Ram Trucks 2014 Chassis Cab Commercial - Diesel Supplement - Manual (Page 178)

• If the system detects that the level of fuel in the tank
has increased.
• Add a minimum of 2 gallons (9.5 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 (9.5 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 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:
• 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 accompanied by a single chime.
We recommend you drive 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
continuously display until the mileage counter reaches
176 UNDERSTANDING YOUR INSTRUMENT PANEL