2021 FORD F-150 engine

Failure to perform active or manual
regeneration when instructed could result
in a clogged diesel particulate filter. If the
diesel particulate filter fills beyond the
regeneration threshold, your vehicle
disables the ability for active and manual
regeneration. This could result in
irreversible damage your vehicle Warranty
may not cover.
DIESEL PARTICULATE FILTER
REQUIREMENTS
The diesel particulate filter on your vehicle
requires periodic regeneration to maintain
its correct function.
If your journeys meet one of the following
conditions:
•
You drive only short distances.
• You frequently switch the ignition on
and off.
• Your journeys contain a high level of
acceleration and deceleration.
You must carry out occasional trips with
the following conditions to assist the
regeneration process:
• Drive your vehicle in more favorable
conditions, which you will find at higher
vehicle speeds in normal driving, on a
main road or freeway for a minimum
of 20 minutes. This drive may include
short stops that will not affect the
regeneration process.
• Avoid prolonged idling and observe
speed limits and road conditions.
• Do not switch the ignition off.
• Select a suitable gear to ideally
maintain engine speed between 1500
and 3000 RPM. DIESEL PARTICULATE FILTER
MANUAL REGENERATION
WHAT IS DIESEL PARTICULATE
FILTER MANUAL REGENERATION
Diesel particulate filter manual
regeneration allows you to manually start
regeneration of the diesel particulate filter
at idle to clean the filter.
Note:
If you are not sure whether your
vehicle has this feature, contact your
authorized dealer.
DIESEL PARTICULATE FILTER
MANUAL REGENERATION
PRECAUTIONS WARNING: Stay clear of the
exhaust tailpipe during regeneration. Hot
exhaust gases can burn you badly.
You may not be able to use manual
regeneration if the service engine soon
warning lamp appears in the information
display.
Note: During the use of manual
regeneration, you may observe a light
amount of white smoke. This is normal.
DIESEL PARTICULATE FILTER
MANUAL REGENERATION
REQUIREMENTS
You can use the manual regeneration
feature when a message appears in the
information display and you are not able
to drive in a manner that allows effective
automatic active regeneration or if you
choose to manually start the regeneration
of the diesel particulate filter while the
vehicle is idle.
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(If Equipped)

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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(If Equipped)

exhaust system has had sufficient time to
cool. Depending on the amount of soot
collected by the diesel particulate filter,
ambient temperature and altitude, manual
regeneration lasts approximately 30
minutes.
DIESEL PARTICULATE FILTER
– TROUBLESHOOTING
DIESEL PARTICULATE FILTER –
WARNING LAMPS
If filter service is required, the
engine control system warning
lamp illuminates in the
information display. If there are any issues with the
diesel particulate filter system,
the engine control system
warning lamp and a service
engine soon warning lamp
illuminate to inform you that
your vehicle requires service. Have your
vehicle checked as soon as possible.
DIESEL PARTICULATE FILTER – INFORMATION MESSAGES Action
Message
Your vehicle has entered the cleaning mode. Various engineactions will raise the exhaust temperature in the Diesel
Particulate Filter system to burn off the particles (exhaust
soot). After the vehicle burns the particles off, the exhaust temperature will return to normal levels. This message is NORMAL.
Exhaust Filter Cleaning
The diesel particulate filter is full of particles (exhaust soot)
and you are not operating the vehicle in a manner that allows normal cleaning. Drive the vehicle above 30 mph (48 km/h)
until the message turns off.
Exhaust Filter Over-
loaded Drive to Clean
Exhaust Filter Over-loaded Clean Now
The diesel particulate filter is full of particles (exhaust soot)
and you are not operating the vehicle in a manner that allows normal cleaning. Drive the vehicle above
30 mph (48 km/h)
until the message turns off.
Exhaust Filter at Limit
Clean Now
Exhaust Filter at Limit Drive to Clean Now
Your diesel particulate filter is clean.
Exhaust Filter Drive
Complete
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(If Equipped)

WHAT IS THE SELECTIVE
CATALYTIC REDUCTION
SYSTEM
The selective catalytic reduction system
helps reduce emission levels of oxides of
nitrogen from the exhaust system.
HOW DOES THE SELECTIVE
CATALYTIC REDUCTION
SYSTEM WORK
The selective catalytic reduction system
injects diesel exhaust fluid into the exhaust
system to enable correct selective catalytic
reduction system function.
SELECTIVE CATALYTIC
REDUCTION SYSTEM
PRECAUTIONS
WARNING: Keep diesel exhaust
fluid out of reach of children. Avoid
contact with skin, eyes or clothing. In
case of contact with your eyes, flush
immediately with water and get prompt
medical attention. In case of contact
with your skin, clean immediately with
soap and water. If you swallow any
diesel exhaust fluid, drink plenty of
water, call a physician immediately. WARNING:
Only refill the diesel
exhaust fluid tank in a well ventilated
area. When you remove the diesel
exhaust fluid tank filler cap or a diesel
exhaust fluid container cap, ammonia
vapors may escape. Ammonia vapors
can be irritating to skin, eyes and mucous
membranes. Inhaling ammonia vapors
can cause burning to the eyes, throat and
nose and cause coughing and watery
eyes. WARNING:
Diesel exhaust fluid
must be refilled when low or replaced
when contaminated or your vehicle
speed becomes limited to
50 mph
(80 km/h). In these conditions, drive with
caution and refill diesel exhaust fluid
immediately. If the diesel exhaust fluid
becomes empty or contaminated and
fluid is not replaced, your vehicle
becomes limited to engine idle only once
stopped. In these conditions, be cautious
where you stop your vehicle because you
may not be able to drive long distances
or maintain highway speeds until you
refill or replace the diesel exhaust fluid. WARNING:
Tampering with or
disabling the selective catalytic
reduction system results in severe
vehicle performance limitation including
eventual speed limiting to
5 mph
(8 km/h).
Note: Do not put diesel exhaust fluid in the
fuel tank. This can cause damage that your
vehicle Warranty may not cover.
Selective catalytic reduction systems are
sensitive to contamination of the diesel
exhaust fluid. Maintaining the purity of the
fluid is important to avoid system
malfunctions. If you remove or drain the
diesel exhaust fluid tank, do not use the
same fluid to refill the tank. The system
has a sensor to monitor fluid quality.
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(If Equipped)

