2023 FORD F650/750 service

Battery and Charging System
Action Message
The charging system requires service. If the
warning stays on or continues to come on,
have the system checked as soon as
possible. Check Charging System
The battery management system detects
an extended low-voltage condition. Your
vehicle will disable various features to help
preserve the battery. Turn off as many of
the electrical loads as soon as possible to
help improve system voltage. If the system
voltage has recovered, the disabled
features will operate again as normal. Low Battery Features Temporarily Turned
Off
The battery management system determ-
ines that the battery is at a low state of
charge. Turn your ignition off as soon as
possible to protect the battery. This
message will clear once you restart your
vehicle and the battery state of charge has
recovered. Turning off unnecessary elec-
trical loads will allow faster battery state-
of-charge recovery. Turn Power Off To Save Battery
Diesel Messages
WARNING: When the Exhaust
Filter Cleaning message appears in the
information display, do not park near
flammable materials, vapors or
structures until filter cleaning is
complete.
76
Information Displays

Action Message
The diesel exhaust fluid is nearing empty.
Your vehicle's top speed will become
limited in the displayed distance. You must
replenish the diesel exhaust fluid to resume
normal operation of your vehicle. See
Selective Catalytic Reductant System
(page 118). DEF Level Empty Speed Limited to avg
speed imperial:#0 MPH in distance
imperial:###0 mi
DEF Level Empty Speed Limited to avg
speed metric:#0 km/h in distance
metric:###0 km
The remaining diesel exhaust fluid has
depleted. Upon restart, your vehicle speed
is now limited. You must replenish the
diesel exhaust fluid to resume normal
operation of your vehicle. See Selective
Catalytic Reductant System (page 118). DEF Level Empty Speed Limited to avg
speed imperial:#0 MPH Upon Restart
DEF Level Empty Speed Limited to avg
speed metric:#0 km/h Upon Restart
The diesel exhaust fluid is empty. You must
replenish the diesel exhaust fluid to resume
normal operation of your vehicle. See
Selective Catalytic Reductant System
(page 118). DEF Level Empty Speed Limited to avg
speed imperial:#0 MPH
DEF Level Empty Speed Limited to avg
speed metric:#0 km/h
The selective catalytic reduction system
detects low exhaust fluid. The engine will
eventually enter into an idle only mode. You
must replenish diesel exhaust fluid to
resume normal operation of your vehicle.
See Selective Catalytic Reductant
System (page 118). DEF Level Empty Engine Idled Soon
The selective catalytic reduction requires
service and is causing your vehicle to enter
an idle-only mode. If the exhaust fluid is
empty, you must replenish the diesel
exhaust fluid to resume normal operation
of your vehicle. See Selective Catalytic
Reductant System (page 118). DEF Level Empty Engine Idled See Manual
The selective catalytic reduction system
requires service. The system displays your
vehicle's top speed limit and distance
before limitation. Have the system checked
as soon as possible. DEF Fault Speed Limited to avg speed
imperial:#0 MPH in distance imperial:###0
mi
DEF Fault Speed Limited to avg speed
metric:#0 km/h in distance metric:###0
km
78
Information Displays

Action Message
The selective catalytic reduction system
requires service. Upon restart, your vehicle
speed is now limited. Have the system
checked as soon as possible. DEF Fault Speed Limited to avg speed
imperial:#0 MPH Upon Restart
DEF Fault Speed Limited to avg speed
metric:#0 km/h Upon Restart
The selective catalytic reduction system
requires service. The system displays your
vehicle's top speed limit. Have the system
checked as soon as possible. DEF Fault Speed Limited to avg speed
imperial:#0 MPH
DEF Fault Speed Limited to avg speed
metric:#0 km/h
Have your vehicle checked as soon as
possible. Ignoring this warning message
could lead to reduced drivability and
customer expense, including damage to
the diesel particulate filter. Your new
vehicle warranty may not cover this
damage. Exhaust Filter Over Limit Service Now
The water separator has reached a prede-
termined capacity and needs draining. See
Draining the Fuel Filter Water Trap
(page 232). Water in Fuel Drain Filter
A low fuel pressure condition has occurred
due to cold, low fuel level or fuel filters need
to be changed. See Fuel Quality (page
106). Fuel Pressure Low
Doors and Locks
Action Message
The driver door is not completely closed.
Close the driver door. If the message
continues to display, have the system
checked as soon as possible. Driver Door Ajar
The passenger door is not completely
closed. Close the passenger door. If the
message continues to display, have the
system checked as soon as possible. Passenger Door Ajar
79
Information Displays

