Def Warning Messages And Vehicle Operations - Ford Diesel 2011 Supplement Manual

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
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 the Message center section in the
Instrument Cluster chapter of your Owner's Guide.
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 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 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.
2011 Diesel (eco)
Supplement, 5th Printing
USA (fus)
Maintenance and Specifications
1 ⁄ full) or will
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