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GETTING TO KNOW YOUR INSTRUMENT PANEL 111
may be limited to 1,000 RPM for up to approxi-
mately two minutes under more severe cold
con
ditions.
Coolant Low — This telltale will turn on to indi-
cate the vehicle coolant level is low
Ú page 366.
DIESEL EXHAUST FLUID (DEF)
W
ARNING MESSAGES
There are four different messages which are
displayed if the vehicle detects that the DEF
system has been filled with a fluid other than DEF,
has experienced component failures, or when
tampering has been detected. The vehicle may be
limited to a maximum speed of 5
mph (8 km/h) if
th
e DEF system is not serviced within less than
200
miles (322 km) of the fault being detected.
When the DEF system needs to be serviced the
fol
lowing warnings will display:
DEF Low Refill Soon
— This message will display
when the low level is reached, during vehicle
start up, and with increased frequency during
vehicle operation. It will be accompanied by a
single chime. Approximately 5 gallons (19 Liters)
of DEF is required to refill the tank when this
message is initially displayed. on pickup applica
-
tions, and approximately 7 gallons (26 Liters) are
re
quired on chassis-cab applications.
Speed Limited to 5 MPH in XXX mi Refill DEF —
This message will continuously display if the
“DEF Low Refill Soon” message is ignored, and
the frequency of occurrence of the chime will
increase unless up to 2 gallons (7.5 Liters) of
DEF is added to the tank.
5 MPH Max Speed on Restart, Long Idle or
Refuel Refill DEF — This message will continu
-
ously display when the counter reaches zero,
and will be accompanied by a periodic chime.
The vehicle will only be capable of a maximum
speed of 5 mph upon the first of the following
con
ditions to occur:
If the vehicle is shutoff and restarted.
If the vehicle is idled for an extended period
of time, approximately one hour or greater.
If the system detects that the level of fuel in
the tank has increased.
Add a minimum of 2 gallons (7.5 Liters) of DEF
to the tank in order to avoid vehicle operation at
a maximum speed of 5
mph (8 km/h).
NOTE:
A minimum of 2 gallons (7.5 Liters) may be
re
quired to restore normal vehicle operation.
Although the vehicle will start normally and can be
placed in gear after this message has been initially
displayed, extreme caution should be utilized since
the vehicle will only be capable of maneuvering at
a maximum speed of 5
mph (8 km/h).
DIESEL EXHAUST FLUID (DEF) FAULT
W
ARNING MESSAGES
There are five different messages which are
displayed if the vehicle detects that the DEF
system has been filled with a fluid other than DEF,
has experienced component failures, or when
tampering has been detected. The vehicle may be
limited to a maximum speed of 5
mph (8 km/h) if
th
e DEF system is not serviced within less than
200
miles (322 km) of the fault being detected.
When the DEF system needs to be serviced the
fol
lowing warnings will display:
Service DEF System See Dealer — This message
will display when the fault is initially detected,
each time the vehicle is started, and periodically
during driving. The message will be accompa
-
nied by a single chime. We recommend you
d
rive to your nearest authorized dealer and
have your vehicle serviced as soon as possible.
5 MPH Max Speed in 150 mi Service DEF
System See Dealer — This message will display
if the DEF system has not been serviced after
the “Service DEF System – See Dealer”
message is displayed. This message will contin
-
uously display until the mileage counter reaches
ze
ro, and will be accompanied by a periodic
chime. The message will continue to countdown
until it reaches zero unless the vehicle is
3
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