Maintenance
9-82
Diesel particulate filter (DPF) (if 
equipped)
The Diesel Particulate Filter (DPF) system 
removes the soot in the exhaust gas.
The DPF system automatically burns 
(or oxidizes) the accumulated soot in 
accordance with driving situations, 
unlike a disposable air filter.
In other words, the accumulated soot is 
automatically purged out by the engine 
control system and by the high exhaust-
gas temperature at normal/ high driving 
speeds.
However, when the vehicle is continually 
driven at repeated short distances or 
driven at low speed for a long time, 
the accumulated soot may not be 
automatically removed because of low 
exhaust gas temperature. In this case, 
the accumulated soot is out of the 
detection range, the soot oxidization 
process does not occur, and the Diesel 
Particulate Filter (DPF) Lamp (
) 
Illuminates.
The Diesel Particulate Filter (DPF) Lamp 
stops illuminating, when the driving 
speed exceeds 37mph, or when the 
engine rpm is between 1,500 and 2,500 
with the gear in the 2nd position or 
above for approximately 25 minutes.
When the DPF Lamp continuously 
blinks or the warning message “Check 
exhaust system” illuminates in the above 
cases, we recommend that you have the 
DPF system checked by an authorised 
Retailer of Genesis Branded Products.
When the vehicle is continuously driven 
with the DPF Lamp flashing for an 
extended period of time, it may damage 
the DPF system and lower the fuel 
economy.
 CAUTION
Diesel Fuel (if equipped with DPF)
We recommend you to use only the 
regulated diesel fuels, when your 
vehicle is equipped with the DPF 
system.
When you use other diesel fuels, which 
are high in sulfurs (above 50 ppm) or 
that contain unspecified additives, they 
may damage the DPF system and cause 
white smoke emissions.
Lean NOx Trap (if equipped)
The Lean NOx Trap (LNT) system 
removes the nitrogen oxide from the 
exhaust gas. A smell can occur in the 
exhaust gas depending on the quality 
of the fuel, and it can degrade NOx 
reduction performance. Please use the 
regulated automotive diesel fuel.