Ford Super Duty (2018 year). Manual — part 49

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.

SELECTIVE CATALYTIC
REDUCTANT SYSTEM - DIESEL

Your vehicle may have a selective catalytic
reduction system. The system helps reduce
emission levels of oxides of nitrogen from
the exhaust system. The system
automatically injects diesel exhaust fluid
into the exhaust system to enable correct
selective catalytic reduction system
function.

Note: Selective catalytic reduction systems
are not fitted to vehicles in markets where
only high-sulfur diesel fuel is available.

Diesel Exhaust Fluid Level

In order for the system to operate correctly
you must maintain the diesel exhaust fluid
level.

A warning message appears in the
information display when the diesel
exhaust fluid level is low. If a warning
message appears, refill the diesel exhaust
fluid tank as soon as possible. See
Information Messages (page 131).

Filling the Diesel Exhaust Fluid
Tank

WARNINGS

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.

WARNINGS

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.

E226045

The diesel exhaust fluid tank has a blue
filler cap. The tank is behind the left-hand
front wheel. Fill the tank using a fluid pump
at a diesel exhaust fluid filling station or a
diesel exhaust fluid container. We
recommend Motorcraft® diesel exhaust
fluid. See Capacities and Specifications
(page 428).

E163354

)

E163354

Only use diesel exhaust fluid that is
certified by the American Petroleum
Institute (API). Non-certified diesel exhaust
fluid use can cause damage not covered
by the vehicle Warranty.

Note: Do not put diesel exhaust fluid in the
fuel tank. This can cause damage not
covered by the vehicle Warranty.

You can purchase diesel exhaust fluid at
an authorized dealer, most highway truck
stops or you can contact roadside
assistance for help in finding a retailer that
sells diesel exhaust fluid. In addition, there
is a government website to help you find
the nearest location to purchase diesel
exhaust fluid:
http://www.discoverdef.com.

Filling the Diesel Exhaust Fluid Tank
Using a Fuel Station Pump

Filling the diesel exhaust fluid tank using
a nozzle is similar to fuel fill. The nozzle
shuts off automatically when the tank is
full.

Filling the Diesel Exhaust Fluid Tank
Using a Container

The following procedure applies to
Motorcraft diesel exhaust fluid or similar
fluid containers. Always follow the
manufacturer's instructions.

1.

Remove the diesel exhaust fluid
container cap. Place the spout on to
the container and tighten it until you
feel a strong resistance.

2. Remove the diesel exhaust fluid tank

filler cap.

3. Insert the spout in to the filler neck until

the seal on the spout seats on to the
filler neck. Pour the fluid in to the tank.
When the tank is full the fluid will stop
flowing automatically.

4. Return the container to the vertical

position slightly below the diesel
exhaust fluid filler neck. Allow any fluid
remaining in the spout to drain back in
to the container.

5. Remove the spout from the diesel

exhaust fluid filler neck. Replace the
diesel exhaust fluid tank cap.

6. Remove the spout from the diesel

exhaust fluid container and replace the
cap.

Note: If there is diesel exhaust fluid left in
the container retain it for later use. The
spout is re-useable. Wash the spout with
clean water prior to storage. Do not use the
diesel exhaust fluid spout with any other
fluid.

Filling the Diesel Exhaust Fluid Tank in
Cold Climates

Diesel exhaust fluid may freeze if the
ambient temperature is below 12°F (-11°C).
Your vehicle has a preheating system
which allows diesel exhaust fluid to
operate below 12°F (-11°C). If you do not
use your vehicle for an extended period
when the ambient temperature is below
12°F (-11°C), the fluid in the tank may
freeze. If the tank is overfilled and the fluid
freezes it may damage the tank. This is not
covered by the vehicle warranty.

Diesel Exhaust Fluid Warning
Messages and Vehicle Operations

WARNINGS

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.

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).

The information display shows a series of
messages about the amount of diesel
exhaust fluid available. A systems check
displays messages indicating the amount
of diesel exhaust fluid available or displays
a warning message indicating the
approximate distance remaining as the
fluid in the diesel exhaust fluid tank nears
empty. See Information Messages
(page 131).

E163176

As the diesel exhaust fluid level
nears empty, the warning
symbol displays and a series of

tones and messages starting at 500 mi
(800 km) remaining before diesel exhaust
fluid is depleted. The warning symbol and
messages continue until you refill the
diesel exhaust fluid tank.