2021 FORD F-150 hood open

The system does not function if:
•
The passive key frequencies are
jammed.
• The key battery has no charge.
RESTARTING THE ENGINE AFTER
STOPPING IT - VEHICLES WITH:
PUSH BUTTON START
The system allows you to start the engine
within 10 seconds of switching it off, even
if it does not detect a valid passive key.
Within 10 seconds of switching the engine
off, fully press the brake pedal and press
the push button ignition switch. After 10
seconds, you can no longer start the engine
if the system does not detect a valid
passive key.
When you start the engine, it remains
running until you press the push button
ignition switch, even if your vehicle does
not detect a valid passive key. If you open
and close a door when the engine is
running, the system searches for a valid
passive key.
ENGINE BLOCK HEATER (IF
EQUIPPED)
ENGINE BLOCK HEATER
PRECAUTIONS WARNING:
Failure to follow engine
block heater instructions could result in
property damage or serious personal
injury. WARNING: Do not use your heater
with ungrounded electrical systems or
two-pronged adapters. There is a risk of
electrical shock. WARNING:
Do not fully close the
hood, or allow it to drop under its own
weight when using the engine block
heater. This could damage the power
cable and may cause an electrical short
resulting in fire, injury and property
damage.
We recommend that you do the following
for a safe and correct operation:
• Use a 16-gauge outdoor extension cord
that is product certified by
Underwriter ’s Laboratory (UL) or
Canadian Standards Association
(CSA). This extension cord must be
suitable for use outdoors, in cold
temperatures, and be clearly marked
Suitable for Use with Outdoor
Appliances. Do not use an indoor
extension cord outdoors. This could
result in an electric shock or become a
fire hazard.
• Use as short an extension cord as
possible.
• Do not use multiple extension cords.
• Make sure that when in operation, the
extension cord plug and engine block
heater cord plug connections are free
and clear of water. This could cause an
electric shock or fire.
• If the engine block heater cord is under
the hood, do not remove the wiring
from its original location. Do not close
the hood on the extension wiring.
• Park your vehicle in a clean area, clear
of combustible materials.
• Firmly connect the engine block heater
cord and the extension cord.
• Check the extension cord for heat
anywhere when the system has been
operating for approximately 30
minutes.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Starting and Stopping the Engine

WHAT IS AUTO-START-STOP
The system is designed to help reduce fuel
consumption and CO
2 emissions by
stopping the engine when it is idling, for
example at traffic lights.
AUTO-START-STOP
PRECAUTIONS WARNING: Apply the parking
brake, shift into park (P), switch the
ignition off and remove the key before
you leave your vehicle. Failure to follow
this instruction could result in personal
injury or death. WARNING:
Apply the parking
brake, shift into park (P), switch the
ignition off and remove the key before
you open the hood or have any service
or repair work completed. If you do not
switch the ignition off, the engine could
restart at any time. Failure to follow this
instruction could result in personal injury
or death.
SWITCHING AUTO-START-
STOP ON AND OFF
The system turns on when you switch the
ignition on. Press the button to switch the
system off.
Note: OFF
illuminates in the switch.
Note: Deactivating the system using the
button lasts only one key cycle.
Press the button again to switch the
system back on. Note:
The system turns off if it detects a
malfunction. If the system malfunctions,
have your vehicle checked as soon as
possible.
STOPPING THE ENGINE
Stop your vehicle, keep your foot on the
brake pedal and the transmission in drive
(D).
Note: Power assist steering turns off when
the engine stops.
RESTARTING THE ENGINE
Release the brake pedal or press the
accelerator pedal.
A message appears in the information
display if the system requires you to take
action.
AUTO-START-STOP
INDICATORS WARNING:
The system may
require the engine to automatically
restart when the auto-start-stop
indicator illuminates green or flashes
amber. Failure to follow this instruction
could result in personal injury. The Auto-Start-Stop indicator
illuminates green when the
engine stops. It flashes amber
and a message appears when you need to
take action. The Auto-Start-Stop indicator
illuminates gray with a
strikethrough when the system
is not available.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Auto-Start-Stop
(If Equipped) E146361

