GETTING TO KNOW YOUR INSTRUMENT PANEL
105
Diesel Exhaust Fluid (DEF) Warning
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 the 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
following 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. Approxi
-
mately 5 gallons (19 Liters) of DEF is required
to refill the tank when this message is initially
displayed on pickup applications, and
approximately 7 gallons (26 Liters) are
required 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 contin
-
uously 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 conditions 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
required 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 Warning
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 the 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
following warnings will display:
3
2020_RAM_CHASSIS_CAB_OM_USA=GUID-6C67832B-7839-4CCF-BEFC-CDF988F949EA=1=en=.book Page 105
