operators_manual

Malfunction Indicator Lamp
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 Lamp
(MIL) will activate in conjunction with the
High Exhaust System Temperature
(HEST), Diesel Particulate Filter (DPF) and
Diesel Exhaust Fluid (DEF) warning lamps.
NOTE
The malfunction indicator lamp (MIL)
will illuminate if
the on-board diagnos-
tics (OBD) system detects a possible
emissions system failure. The vehicle
should be brought in for service at the
next opportunity to ensure the condi-
tion is corrected.
Diesel Particulate Filter (DPF)
Warning Lamp
This warning symbol will appear when the
DPF needs to be regenerated and then
also during the regeneration cycle. This
icon may also appear if the system is
attempting to automatically regenerate
while the vehicle is in Power Take Of
f
operation mode.
Engine aftertreatment system includes a
diesel particulate filter and DPF warning
lamp.
High Exhaust System Temperature
(HEST) Warning Lamp
Engine aftertreatment system includes a
high exhaust system temperature (HEST)
warning lamp.
Keep vehicle a safe distance from
combustible items.
WARNING
Temperature of the tail pipe, exhaust
pipe, the diesel
particular filter (DPF) /
selective catalytic reduction (SCR) de-
vice and surrounding components in-
cluding enclosures and steps, will be
elevated during and shortly after a re-
generation event or normal vehicle op-
eration when engine is under high or
heavy loading.
If the High Exhaust System Temperature
(HEST) warning lamp is on:
• Do not park in an area of
combustible vapors or materials.
You must keep combustibles at
least 1.5 m (5 ft) away from the
exhaust (outlet) stream (as it exits
the tail pipe) while the HEST lamp
is illuminated. Always park your
vehicle outside. Failure to do so
could ignite an explosion or harm
bystanders which could result in
serious injury
.
• Do not park in an area where
people are close by. You must keep
ENGINE OPERATION - Operating Instructions
Y53-1166-1G1 (08/2018) 15
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