2021 FORD MUSTANG ignition

•
Press the brake pedal (automatic
transmission) or clutch pedal (manual
transmission), and then press the
button for any length of time. An
indicator light on the button illuminates
when the ignition is on and when the
engine starts.
STEERING WHEEL LOCK
Your vehicle has an electronically
controlled steering wheel lock that
automatically operates.
The steering wheel will lock shortly after
you have parked your vehicle and the
passive key is outside it or when you lock
your vehicle.
Note: The steering wheel will not lock when
the ignition is on or when your vehicle is
moving.
Unlocking the Steering Wheel
The steering wheel unlocks when the
system detects a valid passive key inside
your vehicle. If the steering wheel relocks,
switch the ignition on to unlock it.
Note: You may have to slightly rotate the
steering wheel to assist unlocking it.
STARTING A GASOLINE
ENGINE
When you start the engine, the idle speed
increases, this helps to warm up the
engine. If the engine idle speed does not
slow down automatically, have your
vehicle checked by an authorized dealer. Note:
You can crank the engine for a total
of 60 seconds (without the engine starting)
before the starting system temporarily
disables. The 60 seconds does not have to
be all at once. For example, if you crank the
engine three times for 20 seconds each
time, without the engine starting, you
reached the 60-second time limit. A
message appears in the information display
alerting you that you exceeded the cranking
time. You cannot attempt to start the engine
for at least 15 minutes. After 15 minutes, you
are limited to a 15-second engine cranking
time. You need to wait 60 minutes before
you can crank the engine for 60 seconds
again.
Before starting the engine, check the
following:
• Make sure all occupants have fastened
their seatbelts.
• Make sure the headlamps and
electrical accessories are off.
• Make sure the parking brake is on.
• Move the transmission selector lever
to park (P) (automatic transmission)
or neutral (manual transmission)
Note: Do not touch the accelerator pedal.
Note: You must have your intelligent access
key in the vehicle in order to shift the
transmission out of position P.
1. Fully press the brake pedal.
2. Press the button.
The system does not function if:
• The key frequencies are jammed.
• The key battery has no charge.
If you are unable to start the engine, do the
following:
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Starting and Stopping the Engine

1. Remove the rubber covering (A) in the
cupholder.
2. Place the remote in the backup slot (B)
with the buttons facing up and the
keyring toward the front of the vehicle.
3. With the key in this position, press the brake pedal (automatic transmission)
or clutch pedal (manual transmission),
then the START button to switch the
ignition on and start your vehicle.
Fast Restart
The fast restart feature allows you to
restart the engine within 20 seconds of
switching it off, even if a valid key is not
present.
Within 20 seconds of switching the engine
off, press the brake pedal (automatic
transmission) or clutch pedal (manual
transmission) and press the button. After
20 seconds have expired, you can no
longer restart the engine without the key
present inside your vehicle.
Once the engine has started, it remains
running until you press the button, even if
the system does not detect a valid key. If
you open and close a door while the engine
is running, the system searches for a valid
key. You cannot restart the engine if the
system does not detect a valid key within
20 seconds. Failure to Start
If you cannot start the engine after three
attempts, wait 10 seconds and follow this
procedure:
1. If your vehicle is equipped with an
automatic transmission, fully press the
brake pedal. If your vehicle is equipped
with a manual transmission, fully press
the clutch pedal and apply the
handbrake.
2. Move the transmission selector lever to park (P) (automatic transmission)
or neutral (manual transmission).
3. Fully press the accelerator pedal and hold it there.
4. Start the engine.
Automatic Engine Shutdown
Your vehicle is equipped with a feature that
automatically shuts down the engine if it
has been idling for an extended period. The
ignition also turns off in order to save
battery power. Before the engine shuts
down, a message appears in the
information display showing a timer
counting down from 30 seconds. If you do
not intervene within 30 seconds, the engine
shuts down. Another message appears in
the information display to inform you that
the engine has shut down in order to save
fuel. Start your vehicle as you normally do.
Automatic Engine Shutdown Override
Note: You cannot permanently switch off
the automatic engine shutdown feature.
When you switch it off temporarily, it turns
on at the next ignition cycle.
You can stop the engine shutdown, or reset
the timer, at any point before the
30-second countdown has expired by
doing any of the following:
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Starting and Stopping the EngineE174956

