Common Warning and Indicator Lamps
Lamp Description
Color
High Exhaust System
Temperature (HEST)8
*
Slow (10-second) flashing indicates a regeneration (regen)
is in progress.
IMPORTANT: When the HEST lamp is illuminated, do
not park the vehicle near flammable material.
Solid illumination indicates high exhaust temperatures at the
outlet of the tail pipe when speed is below 5 mph (8 km/h).
Amber
Diesel Particulate Filter
(DPF) Status
Solid illumination indicates a regen is required. Change to a
more challenging duty cycle (such as highway driving ) to
raise exhaust temperatures for at least twenty minutes, or
perform a parked regen.
Blinking indicates that a parked regen is required
immediately. An engine derate and shutdown will occur.
Malfunction Indicator
Lamp (MIL)
Indicates an emissions-related fault. See the engine
operation manual for details.
Vehicle ABS
Momentary illumination indicates the vehicle ABS is
engaged.
Solid illumination indicates a problem with the vehicle ABS.
Repair the ABS immediately to ensure full braking
capability.
Trailer ABS
Momentary illumination indicates the trailer ABS is engaged.
Solid illumination indicates a problem with the trailer ABS.
Repair the ABS immediately to ensure full braking
capability.
NO
CHARGE
No Charge
Indicates the alternator is not properly powering the
electrical system.
Water in Fuel
Indicates the fuel may contain water. Drain any water
collected in the fuel/water separators.
Fuel Filter Restriction
Indicates the fuel filter is clogged and requires service.
IDLE
MGMT
Optimized Idle
Indicates optimized idle is enabled.
Check Transmission
Indicates an undesirable transmission condition.
Transmission Overheat
Indicates high transmission temperature.
Instruments
3.5