Hyundai Elantra N Owner's Manual page 280

Driving Your Vehicle
The Electronic Control Suspension
(ECS) controls the vehicle suspension
automatically to maximize driving
comfort by taking into account the
driving conditions such as speed,
surface of the road, cornering, stopping
requirements and acceleration.
System malfunction
OOSN061011L
Check Electronic Suspension
When Electronic Control Suspension
is not working properly, this warning
message will appear on the cluster LCD
display. If this occurs, have the system
inspected by an authorized HYUNDAI
dealer.
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