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 system will be cancelled when:

LKAS operation
To activate/deactivate the LKAS: With the ignition switch in the ON position, press the LKAS button located on the instrument panel on the lower left hand side of the driver. he indicator in the clu ...

LKAS function change
The driver can change LKAS to Lane Departure Warning System (LDWS) or the LKAS mode between Standard LKA and Active LKA from the User Settings Mode on the LCD display. Lane Departure Warning LDWS a ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: In-car Sensor Repair procedures
Diagnosis With GDS 1. The heating, ventilation and air conditioning can be quickly diagnosed failed parts with vehicle diagnostic system (GDS). ? The diagnostic system (GDS) provides the following information. (1) Self diagnosis: Checking the failure code (DTC) and display. (2) Current data ...

Hyundai Sonata LF 2014-2019 Service Manual: Thermostat Troubleshooting
Troubleshooting SymptomsPossible CausesRemedyCoolant leakage • From the thermostat gasket Check the mounting bolts • Check the torque of the mounting bolts • Retighten the bolts and check leakage again. Check the gasket for damage • Check gasket or seal for damage ...

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