Ford Diesel 2011 Supplement Manual page 35

To prevent overfilling of the DEF tank when filling with a bottle, Ford
recommends using Motorcraft DEF. Additionally, if the message center
indicates EXHAUST 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 indicates EXHAUST
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 replacing DEF will result in the following
actions as required by the California Air Resources Board (CARB) and
/or 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.
2011 Diesel (eco)
Supplement, 5th Printing
USA (fus)
Maintenance and Specifications
35