Driver Alert
Action Message
Stop and rest as soon as it is safe to do so. Driver Alert Warning Rest Now
Take a rest soon. Driver Alert Warning Rest Suggested
Drivetrain
Action Message
The electronic locking differential requires
service. Have the system checked as soon
as possible. Check Locking Differential
Engine
Action Message
The engine has reduced power to help
reduce high engine temperature. Have the
system checked as soon as possible. Power Reduced to Lower Engine Temp
Fuel
Action Message
An early reminder of a low fuel condition.
Refuel your vehicle. Fuel Level Low
A fuel fill inlet may not be properly closed. Check Fuel Fill Inlet
80
Information Displays

Lane Departure Warning System
Action Message
The system has detected a condition that
has caused the system to be temporarily
unavailable. If the message continues to
display, have the system checked as soon
as possible. Front Camera Temporarily Not Available
The system has detected a condition that
requires you to clean the windshield in order
for it to operate properly. Front Camera Low Visibility Clean Screen
The system requires service, have the
system checked as soon as possible. Front Camera Malfunction Service Required
The system requests you to keep your
hands on the steering wheel. Keep Hands on Steering Wheel
Maintenance
Action Message
Stop your vehicle as soon as safely possible
and turn off the engine. Check the oil level,
if the warning stays on or continues to come
on with your engine running, have your
vehicle checked as soon as possible. Low Engine Oil Pressure
The engine oil life is low and needs to be
changed soon. Change Engine Oil Soon
The engine oil life is low and needs to be
changed immediately. Oil Change Required
The brake fluid level is low, have the system
checked as soon as possible. Brake Fluid Level Low
The brake system requires service. Stop
your vehicle in a safe place. Have the
system checked as soon as possible. Check Brake System
Your vehicle is still in transport or factory
mode. This may not allow some features
to operate properly. Have your vehicle
checked as soon as possible. Factory Mode Contact Dealer
Transport Mode Contact Dealer
The powertrain requires service. See Manual
81
Information Displays

Power Steering
Action Message
The power steering system requires service.
Have the system checked as soon as
possible. Steering Fault Service Now
The power steering system is not working.
Stop your vehicle in a safe place. Have the
system checked as soon as possible. Steering Loss Stop Safely
The power steering system, passive entry
or passive entry start system requires
service. Have the system checked as soon
as possible. Steering Assist Fault Service Required
The steering lock system requires service.
Have the system checked as soon as
possible. Steering Lock Malfunction Service Now
Pre-Collision Assist
Action Message
The system requires service. Have the
system checked as soon as possible. Pre-Collision Assist Not Available
You have a blocked sensor due to
inclement weather, ice, mud or water in
front of the radar sensor. You can typically
clean the sensor to resolve. If the message
continues to appear, have the system
checked as soon as possible. Pre-Collision Assist Not Available Sensor
Blocked
Traction Control
Action Message
The status of the traction control system
after you switched it on. See Using Trac-
tion Control (page 149). Traction Control On
The status of the traction control system
after you switched it off. See Using Trac-
tion Control (page 149). Traction Control Off
82
Information Displays

