Hyundai Sonata: Lane keeping Assist System (LKAS) / LKAS malfunction

Check LKAS

LKAS failure indicator

The LKAS failure indicator (yellow) will illuminate if the LKAS is not working properly. Have your vehicle checked by an authorized HYUNDAI dealer.

WARNING

• The driver is responsible for accurate steering.
• Turn off the system and drive the vehicle in below situations.
  - In bad weather
  - In bad road condition
  - When the steering wheel needs to be controlled by the driver frequently.
• The steering wheel may feel heavier when the steering wheel is assisted by the system than when it is not.

The system will be cancelled when:

• You change lanes with the turn signal.
  - Using the turn signal to change lanes.
  - If you change lanes without the turn signal on, the steering wheel might be controlled.
• LKAS can transit to steering assist mode when the car is near to middle of the lane after system on or the lane was changed. LKAS can not assist steering if the vehicle follows lane marker too close continuously before transition to steering assist mode.
• The control of ESC (Electronic Stability Control) or VSM (Vehicle Stability Management) is activated.
• The steering will not be assisted when your drive fast on a sharp curve.
• The steering will not be assisted when vehicle speed is below 40 mph (64 km/h) and over 110 mph (177 km/h).
• The steering will not be assisted when you change lanes fast.
• The steering will not be assisted when you brake suddenly.
• The steering will not be assisted when the lane is very wide or narrow.
• The steering will not be assisted when only one side lane marker is detected.
• There are more than two lane markers such as a construction area.
• Radius of a curve is too small.
• When you turn steering wheel suddenly, the LKAS will be disabled temporarily.
• Driving on a steep slope or hill.