2021 FORD F-350 fuel

PRINCIPLE OF OPERATION
MyKey allows you to program keys with
restricted driving modes to promote good
driving habits. You can program the
restrictions to all keys but one. Any keys
that you did not program are administrator
keys or admin keys.
You can use admin keys to:
•
Create a MyKey with certain vehicle
restrictions.
• Program certain MyKey settings.
• Clear all MyKey restrictions.
After you program a MyKey, you can view
the following information through the
information display:
• The total number of admin keys and
MyKeys for your vehicle.
• The total distance a MyKey driver
traveled with your vehicle.
Note: Every MyKey receives the same
restrictions and settings. You cannot
program them individually.
Note: For vehicles equipped with a
push-button start switch: When both a
MyKey and an admin key are present when
you start your vehicle, the system recognizes
the admin key only.
Standard Settings
Not every vehicle includes the features
listed below. If your vehicle has this
equipment, then you cannot change the
following settings when using a MyKey:
• Seatbelt reminder or Belt-Minder™.
MyKey mutes the audio system until
drivers, and in some instances,
passengers, fasten their seatbelts.
• Earlier low-fuel warning. The low-fuel
warning activates earlier for MyKey
drivers, giving them more time to refuel. •
Certain driver alerts, stability systems
or parking aids turn on automatically
when you use the MyKey system. For
example, Blind Spot Information
System (BLIS), cross traffic alert, lane
departure warning or forward collision
warning.
• Restricted touchscreen operation in
some markets. For example, MyKey
may prevent manual navigation
destination input while the vehicle is in
any gear other than park (P) or when
the vehicle reaches a certain rate of
speed.
• Satellite radio adult content
restrictions, if this feature is available
in your market.
Note: MyKey drivers may be able to switch
the lane departure warning feature off, but
this feature turns back on automatically
with every new key cycle.
Note: If your vehicle includes an AM/FM
radio or a very basic audio system, then the
radio may not mute.
Optional Settings
You can configure certain vehicle feature
settings when you first create a MyKey. You
can also change the settings afterward
with an admin key.
Note: Not every feature applies to every
vehicle in every market. When they are
available for your vehicle, then they appear
in your information display, providing
choices to switch them on or off, or to select
a more specific setting.
• Various vehicle speed limits so the
MyKey driver cannot exceed certain
speeds. The information display shows
warnings followed by an audible tone
when the MyKey driver reaches the set
speed. You cannot override the set
speed by fully depressing the
accelerator pedal.
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™

Blind Spot Information System (If
Equipped)
See
Blind Spot Information System
(page 254).
INTERIOR MIRROR WARNING:
Do not adjust the
mirrors when your vehicle is moving. This
could result in the loss of control of your
vehicle, serious personal injury or death.
Note: Do not clean the mirror housing or
glass with harsh abrasives, fuel or other
petroleum-based cleaning products.
You can adjust the interior mirror to your
preference. Some mirrors also have a
second pivot point. This lets you move the
mirror hear up or down and from side to
side.
Manual Dimming Mirror
Pull the tab below the mirror toward you
to reduce the effect of bright light from
behind.
Auto-Dimming Mirror
(If Equipped)
Note: Do not block the sensors on the front
and back of the mirror. A rear center
passenger or raised rear center head
restraint may also block light from reaching
the sensor.
The mirror dims to reduce glare when
bright lights are detected from behind your
vehicle. It automatically returns to normal
reflection when you shift the transmission
into reverse (R) to make sure you have a
clear view when backing up. SLIDING WINDOWS
(IF EQUIPPED)
Power Sliding Back Window
(If
Equipped) WARNING:
When operating the
power sliding back window, you must
make sure all rear seat occupants and
cargo are not in the proximity of the back
window. WARNING:
Do not leave children
unattended in your vehicle and do not
let them play with the power sliding back
window. They may seriously injure
themselves. The control is on the overhead console.
Press and hold the control to open the
window. Pull and hold the control to close
the window.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Windows and MirrorsE176217

GAUGES
Type 1 and 2
Engine oil pressure gauge.
A
Engine coolant temperature gauge.
B
Fuel gauge.