•
You can reset the timer by interacting
with your vehicle (such as pressing the
brake pedal or accelerator pedal).
• You can temporarily switch off the
shutdown feature any time the ignition
is on (for the current ignition cycle
only). Use the information display to
do so. See Information Displays
(page 99).
• During the countdown before engine
shutdown, you are prompted to press
OK or RESET (depending on your type
of information display) to temporarily
switch the feature off (for the current
ignition cycle only).
Stopping the Engine When Your
Vehicle is Stationary
1. Move the transmission selector lever to park (P) (automatic transmission)
or neutral (manual transmission).
2. Press the button once.
3. Apply the parking brake.
Note: This switches off the ignition, all
electrical circuits, warning lamps and
indicators.
Note: If the engine is idling for 30 minutes,
the ignition and engine automatically shut
down.
Stopping the Engine When Your
Vehicle is Moving WARNING:
Switching off the
engine when the vehicle is still moving
will result in a loss of brake and steering
assistance. The steering will not lock, but
higher effort will be required. When the
ignition is switched off, some electrical
circuits, including air bags, warning lamps
and indicators may also be off. If the
ignition was turned off accidentally, you
can shift into neutral (N) and re-start the
engine. 1. Move the transmission selector lever
to the neutral position and use the
brakes to bring your vehicle to a safe
stop.
2. When your vehicle has stopped, move the transmission selector lever to park
(P) (automatic transmission) or
neutral (manual transmission).
3. Press and hold the button for one second, or press it three times within
two seconds.
4. Apply the parking brake.
Guarding Against Exhaust Fumes WARNING:
If you smell exhaust
fumes inside your vehicle, have your
vehicle checked by your authorized
dealer immediately. Do not drive your
vehicle if you smell exhaust fumes.
Carbon monoxide is present in exhaust
fumes. Take precautions to avoid its
dangerous effects.
Important Ventilating Information
If you stop your vehicle and the leave the
engine idling for long periods, we
recommend that you do one of the
following:
• Open the windows at least
1 in
(2.5 cm).
• Set your climate control to outside air.
ENGINE BLOCK HEATER
(IF
EQUIPPED) WARNING:
Failure to follow engine
block heater instructions could result in
property damage or serious personal
injury.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Starting and Stopping the Engine

We recommend Top Tier detergent
gasolines, where available to help minimize
engine deposits and maintain optimal
vehicle and engine performance. For
additional information, refer to
www.toptiergas.com.
Note:
Use of any fuel for which the vehicle
was not designed can impair the emission
control system, cause loss of vehicle
performance, and cause damage to the
engine which may not be covered by the
vehicle Warranty.
Do not use:
• Diesel fuel.
• Fuels containing kerosene or paraffin.
• Fuel containing more than 15% ethanol
or E85 fuel.
• Fuels containing methanol.
• Fuels containing metallic-based
additives, including manganese-based
compounds.
• Fuels containing the octane booster
additive, methylcyclopentadienyl
manganese tricarbonyl (MMT).
• Leaded fuel, using leaded fuel is
prohibited by law.
The use of fuels with metallic compounds
such as methylcyclopentadienyl
manganese tricarbonyl (commonly known
as MMT), which is a manganese-based
fuel additive, will impair engine
performance and affect the emission
control system.
FUEL FILLER FUNNEL
LOCATION
The fuel filler funnel is under the luggage
compartment floor covering. RUNNING OUT OF FUEL
Running out of fuel can cause damage not
covered by the vehicle Warranty.
If your vehicle runs out of fuel:
•
Add a minimum of 1.3 gal (5 L) of fuel
to restart the engine.
• You may need to switch the ignition
from off to on several times after
refueling to allow the fuel system to
pump the fuel from the tank to the
engine. When restarting, cranking time
takes a few seconds longer than
normal.
Note: If your vehicle is on a steep slope,
more fuel may be required.
Filling a Portable Fuel Container WARNING:
Flow of fuel through a
fuel pump nozzle can produce static
electricity. This can cause a fire if you are
filling an ungrounded fuel container.
Use the following guidelines to avoid
electrostatic charge build-up, which can
produce a spark, when filling an
ungrounded fuel container:
• Only use an approved fuel container to
transfer fuel to your vehicle. Place the
container on the ground when filling it.
• Do not fill a fuel container when it is
inside your vehicle (including the cargo
area).
• Keep the fuel pump nozzle in contact
with the fuel container when filling it.
• Do not use a device that holds the fuel
pump nozzle lever in the fill position.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Fuel and Refueling

