Hyundai Staria US4 2021 Owner's Manual page 763

NOTICE
• The following situations may damage
the DPF system.
- Fuels or any unauthorized liquids
are added to the urea solution tank
- Additives are mixed in the urea
solution
- Water is mixed in the urea solution
• Use only specified urea solution.
When any unauthorized urea
solution is added to the tank, we
recommend that you contact an
authorized HYUNDAI dealer.
• When any foreign substances enter
the urea solution tank, the following
problems may occur.
- Increased emission
- DPF system malfunction
- Engine failure
• Never add used urea solution as
its quality cannot be guaranteed.
Always add new urea solution.
WARNING
• Do not apply any external impact on
the DPF system. It may damage the
catalyst, which is equipped inside
the DPF system.
• Do not modify the DPF system by
redirecting or lengthening the
exhaust pipe. It may adversely effect
the DPF system.
• Avoid contact with the drained water
from the exhaust pipe. The water is
slightly acid and harmful to skin. If
contacted, thoroughly wash it off.
• Any modification of the DPF system
may cause system malfunction.
The DPF system is controlled by a
complex device.
• Wait for the DPF system to cool down
before maintenance, as it is hot due
to heat generation. Otherwise, it may
cause skin burn.
• The Selective Catalytic Reduction
system (for example, urea solution
nozzle, urea solution pump, and
DCU) operates for approximately
2 minutes more to eliminate the
remaining urea solution inside,
even after the engine is turned OFF.
Before working on the vehicle, make
sure that the Selective Catalytic
Reduction system is completely
turned OFF.
• Poor urea solution or unauthorized
liquids may damage vehicle
components, including the DPF
system. Any unverified additives
in the urea solution may clog the
SCR catalyst and cause other
malfunctions, which require
the expensive DPF system to be
replaced.
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