Hyundai Staria US4 2021 Owner's Manual page 761

Selective Catalytic Reduction system malfunction
When there is a problem with the Selective Catalytic Reduction system such as
disconnected electrical components, use of incorrect urea, etc. the following warning
message will appear on the instrument cluster. If this occurs, we recommend that the
system be inspected by an authorized HYUNDAI dealer.
If you continue to drive without the problem solved, it may adversely effect system
performance or the vehicle cannot be restarted once the engine is turned off.
Urea system failure
(= no urea injection)
Incorrect urea
detected
(= abnormal urea)
Abnormal urea
consumption
(= post treatment
failure)
Restarting the vehicle
Low urea level
Urea system failure
(= no urea injection)
Incorrect urea
detected
(= abnormal urea)
Abnormal urea
consumption
(= post treatment
failure)
The vehicle can be restarted after the problem is solved. If the 'Refill urea tank or
vehicle will not start / Refill urea tank. Otherwise vehicle will not start' warning
message appears, refill the urea solution tank. After refilling the tank, press the Engine
Start/Stop button to the ON position and wait until the message disappears. If the
vehicle cannot be restarted after refilling urea, we recommend that the system be
inspected by an authorized HYUNDAI dealer.
Malfunction
Diesel Exhaust Fluid (DEF)
system failure / Urea dosing
system error
Incorrect urea detected
Check urea system
Vehicle restart restriction
Refill urea tank or vehicle will not start / Refill urea tank. Otherwise
vehicle will not start
Service urea system in 000 km or vehicle will not start / Service
urea system in 000 km. Otherwise vehicle will not start
Refill with correct urea in 000 km or vehicle will not start / Refill
with correct urea in 000 km. Otherwise vehicle will not start
Service urea system in 000 km or vehicle will not start / Service
urea system in 000 km. Otherwise vehicle will not start
Driving 50 km after
malfunction
Check urea system
Refill with correct urea in 000
km or vehicle will not start /
Refill correct urea in 000 km.
Otherwise vehicle will not start
Service urea system in 000
km or vehicle will not start /
Service urea system in 000 km.
Otherwise vehicle will not start
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