Driving without refilling, replacing
contaminated diesel exhaust fluid, or
having the selective catalytic reduction
system repaired results in the following
actions as required by the California Air
Resources Board (CARB) and the U.S.
Environmental Protection Agency (EPA):
•
Within a preset distance to empty,
speed is limited upon vehicle restart.
Prior to this occurring a message
appears in the information display.
• Further vehicle operation without
refilling or replacing contaminated
diesel exhaust fluid causes the engine
to enter an idle-only condition. This
only occurs upon vehicle refueling,
vehicle idling in park for 1 hour, or
engine shutdown for 10 minutes or
more and is indicated by a message in
the information display indicating
required actions to resume normal
operation. It is required to add a
minimum of 1.0 gal (3.8 L) of diesel
exhaust fluid to the tank to exit the
idle-only condition, but your vehicle is
still in the speed-limiting mode until
you refill the tank completely.
Note: For vehicle speed limiting or idle-only
condition, normal vehicle operation resumes
when you refill the diesel exhaust fluid tank
or repair the contaminated system. If the
system is contaminated or inoperative, have
your vehicle checked as soon as possible. SELECTIVE CATALYTIC
REDUCTION SYSTEM
REQUIREMENTS Only use diesel exhaust fluid that is
certified by the American Petroleum
Institute (API).
You can purchase diesel exhaust fluid at
an authorized dealer, or contact roadside
assistance for help in finding a retailer that
sells diesel exhaust fluid.
Note:
Non-certified diesel exhaust fluid use
can cause damage that your Warranty may
not cover
SELECTIVE CATALYTIC
REDUCTION SYSTEM
GUIDELINES
• Diesel exhaust fluid is non-flammable,
non-toxic, colorless and water-soluble
liquid.
• In order for the system to operate
correctly you must maintain the diesel
exhaust fluid level.
• Do not overfill the diesel exhaust fluid
tank.
• Diesel exhaust fluid is corrosive.
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(If Equipped)E163354

Action
Message
The diesel exhaust fluid is empty. You must replenish thediesel exhaust fluid to resume normal operation of your
vehicle. See Diesel Exhaust Fluid Capacity and Specific- ation (page 277).
DEF Level Low Speed
Limited to XX MPH/km/ h
The selective catalytic reduction system detects low exhaustfluid. The engine will eventually enter into an idle only mode.
You must replenish the diesel exhaust fluid to resume normal operation of your vehicle. See
Diesel Exhaust Fluid Capa-
city and Specification (page 277).
DEF Level Empty Engine
Idled Soon
The vehicle will enter into an idle only mode. You must
replenish the diesel exhaust fluid to resume normal operation of your vehicle. See
Diesel Exhaust Fluid Capacity and
Specification (page 277).
DEF Level Empty Engine
Idled See Manual
The selective catalytic reduction system detects a fault. Thevehicle ’s top speed will become limited in the displayed
distance and count down from this point. Have your vehicle checked as soon as possible.
DEF Fault Speed Limited
to XX MPH/km/h in XX mi/km
The selective catalytic reduction system detects a fault. The
vehicle ’s top speed will become limited upon restarting. Have
your vehicle checked as soon as possible.
DEF Fault Speed Limited
to XX MPH/km/h Upon Restart
The selective catalytic reduction system detects a fault. Thevehicle ’s top speed is limited. Have your vehicle checked as
soon as possible.
DEF Fault Speed Limited
to XX MPH/km/h
The selective catalytic reduction system detects a fault. The
engine will eventually enter into an idle only mode. Have your vehicle checked as soon as possible.
DEF Fault Engine Idled
Soon
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(If Equipped)

WHAT IS THE CATALYTIC
CONVERTER
The catalytic converter is part of your
vehicle's emissions system and filters
harmful pollutants from the exhaust gas.
CATALYTIC CONVERTER
PRECAUTIONS
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.
To avoid damaging the catalytic converter:
• 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 486). •
Use the correct fuel.
See Fuel and
Refueling (page 255).
• 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: Do not make any unauthorized
changes to your vehicle or engine. By law,
vehicle owners and anyone who
manufactures, repairs, or services a fleet of
vehicles are not permitted to intentionally
remove an emission control device or
prevent it from working.
CATALYTIC CONVERTER –
TROUBLESHOOTING
CATALYTIC CONVERTER –
WARNING LAMPS
Your vehicle has an on-board diagnostics
system that monitors the emission control
system. If any of the following warning
lamps illuminate, this may indicate that
the on-board diagnostics system has
detected an emission control system
malfunction. Continuing to drive your vehicle may cause
reduced power or the engine to stop.
Failure to respond to a warning lamp may
cause damage that your vehicle Warranty
may not cover. Have your vehicle checked
as soon as possible.
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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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