NOTE: The “Wait To Start” telltale may not illuminate if
the intake manifold temperature is warm enough.
Low Diesel Exhaust Fluid Light
This telltale will turn on to indicate the Diesel
Exhaust Fluid (DEF) is low.
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 ambi-
ent temperature 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 Particulate Filter (DPF) Messages
The Cummins® diesel engine meets all EPA Heavy Duty
Diesel Engine Emissions Standards, resulting in one of
the lowest emitting diesel engines ever produced. To
achieve these emissions standards, your vehicle is
3
UNDERSTANDING YOUR INSTRUMENT PANEL 199
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