Hyundai Sonata lane assist problems

Filed Apr 29, 2026 · Brakes, Driver assistance · FL

Automatic Emergency Braking Blind Spot Warning/Blind Spot Detection Forward Collision Warning Antilock Brake System/ABS Lane Departure Warning Lane keeping Assistance I bought this vehicle last month from a dealer and two days later all the warning lights start popping up on the dashboard so I contacted the dealer and told them what was going on with the car they told me to bring it in so that the technician can check to see what’s wrong with it they told me that there’s nothing wrong with the vehicle so I went back home and the same day all the warning lights came back on so now I’m concerned about my daughter’s safety because she use the vehicle to drive to and from school and you never know when the brakes might fail, again I just bought this vehicle a month ago just one month not even a year and it’s having all this problem even though it’s a pre-owned vehicle I shouldn’t have to take it to the shop after one month please help… thank you

Filed Feb 11, 2026 · Driver assistance, Electrical · WA

1. All safety features related to the back up camera, EPS, Traction Control, Lane Assist, Active Cruise Control, Automatic High Beam, Forward Collision Avoidance and more. 2. Loss of all safety features and then sudden restoration of EPS would cause swerve into oncoming lanes or into neighboring lanes and/or ditches. 3. Yes the problem has been reproduced, repeatedly in cold weather and while the dealership has had it in for repairs. 4. No, but the dealership has contacted the manufacturer for repair advice. 5. Yes, every time. I have photos of my dash with the indicating lights on. 10/2/23.

Filed Feb 7, 2026 · Steering · TX

Steering will stay stuck in left or right position when turned slightly, a couple of inches. The wheel has to be jerked back to center. Vehicle will not go back to center. No lane assist of any kind are on. Excessive tire wear. Consistent issue especially when it’s hot weather. Steering wheel tilts to left when brought to centerz Cannot be reset to stay centered. Dead spot in steering.

Filed Jan 9, 2026 · Driver assistance, Engine · AL

Engine makes rattling and knocking noises. Transmission hesitates and jerks Suspension front struts and rear shocks are bad. Possible the isolators. Having horrible back pain when riding in car. Starter intermittently doesn't work Lane keep assistance goes over small bump in road will make car drive in opposite lane into on coming traffic. Took car to Tameron hyundai in Birmingham on the 29th of December 2025. Told them everything thats going on with the car. They did nothing about any of the issues. Car has 55,000 miles on it as that is when all problems have incurred. 60000 mile Warranty expires in February of this year.

Filed Sep 6, 2023 · Acceleration, Engine · 92,000 miles · GA

The contact owns a 2015 Hyundai Sonata. The contact stated while driving approximately 30 MPH, the sunroof detached from the roof of the vehicle. The cause of the failure was not yet determined, and the vehicle was not yet repaired. The vehicle also experienced severe engine knocking and the vehicle was taken to the local dealer who diagnosed that the engine was faulty and needed to be replaced. The engine was replaced, and the vehicle was repaired. In addition, several safety features including the Lane Departure, Cruise Control, and the Forward Collision Avoidance system intermittently malfunctioned. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure. The failure mileage was approximately 92,000.

Filed Aug 1, 2023 · Steering · VA

The electric power steering suddenly failed while making a turn on a neighborhood road shortly after beginning a drive. The incident also triggered warning lights for the Forward Collision Warning System, Lane Departure Warning System, and Smart High Beam System. I was able to return the car to a safe location and turn it off. When I turned the car back on later, power steering and other systems worked normally. The service center was unable to recreate the issue. They recommended replacing the steering column for a cost of $3,000+ but did not perform the service due to the issue not recurring. Approximately 10 days later, the electric power steering failed again while backing out of a parking space. It worked normally again after turning the car off and back on. It is unclear if this issue is connected to the known problem with the steering coupler in this vehicle. (My specific vehicle was not included in the recall associated with the coupler issue, but has demonstrated the steering catch/clunk that is the hallmark of that problem.)

Filed Jul 3, 2023 · Driver assistance, Electrical · NY

I first noticed an issue with the voice resignation which also is effecting the messages navigation phone and just recently the lane assist and radar. For 2 weeks I have tried to address this with Hyundai customer service with no proper response the dealer service I stating the computer head is at fault but they have no idea when they will get one from Hyundai. I know the service people will be keeping the car for week to resolve this since the whole dashboard will be removed. I was told a representative from hyundi will be contacting me on the 5th wich I doubt will happen because when I had a problem in April 2023 I was told the same thing I had the phone nearby all day and no one ever called and I am assuming the same will happen on the 5th. This is not a dealer or service dept issue it's a hyundi problem and I am reluctant to use any of the assisted driving or rely on the safety components that this car is individually installed with.

Filed Mar 14, 2023 · Electrical, Steering · NY

After 9 months of ownership, on at least five (5) instances, the car has the following things happen at the same time: 1) all warning lights on the dashboard activate, 2) the battery discharge warning light activates, a loss of power steering, no speedometer, no cameras (rear or front), no AC, and all the safety functions are disabled including but not limited to: Forward Collision Warning, Parking Collision Warning, Automatic Emergency Braking, Lane Departure Warning, Rear Cross Traffic Warning. Yes, the car is available for inspection upon request. Safety is at risk by the loss of power steering and the deactivation of all safety functions. After each instance, the car has gone back to the manufacturer's dealer for inspection, they believed it might be an electrical issue after scanning for fault codes, but after 5 times, the dealer has not yet diagnosed the issue.

Filed Nov 25, 2022 · Electrical · IN

Alternator tensioner bracket broke, causing the alternator to hang loosely, which caused the car to gradually lose electrical power to all accessories and safety equipment due to the serpentine belt being loose from the broken bracket. During traveling immediately before failure, the battery warning light illuminated on the dash panel, going on and off intermittently. Thereafter, I began losing control of all my electrical safety features, including power steering, blind spot detection, lane departure warning, forward collision warning system, and eventually power to my entire vehicle as the battery was drained of all charge. At the time of events, my family of 4, including a 2 year old and a 10 week old, were all occupants of the vehicle. With the power of the vehicle declining, the power steering was activating/deactivating intermittently causing the car to jerk one way or the other unexpectedly. Had we remained traveling on the highway at highway speeds, our safety would have been greatly compromised from the unexpected power failure to all electrical safety features. The vehicle and fractured tensioner bracket have not been inspected or confirmed by dealer or independent service provider as the vehicle is not drivable. The broken tensioner bracket is apparent and indisputable.

Filed Nov 21, 2022 · Driver assistance, Electrical · WA

The BlueLink subscription service for my Hyundai Sonata includes a feature to see the diagnostic codes my car has or has had. Attached is a document with all of the DTCs my car has reported since I purchased it new in November of 2021. There are 15 stored codes (not active) but they are still concerning to me because they have appeared from before the car was built to about 1000 miles after I purchased it. 5 codes are for the Lane Keep Assist System, 1 for the Electronic Stability Control, 5 for Smart Cruise Control, and 4 for the Tire Pressure Monitoring System. Three of the codes occurred after I purchased the vehicle with absolutely no warning or indication of any fault regarding the LKAS system.