WARNING
If this lamp is on, do not park in an
area where people are close by. You
must keep combustibles at least 5 ft.
(1.5 m) away from the exhaust outlet
while the HEST lamp is illuminated.
Failure to do so could result in serious
injury.
WARNING
If this lamp is on, temperature of the
tailpipe, exhaust pipes, the diesel par-
ticular filter (DPF)/selective catalytic
reduction (SCR) device and surround-
ing components including enclosures
and steps becomes elevated during
engine operation or any regeneration
event and can cause serious burns to
the skin. Allow adequate cooling time
before approaching, working on or
near any part of the exhaust system or
surrounding components.
Illuminates when the exhaust gas
temperature and exhaust components
become extremely hot.
Emissions, Malfunction Indicator
Light
Illuminates when an engine emissions
failure has occurred. The vehicle can be
safely driven but should be serviced to
correct the problem. The situation should
not be considered an emergency. In some
cases, the Malfunction Indicator Light will
activate in conjunction with the High
Exhaust Temperature, Diesel Particulate
Filter (DPF), and Diesel Exhaust Fluid
(DEF) Warning Lights.
Engine, Check Engine
Illuminates when a non emissions related
problem exists, but the vehicle can still be
safely driven. Vehicle should be serviced to
correct the problem but the situation should
not be considered an emergency.
Engine, Engine Block Heater
Illuminates when the engine block heater is
turned on.
Engine, Low Coolant Level
Illuminates with an audible alarm indicating
critically low coolant level. The vehicle
must be serviced to correct the problem
but the situation should not be considered
an emergency.
Engine, Overspeed Air Shutdown
Illuminates when the Engine overspeed air
shutdown system is activated.
Engine, Retarder (Brake)
CONTROLS - Guide to the Warning Symbols
80 Y53-6076-1D1 (09/20)
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