C
Transmission fluid temperature gauge.
D
Speedometer.
E
Information display. See General Information (page 110).
F
Tachometer.
G
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Type 3
Engine oil pressure gauge.
A
Engine coolant temperature gauge.
B
Fuel gauge.
C
Configurable. Transmission fluid temperature, Turbo boost or DEF gauge (diesel
engines only).
D
Speedometer.
E
Information display. See General Information (page 110).
F
Tachometer.
G
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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 your 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 an
authorized dealer.
Engine Coolant Temperature
Gauge
WARNING: Do not remove the
coolant reservoir cap when the engine is
on or the cooling system is hot. Wait 10
minutes for the cooling system to cool
down. Cover the coolant reservoir cap
with a thick cloth to prevent the
possibility of scalding and slowly remove
the cap. Failure to follow this instruction
could result in personal injury.
Indicates engine coolant temperature. At
normal operating temperature, the level
indicator will be in the normal range. If the
engine coolant temperature exceeds the
normal range, stop your vehicle as soon as
safely possible, switch off the engine and
let the engine cool.
Fuel Gauge
Note: The fuel gauge may vary slightly
when your vehicle is moving or on a slope.
The fuel gauge indicates about how much
fuel is in the fuel tank.
The arrow adjacent to the fuel pump
symbol indicates on which side of your
vehicle the fuel filler door is located. Low Fuel Reminder
A low fuel level reminder displays and
sounds when the distance to empty
reaches
75 mi (120 km) to empty for
MyKey, and at 50 mi (80 km), 25 mi
(40 km), 10 mi (20 km) and 0 mi (0 km)
for all vehicle keys.
Note: The low fuel reminder can appear at
different fuel gauge positions depending on
fuel economy conditions. This variation is
normal.
Transmission Fluid Temperature
Gauge
Indicates transmission fluid temperature.
At normal operating temperature, the level
indicator will be in the normal range. If the
transmission fluid temperature exceeds
the normal range, stop the vehicle as soon
as safely possible and verify the airflow is
not restricted such as snow or debris
blocking airflow through the grill. Also,
higher than normal operating temperature
can be caused by special operation
conditions (i.e. snowplowing, towing or
off-road use). Operating the transmission
for extended periods with the gauge in the
higher than normal area may cause
internal transmission damage. You need
to alter the severity of your driving
conditions to lower the transmission
temperature into the normal range. If the
gauge continues to show high
temperatures, see an authorized dealer.
Turbo Boost Gauge
(If Equipped)
Indicates the amount of manifold air
pressure in the engine.
DEF Gauge
(If Equipped)
Indicates the current DEF level.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Instrument Cluster

Battery
If it illuminates while driving, it
indicates a malfunction. Switch
off all unnecessary electrical
equipment and have the system checked
immediately.
Brake System Warning Lamp WARNING: Driving your vehicle
with the warning lamp on is dangerous.
A significant decrease in braking
performance may occur. It may take you
longer to stop your vehicle. Have your
vehicle checked as soon as possible.
Driving extended distances with the
parking brake engaged can cause brake
failure and the risk of personal injury.
This lamp is a dual function lamp and
illuminates when:
• You apply the parking brake with the
ignition on.
• Your vehicle has a brake fault or low
brake fluid level, regardless of parking
brake position. If the lamp illuminates while you
are moving, you may have the
parking brake applied. Be sure
that the parking brake is off.
Have your vehicle checked as
soon as possible if the lamp
continues to illuminate.
Note: Indicators vary depending on region.
Blind Spot Monitor
(If Equipped) Illuminates when you switch this
feature off or in conjunction with
a message. See
Blind Spot
Information System (page 254). 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
warning indicator to come on.
Check 4X4
(If Equipped) Illuminates with a message
when a four-wheel drive fault is
present. See Using Four-Wheel
Drive
(page 213).
Cruise Control
(If Equipped) Illuminates when you switch this
feature on. See
Switching
Cruise Control On and Off
(page
242).
Diesel Engine Brake
(If Equipped) Illuminates when you switch the
manual engine brake on. See
General Information
(page
223). Illuminates when you switch the
automatic engine brake on. See
General Information
(page
223).
