One problem related to adaptive cruise control has been reported for the 2020 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 Hyundai Sonata based on all problems reported for the 2020 Sonata.
Gases from the dashboard heating cause a film to form between the windshield and the camera. Because of this, in heavy direct sunlight, lane keep assist toggles on and off without warning causing unintended lane departures with out warning. Also, when using Smart cruise control, the vehicle slows to a stop but may continue moving slowly even after displaying the press gas to continue screen. The auto hold light does not illuminate.
| Adaptive Cruise Control problems | |
| Forward Collision Avoidance problems |