2011 FORD SUPER DUTY engine

Selective Catalytic Reduction (SCR) System
Your vehicle is equipped with a selective catalytic reduction (SCR)
system to help reduce emission levels of oxides of nitrogen from the
exhaust of the diesel engine. The system automatically injects diesel
exhaust fluid (DEF) into the exhaust system to enable proper SCR
function.
Importance of maintaining the DEF level
In order for the SCR system to operate properly, the DEF level must be
maintained. Generally, the DEF tank should be filled during the oil
change service interval. See thescheduled maintenance informationin
this supplement for more information. However, certain conditions or
driving styles, such as trailer towing or fast rates of acceleration, will
require the refilling of the DEF tank more often.
The engine control unit will monitor the amount of fluid available in the
DEF tank. Running a system check in the message center will indicate
whether the DEF level is ok or if it is less than 1/2 full. A message will
automatically be displayed in the message center when the DEF level is
low and needs to be refilled. When you see this message you should refill
your tank. SeeMessage centerin theInstrument Clusterchapter of
yourOwner’s Guidefor message center functions. For instructions on
refilling your DEF tank, seeFilling the DEF tanklater in this section.
DEF warning messages and vehicle operations
WARNING:Diesel Exhaust Fluid (DEF) must be refilled when
low or replaced when contaminated or the vehicle speed will be
speed limited to 55 mph (89 km/h) and then 50 mph (80 km/h). In
these conditions, drive with caution and refill DEF immediately. If the
DEF becomes empty or contaminated fluid is not replaced, the vehicle
will become limited to idle speed only once stopped. In these
conditions, be cautious where you stop the vehicle because you may
not be able to drive long distances and will not be able to maintain
highway speeds until DEF is refilled or replaced.
Your vehicle’s message center will display a series of messages regarding
the amount of DEF available. A systems check will display messages
indicating the amount of DEF available (OK or under
12full) or will
produce a warning message that displays the mileage (kilometers)
remaining as the fluid in the DEF tank nears empty. For more
information on warning messages, see theMessage centersection in the
Instrument Clusterchapter of yourOwner’s Guide.
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As the DEF level nears empty, the
DEF warning symbol will be
displayed and chimes will sound
with the messages starting at
300 miles (483 km) remaining
before DEF is depleted. The
warning symbol and messages will
continue until the DEF tank is
refilled.
Continued driving without refilling will result in the following actions as
required by the U.S. Environmental Protection Agency (EPA):
•Within a certain number of miles (kilometers) to empty, speed will be
limited upon vehicle restart. Prior to this occurring a message will
appear in the message center.
•Further vehicle operation without refilling your DEF tank will cause
the engine to enter an idle-only condition. This will only occur upon
vehicle refueling and will be indicated by a message in the message
center indicating required actions to resume normal operation. It is
required to add a minimum of 0.5 gallons (1.9L) of DEF to the tank to
exit the idle-only condition, but the vehicle will still be in the speed
limiting mode until the tank is refilled.
For either vehicle speed limiting or idle-only condition, normal vehicle
operation will resume when the DEF tank is refilled.
Note:When filling the DEF tank from empty, there may be a short delay
before detecting the increased level of DEF. This must occur before full
power is returned.
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Low DEF Warnings and Actions — Instrument Cluster Messages (Optional message
center messages shown, base message center messages similar)
Distance/DEF Level
or ActionCluster MessageCustomer Requested
ActionsVehicle Actions
RestartSpeed Limited To
55 MPH (89 km/h)
Exhaust Fluid
emptyRefill exhaust fluid
On vehicle restart, speed
is limited to 55 MPH.
(89 km/h
*No action occurs until
restart.
*200 Miles (322 km)In 200 Miles
(322 km) Speed
Limited to
50 MPH (80 km/h)
Exhaust Fluid
EmptyRefill exhaust fluid
RestartSpeed Limited To
50 MPH (80 km/h)
Exhaust Fluid
EmptyRefill exhaust fluidOn vehicle restart, speed
is limited to 50 MPH
(80 km/h).