Filling the Fuel Tank
For consistent results when refueling:
•
Switch the ignition off before fueling,
an inaccurate reading results if you
leave the engine running.
• Use the same fill rate,
low-medium-high, each time you fill
the tank.
• Allow no more than one automatic
shut-off when refueling.
Results are most accurate when the filling
method is consistent.
Calculating Fuel Economy
Your vehicle calculates fuel economy
figures through the trip computer average
fuel function. See Information Displays
(page 99).
The first
1,000 mi (1,600 km) of driving is
the break-in period of the engine. The
system obtains a more accurate
measurement after
2,000– 3,000 mi
(3,200–4,800 km).
Keep a record for at least one month and
record the type of driving, for example city
or highway. This provides an accurate
estimate of your vehicle ’s fuel economy
under current driving conditions. Keeping
records during summer and winter shows
how temperature impacts fuel economy.
Conditions Affecting Fuel Efficiency
• Carrying unnecessary weight in your
vehicle may reduce fuel economy.
• Avoid adding accessories that increase
aerodynamic drag to your vehicle such
as bug deflectors, car top carriers and
ski or bike racks.
• Remove empty roof racks and keep
windows shut at high speeds to reduce
wind resistance and fuel use. •
Check and adjust tire pressure
regularly. Underinflated tires increases
fuel consumption.
• Sudden acceleration and braking
degrade fuel efficiency. Drive smoothly
looking as far ahead as possible and
avoid short trips when possible.
• Fuel efficiency degrades with lower
temperatures.
• Comfort features use additional energy
and consume more fuel. Use AC and
other comfort features only when
necessary.
• Using fuel blended with alcohol may
increase fuel consumption.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Fuel and Refueling

CATALYTIC CONVERTER
WARNING: Do not park, idle or
drive your vehicle on dry grass or other
dry ground cover. The emission system
heats up the engine compartment and
exhaust system, creating the risk of fire. WARNING:
The normal operating
temperature of the exhaust system is
very high. Never work around or attempt
to repair any part of the exhaust system
until it has cooled. Use special care when
working around the catalytic converter.
The catalytic converter heats up to a very
high temperature after only a short
period of engine operation and stays hot
after the engine is switched off. WARNING:
Exhaust leaks may
result in entry of harmful and potentially
lethal fumes into the passenger
compartment. If you smell exhaust
fumes inside your vehicle, have your
vehicle inspected immediately. Do not
drive if you smell exhaust fumes.
Your vehicle has various emission control
components and a catalytic converter that
enables it to comply with applicable
exhaust emission standards.
To make sure that the catalytic converter
and other emission control components
continue to work properly:
• Do not crank the engine for more than
10 seconds at a time.
• Do not run the engine with a spark plug
lead disconnected.
• Do not push-start or tow-start your
vehicle. Use booster cables. See Jump
Starting the Vehicle
(page 234).
• Use only the specified fuel listed.
• Do not switch the ignition off when your
vehicle is moving. •
Avoid running out of fuel.
• Have the items listed in scheduled
maintenance information performed
according to the specified schedule.
Note: Resulting component damage may
not be covered by the vehicle Warranty.
The scheduled maintenance items listed
in scheduled maintenance information are
essential to the life and performance of
your vehicle and to its emissions system.
If you use anything other than Ford,
Motorcraft or Ford-authorized parts 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.
Illumination of the service engine soon
indicator, 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.
An improperly operating or damaged
exhaust system may allow exhaust to
enter the vehicle. Have a damaged or
improperly operating exhaust system
inspected and repaired immediately.
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
also lists engine displacement.
Please consult your warranty information
for complete details.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Engine Emission Control