Diesel Exhaust Fluid
(If Equipped) With the key in the on position,
illuminates when the DEF is
contaminated, low or someone
has tampered with the DEF system. See
Selective Catalytic Reductant System
(page
197).
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Direction Indicator
Illuminates when you switch on
the left or right direction
indicator or the hazard warning
flasher. If the indicators stay on or flash
faster, check for a burned out bulb.
Door Ajar Displays when the ignition is on
and any door is not completely
closed.
Electronic Locking Differential (If
Equipped) Illuminates when using the
electronic locking differential.
Engine Coolant Temperature Illuminates when the engine
coolant temperature is high.
Stop your vehicle as soon as
possible, switch off the engine and let it
cool.
Engine Oil If it illuminates with the engine
running or when you are driving,
this indicates a malfunction.
Stop your vehicle as soon as it is safe to
do so and switch the engine off. Check the
engine oil level.
See
Engine Oil Check (page 352).
Note: Do not resume your journey if it
illuminates despite the level being correct.
Have the system checked immediately.
Fasten Seatbelt Illuminates and a tone sounds
to remind you to fasten your
seatbelt. Front Airbag If it fails to illuminate when you
start your vehicle, continues to
flash or remains on, it indicates
a malfunction. Have the system checked
as soon as possible.
Front Fog Lamps
(If Equipped) Illuminates when you switch the
front fog lamps on.
High Beam Illuminates when you switch the
high beam headlamps on. It
flashes when you use the
headlamp flasher.
Hill Descent
(If Equipped) Illuminates when hill descent is
switched on.
Low Fuel Level Illuminates when the fuel level
is low or the fuel tank is nearly
empty. Refuel as soon as
possible.
Low Tire Pressure Warning Illuminates when the tire
pressure in one or more tires is
below the correct tire pressure.
It also illuminates momentarily when you
switch the ignition on to confirm the lamp
is functional. If it does not illuminate when
you switch the ignition on, or begins to
flash at any time, have the system checked
as soon as possible.
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Powertrain Malfunction/Reduced
Power/Electronic Throttle Control
Illuminates when a powertrain
or a 4WD fault has been
detected. Have your vehicle
checked as soon as possible.
Service Engine Soon Illuminates when you switch the
ignition on prior to engine start
to check the bulb and to indicate
whether your vehicle is ready for Inspection
and Maintenance (I/M) testing.
Normally, it illuminates until the engine is
cranked and automatically turns off if no
malfunctions are present. However, if after
15 seconds it flashes eight times, this
indicates that your vehicle is not ready for
Inspection and Maintenance (I/M) testing.
See Emission Law (page 194).
If it illuminates when the engine is running
this indicates a malfunction. The On Board
Diagnostics system has detected a
malfunction of the vehicle emission control
system.
If it flashes, engine misfire may be
occurring. Increased exhaust gas
temperatures could damage the catalytic
converter or other vehicle components.
Drive in a moderate fashion, avoid heavy
acceleration and deceleration, and have
your vehicle checked immediately.
Stability Control Illuminates when the system is
active. If it remains illuminated
or does not illuminate when you
switch the ignition on, this indicates a
malfunction. During a malfunction, the
system switches off. Have the system
checked immediately. See
Using
Stability Control (page 229). Stability Control Off Illuminates when you switch the
system off. It goes out when you
switch the system back on or
when you switch the ignition off.
See Using Stability Control (page 229).
Tailgate Ajar Illuminates when the tailgate is
not completely closed or when
opened and then closed when
the transmission is in any gear other than
park (P).
Transmission Tow/Haul
(If Equipped) Illuminates when the tow/haul
feature is activated. If the light
flashes steadily, have the system
checked immediately as damage to the
transmission could occur.
Wait To Start
(If Equipped) Illuminates when you switch the
ignition on as part of the
pre-start system. Wait until the
wait to start indicator turns off before
attempting to start your vehicle. See
Starting a Diesel Engine
(page 177).
Water In Fuel
(If Equipped) WARNING:
Do not drain the
water-in-fuel separator while the engine
is running. Failure to follow this warning
may result in fire, serious injury, death or
property damage.
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