**No action taken until
vehicle is refueled
**100 Miles (161 km)Engine Idled Upon
Refuel Exhaust
Fluid EmptyRefill exhaust fluid
Diesel Tank FillEngine Idled-See
Owner’s Manual
Exhaust Fluid
EmptyRefill exhaust fluidEngine limited to idle
ONLY
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Filling the DEF tank
Your vehicle is equipped with a DEF tank with a blue-capped filler port
located next to the diesel fuel fill inlet. The tank can be filled using a
nozzle at a DEF filling station (similar to fuel fill) or using a DEF bottle
with a spout. MotorcraftDEF bottles are recommended as they are
designed to be spill proof and will stop the flow of DEF when the tank is
full. Other aftermarket bottles can be used, but they should have a seal
on the spout and an internal vent tube to achieve best fill performance
and prevent overfilling. Overfilling your DEF tank can cause damage to
the tank.
Note:Do not put DEF in the fuel tank. This can cause engine damage
not covered by your vehicle’s warranty.
Note:Immediately wipe away any DEF that has spilled on painted
surfaces with water and a damp cloth to prevent damage to the paint.
You can purchase DEF at your authorized dealer, most highway truck
stops or you can contact roadside assistance for help in finding a retailer
that sells DEF. See theCustomer Assistancechapter in theOwner’s
Guidefor more information. In addition, there is a government website
locator for DEF at the following web address that can be used to find the
nearest location to purchase DEF: http://www.afdc.energy.gov/afdc/
locator/def.
Use only DEF certified by the
American Petroleum Institute (API)
such as MotorcraftDEF or
equivalent meeting Ford specification
WSS-M99C130-A and/or ISO 22241.
Look for API certification trademark
shown here. Repairs resulting from
the use of non-certified DEF
products may not be covered by your vehicle’s warranty.
Maintaining the purity of DEF is important to avoid malfunctions in the
SCR system.
If DEF is removed from the tank for repair work, etc., the same DEF
must not be used to refill the tank as its purity is no longer guaranteed.
WARNING:Make sure that DEF does not come into contact
with eyes, skin or clothing. Should DEF contact your eyes, flush
them with plenty of water and contact a physician. Clean affected skin
with soap and water. If DEF is swallowed, drink plenty of water and
contact a physician immediately.
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To prevent overfilling of the DEF tank when filling with a bottle, Ford
recommends using MotorcraftDEF. Additionally, if the message center
indicatesEXHAUST FLUID UNDER 1/2 FULL, you should only add a
MAXIMUM of 2 gallons (6.7L) of DEF to the tank to prevent freeze
damage due to overfilling. If the message center indicatesEXHAUST
FLUID LEVEL OK, do not add DEF.
Contaminated DEF
SCR systems are sensitive to
contamination of the DEF. USE
ONLY API or ISO 22241 CERTIFIED
DIESEL EXHAUST FLUID. If the
system becomes contaminated, the
DEF light will illuminate and
contaminated exhaust fluid
messages will appear in the message
center.
Continued driving without refilling will result in the following actions as
required by the U.S. Environmental Protection Agency (EPA):
•Within a certain number of miles (kilometers) to empty, speed will be
limited upon restart. Prior to this occurring a message will appear in
the message center.
•Further vehicle operation without replacing contaminated DEF will
cause the engine to enter an idle-only condition. This will only occur
upon vehicle refueling and will be indicated by a message in the
message center indicating required actions to resume normal
operation.
For either vehicle speed limiting or idle-only condition, normal vehicle
operation will resume when the contaminated system is repaired.To
service a contaminated SCR system, see your authorized dealer.
DEF guidelines and information
•Use only DEF that carries the trademark: American Petroleum
Institute (API) certified DEF or ISO 22241.
•Do not put DEF in the diesel fuel tank.
•Do not overfill the DEF tank.
•Do not re-use the DEF container or nozzle once it is emptied.
•Avoid spilling DEF on painted surfaces, carpeting or plastic
components. Immediately wipe away any DEF that has spilled with a
damp cloth and water. If it has already crystallized, use warm water
and a sponge.
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•Store DEF out of direct sunlight and in temperatures between 23°F
(-5°C) — 68°F (20°C).
•DEF will freeze below 12°F (-11°C).
•Do not store DEF bottle in vehicle. If it leaks it could cause damage to
interior components or release an ammonia odor inside the vehicle.
•DEF is non-flammable, non-toxic, colorless and water-soluble liquid.
•Do not dilute DEF with water or any other liquid.