Transmission
Action Message
You switched the engine off and the shift
selector is in any position other than park
(P). Shift to Park
Displays when the brake pedal needs to be
pressed. Press Brake Pedal
The transmission is overheating and needs
to cool. Stop in a safe place as soon as
possible. Transmission Over Temperature Stop
Safely
Have the system checked as soon as
possible. Transmission Service Required
The transmission is overheating and needs
to cool. Stop in a safe place as soon as
possible. Transmission Too Hot Press Brake
The transmission has limited functionality.
Have the system checked as soon as
possible. Transmission Limited Function See Manual
A reminder to shift into park (P). In addi-
tion, this message is typical after recon-
necting or recharging the battery until you
cycle the ignition to the on mode. See
Changing the 12V Battery (page 246). Transmission Not in Park
Have the system checked as soon as
possible. Transmission Fault Service Now
Displays when the transmission has
adjusted the shift strategy. Transmission Adjusted
Displays when the transmission is adjusting
the shift strategy. Transmission AdaptMode
Transmission is too cold. Wait for it to warm
up before you drive. Transmission Warming Up Please Wait
83
Information Displays

Note:Do not blend used engine oil with
diesel fuel under any circumstances.
Blending used oil with the fuel will
significantly increase your vehicle’s exhaust
emissions and reduce engine life due to
increased internal wear.
Using low sulfur diesel fuel
(16-500 ppm) or high sulfur
diesel fuel (greater than 500
ppm) in your diesel engine will cause
certain emission components to
malfunction which may also cause the
service engine soon light to illuminate
indicating an emissions-related concern.
Diesel fuel is adjusted seasonally for cold
temperature. For best results at
temperatures below 19°F (-7°C), it is
recommended to use a diesel fuel which
has been seasonally adjusted for the
ambient conditions.
Fuel Requirements - Choosing The
Right Fuel: Vehicles Operated
Where Ultra Low Sulfur Diesel Fuel
Is Not Required
For the engine to operate reliably on
low-sulfur or high-sulfur diesel fuel, the
engine must be a factory built high-sulfur
engine (available as a dealer order option
for select markets) or an ultra low sulfur
diesel fuel configured engine that has been
retrofitted for high-sulfur diesel fuel using
Ford Motor Company dealer service parts.
Failure to use retrofit components other
than those available through your
authorized dealer will result in coolant
system damage, engine overheating,
selective catalyst reduction system or
diesel particulate filter damage and
possible base engine damage.Use only a diesel engine configured for use
with high sulfur diesel fuel in markets with
diesel fuel that has sulfur content greater
than 15 ppm. Using low sulfur diesel fuel
(16–500 ppm) or high sulfur diesel fuel
(greater than 500 ppm) in a diesel engine
designed to use only Ultra Low Sulfur
Diesel fuel may result in damage to engine
emission control devices and the
aftertreatment system, potentially
rendering the vehicle inoperable.
Vehicles with engines configured for use
with high sulfur diesel fuel are only
available for sale in countries where ultra
low sulfur diesel fuel is generally not
available or mandated by the government.
Vehicles originally sold in a ultra low sulfur
diesel fuel market that are subsequently
exported to non- ultra low sulfur diesel fuel
markets will need to be retrofitted (at the
customer’s expense using Ford authorized
dealer service parts) in order to be reliably
operated on non- ultra low sulfur diesel
fuel.
Biodiesel
WARNING: Do not mix diesel with
gasoline, gasohol or alcohol. This could
cause an explosion.
Note:Do not use home heating oil,
agricultural fuel, raw fats and oils, waste
cooking greases, biodiesel fuels greater than
20% or any diesel fuel not intended for
highway use. Red dye is used to identify
fuels intended for agricultural and
non-highway use. Damage to the fuel
injection system, engine and exhaust
catalyst can occur if an improper fuel is
used.
You may operate your vehicle on diesel
fuels containing up to 20% biodiesel, also
known as B20.
107
Fuel and Refueling