
One or more tires are
significantly under inflated
Solid warning lamp
Repair the damaged road wheel and tire
and refit it to your vehicle to restore
operation of the system.
Temporary spare wheel
in use
Solid warning lamp
or flashing warning lamp
If the tires are inflated to the recom-
mended tire pressures and the temporary
spare wheel is not in use, the system
detected a fault that requires service.
Have your vehicle checked as soon as
possible.
Tire pressure monitoring
system malfunction
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TIRE PRESSURE MONITORING SYSTEM – INFORMATION MESSAGES
Action
Message
After inflating your tires to the manufacturer ’s recommended
pressure as shown on the Tire Label, on the edge of the driver
door or the B-Pillar, drive your vehicle for at least two minutes over 20 mph (32 km/h) before the light turns off.
Tire Pressure Low
The system has detected a fault that requires service. Haveyour vehicle checked as soon as possible.
Tire Pressure Monitor
Fault
The system has detected a fault that requires service or aspare tire is in use. Have your vehicle checked as soon as possible.
Tire Pressure Sensor
Fault
Trailer Tire Pressure Monitoring System Action
Message
One or more tires on your trailer is below the specifiedtire pressure.
Trailer Tire Low Specified:
Displays when one or more tires on your trailer is abovethe recommended temperature.
Trailer Tire Over Temperature
A trailer tire pressure sensor is malfunctioning. If the
warning stays on or continues to come on, contact an authorized dealer as soon as possible.
Trailer Tire Pressure Sensor
Fault
The trailer tire pressure monitoring system is
malfunctioning. If the warning stays on or continues to come on, contact an authorized dealer.
Trailer Tire Pressure Monitor
Fault
The system cannot detect the trailer tire pressuremonitoring system.
Trailer Tire Pressure Monitor
Capability Not Detected
The trailer tire pressure monitoring system is not setup.See
Tire Pressure Monitoring System (page 559).
Trailer Tire Pressure Indication
Not Setup See Manual
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Tire Pressure Monitoring System

CHANGING A FLAT TIRE
If you get a flat tire when driving, do not
apply the brake heavily. Instead, gradually
decrease your speed. Hold the steering
wheel firmly and slowly move to a safe
place on the side of the road.
Have a flat serviced by an authorized
dealer to prevent damage to the system
sensors. See Tire Pressure Monitoring
System Precautions (page 560). Replace
the spare tire with a road tire as soon as
possible. When repairing or replacing the
flat tire, have the authorized dealer inspect
the system sensor for damage.
Note: The use of tire sealant could damage
your tire pressure monitoring system. Only
use in roadside emergencies.
Note: The tire pressure monitoring system
indicator light illuminates when the spare
tire is in use. To restore the full function of
the monitoring system, you must mount all
road wheels that come with tire pressure
monitoring sensors on this vehicle.
Dissimilar Spare Wheel and Tire
Assembly Information WARNING:
Failure to follow these
guidelines could result in an increased
risk of loss of vehicle control, injury or
death.
If you have a dissimilar spare wheel and
tire, the intent of the spare wheel is for
temporary use only. This means that if you
need to use it, replace it as soon as
possible with a road wheel and tire
assembly that is the same size and type
as the road tires and wheels originally
provided by Ford. We define a dissimilar spare wheel and tire
assembly as a spare wheel and tire
assembly that is different in brand, size or
appearance from the road tires and
wheels.
Full-size dissimilar spare
When driving with the full-size dissimilar
spare wheel and tire assembly, do not:
•
Exceed
70 mph (113 km/h).
• Use more than one dissimilar spare
wheel and tire assembly at a time.
• Use snow chains on the end of the
vehicle with the dissimilar spare wheel
and tire assembly.
Engage any four-wheel drive mode. See
Four-Wheel Drive Limitations (page 292).
The usage of a full-size dissimilar spare
wheel and tire assembly can lead to
impairment of the following:
• Handling, stability and braking
performance.
• Comfort and noise.
• Ground clearance and parking at curbs.
• Winter weather driving capability.
• Wet weather driving capability.
• Four-wheel drive capability.
When driving with the full-size dissimilar
spare wheel and tire assembly, give
additional caution to:
• Towing a trailer.
• Driving vehicles that come with a
camper body.
• Driving vehicles with a load on the
cargo rack.
Drive cautiously when using a full-size
dissimilar spare wheel and tire assembly
and seek service as soon as possible.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Changing a Road Wheel