Owner`s manual

Cold Ambient Derate Mode Messages
The vehicle will display messages when a derate (engine
power reduction) is activated to protect the turbocharger
during engine start up in cold ambient temperatures.
•
Engine Power Reduced During Warmup - This message
will display during start up when the ambient tem-
perature is between 10° F (-12° C) and -10° F (-23° C).
• Engine Power Reduced Up To 30 Sec (Seconds)
During Warmup - This message will display during
start up when the ambient temperature is between -10°
F (-23° C) and -25 F (-32° C).
•
Engine Power Reduced Up To 2 Min (Minutes) During
Warmup
- This message will display during start up
when the ambient temperature is -25° F (-32° C) and
below.
• Coolant Low - This telltale will turn on to indicate the
vehicle coolant level is low. See “Adding Coolant”
under the section “Maintaining Your Vehicle” for more
information.
Diesel Exhaust Fluid (DEF) Warning Messages
Your vehicle will begin displaying warning messages when
the DEF level reaches a driving range of approximately 350
miles (563 km). If the following warning message sequence
is ignored, your vehicle may be limited to a maximum
speed of 5 MPH (8 km/H) unless DEF is added.
• DEF Low Refill Soon – This message will display
when the low level is reached, during vehicle start up,
and with increased frequency during vehicle opera-
tion. It will be accompanied by a single chime. Ap-
proximately 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
(28 Liters) are required on chassis-cab applications.
146 UNDERSTANDING YOUR INSTRUMENT PANEL