Ford F-450 (2017 year). Manual — part 48

•

The usable capacity of the fuel tank is
the amount of fuel that you can add to
the fuel tank when the fuel gauge
indicates empty, before the first fuel
filler nozzle automatic shutoff event.

•

The advertised capacity is equal to the
volumetric difference between actual
fuel fill before the first fuel filler nozzle
automatic shutoff event and the fuel
quantity when the fuel gauge indicates
empty. See Capacities and
Specifications (page 411). It is the
usable capacity minus the empty
reserve.

•

Due to the empty reserve, you may be
able to add more fuel than the
advertised capacity of the fuel tank
when the fuel gauge indicates empty.

Filling the Fuel Tank

For consistent results when refueling:
•

Turn the ignition off before fueling; an
inaccurate reading results if the engine
is left running.

•

Use the same fill rate
(low-medium-high) each time the tank
is filled.

•

Allow no more than one automatic
shut-off when refueling.

Results are most accurate when the filling
method is consistent.

Calculating Fuel Economy

Do not measure fuel economy during the
first 1,000 mi (1,600 km) of driving (this is
your engine’s break-in period). A more
accurate measurement is obtained after
2,000 mi (3,200 km) to 3,000 mi
(4,800 km). Also, fuel expense, frequency
of fill ups or fuel gauge readings are not
accurate ways to measure fuel economy.

1.

Fill the fuel tank completely and record
the initial odometer reading.

2. Each time you fill the fuel tank, record

the amount of fuel added.

3. After at least three fill ups, fill the fuel

tank and record the current odometer
reading.

4. Subtract your initial odometer reading

from the current odometer reading.

To calculate L/100 km (liters per 100
kilometers) fuel consumption, multiply the
liters used by 100, then divide by kilometers
traveled. To calculate MPG (miles per
gallon) fuel consumption, divide miles
traveled by gallons used.

Keep a record for at least one month and
record the type of driving (city or highway).
This provides an accurate estimate of your
vehicle’s fuel economy under current
driving conditions. Keeping records during
summer and winter will show how
temperature impacts fuel economy.

Conditions

•

Heavily loading your vehicle reduces
fuel economy.

•

Carrying unnecessary weight in your
vehicle may reduce fuel economy.

•

Adding certain accessories to your
vehicle such as bug deflectors, rollbars
or light bars, running boards and ski
racks may reduce fuel economy.

•

Using fuel blended with alcohol may
lower fuel economy.

•

Fuel economy may decrease with lower
temperatures.

•

Fuel economy may decrease when
driving short distances.

•

You will get better fuel economy when
driving on flat terrain than when driving
on hilly terrain.

EMISSION CONTROL SYSTEM
- GASOLINE

WARNINGS

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.

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:
•

Use only the specified fuel listed.

•

Avoid running out of fuel.

•

Do not turn off the ignition while your
vehicle is moving, especially at high
speeds.

•

Have the items listed in scheduled
maintenance information performed
according to the specified schedule.

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.

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 192).

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.

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.

EMISSION CONTROL SYSTEM
- DIESEL

Oxidation Catalytic Converter and
Diesel Particulate Filter System

(If

Equipped)

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 diesel oxidation
catalytic converter or the diesel particulate
filter. The diesel oxidation catalytic
converter and the diesel particulate filter
heat up to very high temperatures after
only a short period of engine operation and
remain hot after you switch the engine off.

Your vehicle has a diesel particulate filter.
The diesel particulate filter is an inline filter
in the exhaust system that reduces carbon
emissions by trapping exhaust particles
before they reach the tailpipe. The diesel
particulate filter looks similar to a
traditional exhaust catalyst and is part of
the exhaust system under your vehicle. The
filter couples to a diesel oxidation catalyst
that reduces the amount of harmful
exhaust emitted from the tailpipe. As soot
gathers in the system, it begins to restrict
the filter. The system must periodically
clean the soot that gathers inside the filter.
This is carried out in two ways, passive
regeneration and active regeneration. Both
methods occur automatically and require
no actions from the driver. During either
one of these regeneration methods,
although you may notice a change in
exhaust tone. At certain times, the
information display shows various
messages related to the diesel particulate
filter. See Information Messages (page
128).

Diesel Particulate Filter Maintenance

You must properly maintain your vehicle's
diesel particulate filter in order for it to
function properly.

Do not disregard maintenance messages
that appear in the information display.
Failure to follow the instructions of an
information message may degrade vehicle
performance and could lead to engine
damage that may not be covered by the
vehicle Warranty.

Failure to perform active or operator
commanded 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
operator commanded regeneration. This
could result in irreversible damage to the
diesel particulate filter requiring
replacement that may not be covered by
the vehicle Warranty.

Passive Regeneration

In passive regeneration, the exhaust
system temperature and constituents
automatically clean the filter by oxidizing
the soot. Cleaning automatically occurs
during normal vehicle operating conditions
due to driving patterns.

Active Regeneration

Once the diesel particulate filter is full of
exhaust particles, the engine control
module commands the exhaust system to
clean the filter through active regeneration.
Active regeneration requires the engine
computer to raise the exhaust temperature
to eliminate the particles. During cleaning,
the particles convert to harmless gasses.
Once cleaned the diesel particulate filter
continues trapping exhaust particles.