Dodge RAM CHASSIS CAB2018 User Manual page 59

• Coolant Low — This telltale will turn on to
indicate the vehicle coolant level is low.
Refer to "Dealer Service" in "Servicing And
Maintenance" in the Owner's Manual at
www.mopar.com/en-us/care/
owner-manual.html (U.S. Residents) or
www.owners.mopar.ca (Canadian Residents)
for further information.
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 ve-
hicle 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, dur-
ing vehicle start up, and with increased
frequency during vehicle operation. It will
be accompanied by a single chime. Ap-
proximately 5 gallons (19 Liters) of DEF is
required to refill the tank when this mes-
sage is initially displayed. on pickup appli-
cations, and approximately 7 gallons
(26 Liters) are required on chassis-cab ap-
plications.
• 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 gal-
lons (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 con-
tinuously display when the counter reaches
zero, and will be accompanied by a periodic
chime.
The vehicle will only be capable of a maxi-
mum 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 ve-
hicle may be limited to a maximum speed of
57