•An ammonia odor may be smelled when the cap is removed or during
refill. Refill DEF in a well ventilated area.
FUEL FILTER/WATER SEPARATOR
Diesel Fuel Conditioner Module (DFCM)
The vehicle is equipped with a diesel fuel conditioning module (DFCM)
located on the frame-rail under the driver-side floorboard near the
transmission
Water should be drained from the
module assembly whenever the
warning light comes on and the
message center directs you to drain
the water separator. This will occur when approximately 0.32 pints (150
ml) of water accumulates in the module. If water level is allowed to
exceed this level, the water may be passed through to the engine and
may cause fuel injection equipment damage.
Draining the DFCM
1. Stop the vehicle andshut offthe engine.
WARNING:The vehicle must be stopped with the engine off
when draining the DFCM. Fuel may ignite if the separator is
drained while the engine is running or vehicle is moving.
Note:Air will enter into the fuel system if the DFCM is drained while
the system is running. The engine will not operate properly if air enters
the system.
2. Locate the DFCM and place an appropriate container under the drain
port (see illustration).
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3. Rotate the drain counterclockwise
until the O-ring is visible. Allow the
DFCM to drain for approximately
25 seconds or until clean fuel is
observed. Rotate the drain clockwise
to tighten it.
4. Make sure that the drain valve is fully tightened, then remove the
container from under the vehicle.
Note:A loose drain valve can allow air to enter the fuel system and
cause drivetrain issues. The engine will not operate properly. be sure
that the drain valve is fully tightened.
5. Restart the engine. TheWATER IN FUEL DRAIN FILTERor
WATER IN FUEL DRAIN FILTER SEE MANUALmessage and light
should not be illuminated. If they continues to illuminate, have the fuel
system checked and repaired.
LOW FUEL PRESSURE MESSAGE
The engine is equipped with a low fuel pressure detection system. If the
message center displays:LOW FUEL PRESSUREthe following
explains why and what to do:
•Cold start or cold operation (below 32°F (0°C): If this message
appears during a cold start or during cold operation up to 10 minutes
after the initial cold start, monitor the message center. If it disappears
and does not re-appear after the engine has fully warmed up, the low
fuel pressure message is most likely caused by waxed or gelled fuel.
Do not use alcohol based additives to correct fuel gelling. This may
result in damage to the fuel injectors/systems. Use an anti-gel additive
as listed inMaintenance product specifications and capacities
section in this chapter. The customer warranty may be void from using
additives that do not meet or exceed Ford specifications.
If the low fuel pressure message persistently appears after re-fueling
during the cold start and cold operation conditions defined previously
and then disappear when the engine has fully warmed up, consider
different fuel sources.
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•Low fuel operation: If the message appears when the vehicle is warm
and during low fuel tank level operation, i.e. the tank level is at or
very near empty, refuel the vehicle and operate the vehicle. If the
message reappears after fueling, see below. If the message does not
come back, the low fuel pressure condition was due to low fuel levels
in the fuel tank.
•Normal operation: If the message appears during normal operation
when the vehicle / engine is fully warm, and fuel level is not low, the
fuel filters must be changed regardless of the maintenance schedule
interval.
•If replacement of the fuel filter does not remedy the low fuel pressure
message during normal operation as defined above, take the vehicle to
your authorized dealer.
CHANGING THE ENGINE-MOUNTED AND DFCM FUEL FILTERS
Your vehicle is equipped with two fuel filters; one is mounted on top of
the driver’s side of the engine and the second filter, inside the DFCM, is
mounted on the frame rail under the driver-side floorboard near the
transmission. Both filters should be replaced at the same time. Regular
fuel filter changes are an important part of engine maintenance; failing to
keep with the scheduled maintenance could lead to engine performance
issues and/or fuel injection system damage. Refer to thescheduled
maintenance informationof this supplement for more information.
Refer toMotorcraft part numberslater in this chapter for the fuel filter
replacement part number. This part number includes filters and seals for
both the engine-mounted and frame-mounted filters.
Removal - DFCM filter
The DFCM filter is located in the lower portion of the DFCM housing.
1. Drain the DFCM. SeeFuel filter/water separatorearlier in this
chapter.
To install the new DFCM filter, seeInstallation – DFCM filterlater in
this section.
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