On-Board Diagnostics (OBD-II)
Your vehicle has a computer known as the
on-board diagnostics system (OBD-II) that
monitors the engine
’s emission control
system. The system protects the
environment by making sure that your
vehicle continues to meet government
emission standards. The OBD-II system
also assists a service technician in properly
servicing your vehicle. When the service engine soon
indicator illuminates, the OBD-II
system has detected a
malfunction. Temporary malfunctions may
cause the service engine soon indicator to
illuminate. Examples are:
1. Your vehicle has run out of fuel —the
engine may misfire or run poorly.
2. Poor fuel quality or water in the fuel —the engine may misfire or run
poorly.
3. The fuel fill inlet may not have closed properly. See Refueling (page 156).
4. Driving through deep water —the
electrical system may be wet.
You can correct these temporary
malfunctions by filling the fuel tank with
good quality fuel, properly closing the fuel
fill inlet or letting the electrical system dry
out. After three driving cycles without these
or any other temporary malfunctions
present, the service engine soon indicator
should stay off the next time you start the
engine. A driving cycle consists of a cold
engine startup followed by mixed city and
highway driving. No additional vehicle
service is required. If the service engine soon indicator remains
on, have your vehicle serviced at the first
available opportunity. Although some
malfunctions detected by the OBD-II may
not have symptoms that are apparent,
continued driving with the service engine
soon indicator on can result in increased
emissions, lower fuel economy, reduced
engine and transmission smoothness and
lead to more costly repairs.
Readiness for Inspection and
Maintenance (I/M) Testing
Some state and provincial and local
governments may have
Inspection/Maintenance (I/M) programs
to inspect the emission control equipment
on your vehicle. Failure to pass this
inspection could prevent you from getting
a vehicle registration.
If the service engine soon
indicator is on or the bulb does
not work, your vehicle may need
service. See On-Board Diagnostics.
Your vehicle may not pass the I/M test if
the service engine soon indicator is on or
not working properly (bulb is burned out),
or if the OBD-II system has determined
that some of the emission control systems
have not been properly checked. In this
case, the vehicle is not ready for I/M
testing.
If the vehicle ’s engine or transmission has
just been serviced, or the battery has
recently run down or been replaced, the
OBD-II system may indicate that the
vehicle is not ready for I/M testing. To
determine if the vehicle is ready for I/M
testing, turn the ignition key to the on
position for 15 seconds without cranking
the engine. If the service engine soon
indicator blinks eight times, it means that
the vehicle is not ready for I/M testing; if
the service engine soon indicator stays on
solid, it means that your vehicle is ready
for I/M testing.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Engine Emission Control

The OBD-II system checks the emission
control system during normal driving. A
complete check may take several days.
If the vehicle is not ready for I/M testing,
you can perform the following driving cycle
consisting of mixed city and highway
driving:
1. 15 minutes of steady driving on an
expressway or highway followed by 20
minutes of stop-and-go driving with at
least four 30-second idle periods.
2. Allow your vehicle to sit for at least eight hours with the ignition off. Then,
start the vehicle and complete the
above driving cycle. The vehicle must
warm up to its normal operating
temperature. Once started, do not turn
off the vehicle until the above driving
cycle is complete.
If the vehicle is still not ready for I/M
testing, you need to repeat the above
driving cycle.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Engine Emission Control