Hyundai Elantra 2019 Owner's Manual page 545

Gasoline Particulate Filter (GPF)
(if equipped)
The Gasoline Particulate Filter (GPF)
system removes the soot in the
exhaust gas.
The GPF 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 continu-
ally 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 may reach a
certain amount regardless of the soot
oxidization process, then the GPF
lamp will illuminate.
The Gasoline Particulate Filter (GPF)
Lamp stops illuminating, when the
driving speed exceeds 80 km/h (50
mph) with engine rpm 1,500 ~ 4,000
and the gear in the 3rd position or
above for approximately 30 minutes.
When the GPF lamp starts to blink or
the waning message "Check exhaust
system" pops up even though the
vehicle was driven as mentioned
above, we recommend that you have
the GPF system checked by an
authorized HYUNDAI dealer.
With the GPF lamp blinking for an
extended period of time, it may dam-
age the GPF system and lower the
fuel economy.
CAUTION
Gasoline Fuel
(if equipped with GPF)
We recommend you to use only
the regulated gasoline fuels,
when your vehicle is equipped
with the GPF system.
When you use other gasoline
fuels which contain unspecified
additives, they may damage the
GPF system and cause exhaust
emission problems.
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