Before you start manual regeneration, do
the following:
•
Shift into park (P) and apply the
parking brake, on stable, level ground.
• Park your vehicle outside of any
structure.
• Park your vehicle 10– 15 ft (3–5 m)
away from any obstructions and away
from materials that can easily combust
or melt, for example paper, leaves,
petroleum products, fuels, plastics and
other dry organic material.
• Make sure there is a minimum of 1/8
tank of fuel.
• Make sure all fluids are at proper levels.
DIESEL PARTICULATE FILTER
MANUAL REGENERATION
LIMITATIONS
You cannot use manual regeneration until
the diesel particulate filter load percentage
has reached 100%. The diesel particulate
filter load percentage fluctuates up and
down when driving your vehicle due to
active and passive regenerations.
If your vehicle is operated with significant
stationary operation, low speed drive
cycles less than
25 mph (40 km/h), short
drive cycles, drive time less than 15 minutes
or the vehicle does not fully warm up,
passive and active regeneration may not
sufficiently clean the diesel particulate
filter system.
Aftermarket devices or modifications to
the exhaust system may reduce the
effectiveness of the exhaust system as
well as cause damage to the exhaust
system or engine. This may also degrade
vehicle performance and could lead to
engine damage that may not be covered
by the vehicle Warranty. STARTING DIESEL PARTICULATE
FILTER MANUAL REGENERATION
Start with your vehicle engine and when it
has reached the normal operating
temperature, press the information display
control button on the steering wheel. See
Instrument Cluster Display
(page 178).
If the diesel particulate filter is near or at
saturation, a message requesting
permission to initiate filter cleaning
appears in the information display. See
What Is the Diesel Particulate Filter
(page 268). Answer yes to this prompt and
then follow the next prompts regarding
exhaust position required to initiate
manual regeneration. Be sure to
understand each prompt. If you are not
sure what is being asked by each prompt,
contact an authorized dealer. The display
confirms the operation has started and
when it has finished. You can also drive to
clean the filter. When the system is at the point
of oversaturation, the service
engine warning lamp illuminates
and a message appears in the information
display. You cannot initiate filter cleaning.
You must have your vehicle checked as
soon as possible.
Once manual regeneration starts, engine
speed increases to approximately 1600
rpm and the cooling fan speed increases.
You will hear a change in audible sound
due to engine speed and cooling fan speed
increases.
It is not necessary to open the hood on the
engine compartment. Once manual
regeneration completes, the engine speed
returns to normal idling. The exhaust
system remains very hot for several
minutes even after regeneration is
complete. Do not reposition the vehicle
over materials that could burn until the
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Diesel Particulate Filter
(If Equipped)

WHAT IS THE HIGH VOLTAGE
BATTERY
The high voltage battery is a highly
sophisticated lithium ion battery system,
used to store electrified propulsion energy
to power the vehicle.
HIGH VOLTAGE BATTERY
PRECAUTIONS
WARNING: This battery pack
should only be serviced by an authorized
electric vehicle technician. Improper
handling can result in personal injury or
death. WARNING:
Apply the parking
brake, shift into park (P), switch the
ignition off and remove the key before
you open the hood or have any service
or repair work completed. If you do not
switch the ignition off, the engine could
restart at any time. Failure to follow this
instruction could result in personal injury
or death. WARNING:
Do not touch the
electronic ignition system parts after you
have switched the ignition on or when
the engine is running. The system
operates at high voltage. Failure to
adhere to this warning could result in
serious personal injury or death. WARNING:
Keep your hands and
clothing clear of the engine cooling fan.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing High Voltage Battery - Hybrid Electric Vehicle (HEV)

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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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Crash and Breakdown Information

MAINTENANCE PRECAUTIONS
Service your vehicle regularly to help
maintain its roadworthiness and resale
value. There is a large network of
authorized dealers that are there to help
you with their professional servicing
expertise. We believe that their specially
trained technicians are best qualified to
service your vehicle properly and expertly.
They are supported by a wide range of
highly specialized tools developed
specifically for servicing your vehicle.
If your vehicle requires professional service,
an authorized dealer can provide the
necessary parts and service. Check your
warranty information to find out which
parts and services are covered.
Use only recommended fuels, lubricants,
fluids and service parts conforming to
specifications. See Capacities and
Specifications (page 574).
• Do not work on a hot engine.
• Make sure that nothing gets caught in
moving parts.
• Do not work on a vehicle with the
engine running in an enclosed space,
unless you are sure you have enough
ventilation.
• Keep all open flames and other burning
material, such as cigarettes, away from
the battery and all fuel related parts.
• Set the parking brake, shift the
transmission to park (P) and block the
wheels. OPENING AND CLOSING THE
HOOD WARNING:
Make sure that you fully
latch the hood before driving. Failure to
follow this instruction could result in
personal injury or death. 1.
Pull the hood release handle under the
left hand side of the instrument panel. 2. Pull the secondary release lever under
the front of the hood near the center
of your vehicle.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing MaintenanceE337831 E338104

3. Raise the hood until the lift cylinders
hold it open.
4. To close, lower the hood and make sure that it fully latches.
UNDER HOOD OVERVIEW - 2.7L ECOBOOST™ Engine compartment fuse box. See Fuses (page 493).
A.
Battery.
See Changing the 12V Battery (page 519).
B.
Engine oil filler cap.
See Checking the Engine Oil Level (page 510).
C.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing MaintenanceE338089 E337516

The air conditioning may automatically
turn on and off during severe operating
conditions to protect the engine from
overheating. When the coolant
temperature decreases to the normal
operating temperature, the air conditioning
turns on.
If the coolant temperature gauge moves
fully into the red zone, or if the coolant
temperature warning or service engine
soon messages appear in your information
display, do the following:
1. Stop your vehicle as soon as it is safe
to do so. Fully apply the parking brake,
shift into park (P) or neutral (N).
2. Leave the engine running until the coolant temperature gauge needle
returns to the normal position. If the
temperature does not drop after
several minutes, follow the remaining
steps.
3. Switch the engine off and wait for it to
cool. Check the coolant level.
4. If the coolant level is at or below the minimum mark, add prediluted coolant
immediately.
5. If the coolant level is normal, restart the engine and continue. ENGINE AIR FILTER
CHECKING THE ENGINE AIR
FILTER RESTRICTION GAUGE -
DIESEL
The air filter restriction gauge is in the
upper housing of the air filter assembly.
Check the air filter restriction gauge
whenever you open the hood to carry out
general engine maintenance. Change the
air filter element when the restriction
gauge reads near the change filter line and
the gauge is yellow. Allowing the restriction
gauge to reach maximum affects engine
performance and fuel economy.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Maintenance E254173