Warnings Problems of Hyundai Sonata

My 2015 Hyundai Sonata has a defective engine. The motor failed unexpectedly even though the car has low usage and has always been maintained properly. I was informed that many Hyundai engines from these years came with manufacturing issues, and mine appears to be one of them.

See all problems of the 2015 Hyundai Sonata 🔎.

In morning dew/foggy winshield, the systems will disable easily. You get pop ups such inattentive driving disabled, camera obscured. And forward collision warning disabled, camera obscured. I’ve had many vehicles in the past and the safety systems never disable this easily over slight fog or slight morning dew. Even with a lot of fog on the winshield my other cars are still fine. I also have a 2023 elantra that has never done this before. It seems to be an issue in Hyundais new driver assistance systems in 2024+ vehicles.

See all problems of the 2024 Hyundai Sonata 🔎.

My 2015 Hyundai Sonata has demonstrated multiple instances of unintended acceleration and braking failure: April 20, 2024 – while idling in a drive-thru line, the vehicle suddenly lurched forward without any attempt to accelerate and crashed into the vehicle in front of me. I was unable to stop it. This resulted in the other car being totaled. I took it to a Hyundai dealership afterward, but they found no definitive cause. April 4, 2025 – my daughter was driving and attempted to stop at a red light. Despite applying the brakes, the car did not stop and continued through the intersection, striking the door of another vehicle. May 12, 2025 – today, while using cruise control set to 55 mph, the car began accelerating beyond the set speed without input. It appears the cruise control system is malfunctioning and not disengaging as expected. The vehicle currently shows no open recalls, but I found that similar issues were previously investigated under NHTSA action dp21003 for this model year. These incidents occurred months apart, but the behavior is consistent and extremely dangerous. I am requesting a formal investigation. The safety of my family and others on the road is at risk.

My 2020 Hyundai Sonata has a recurring defect in its engine or transmission, causing sudden deceleration to ~10 mph without warning, often on major highways, with warning lights (check engine, esc, traction control, etc. ) flashing seconds before the car decelerates. This forces me to swerve off busy roads, endangering me, my passengers, and other drivers. Near-misses with traffic pose an extreme safety risk, causing significant emotional distress. The car, at a Hyundai dealer since April 21, 2025, is available for NHTSA inspection. The issue began in January 2021, five months after purchase, with all the warning lights appearing during incidents along with rapid deceleration. The Hyundai dealer confirmed the problem in seven repair attempts (January 2021, December 2021, January 2022, November 2024, February 2025, and twice in April 2025) but never properly diagnosed or fixed it, citing no consistent diagnostic codes. Only the dealer assessed it; no inspections by Hyundai’s manufacturer, police, or insurance occurred. In November 2024, the defect recurred immediately after pickup, despite false assurances it was fixed. In February 2025, the dealer kept the car over a month with minimal communication, yet it failed again. I picked up the car on April 4, 2025, but it broke down on April 6, less than 55 hours later. I returned it April 7 and picked it up April 17, and it failed again on April 21, 2025 with the vehicle remaining at the dealer since. The dealer and Hyundai offer no solution and this dangerous issue keeps recurring. Similar NHTSA complaints suggest a broader issue. Rapid recurrences—hours after April 4 and four days after April 17—prove the car is unsafe and assurances of repairs are untrustworthy. I no longer trust the Sonata or Hyundai’s repairs, as the defect persists.

See all problems of the 2020 Hyundai Sonata 🔎.

I have not had accident in vehicle. There is a driver attention warning feature in the 2024-2025 hyaundai vehicles that can not be turned off. They were able to be turned off in previous models. Because of the over sensitivity of the feature it creates a distraction while driving. It triggers activation after 10 minutes of driving and goes off if you’re swerving or wearing sunglasses, etc. A number of reasons. However, while I have been driving perfectly fine, it continues to go off and beep every 5 or so minutes. No swerving. Both hands on wheel. The feature isn’t a bad idea but needs to be less sensitive and able to be turned off. Going off so consistently creates a distraction to me while driving. I could see there potentially being many lawsuits regarding this due to accidents. I have spoken to multiple hyaundai dealerships and they all say there is nothing they can do.

My 2020 Hyundai Sonata has a recurring and dangerous defect involving sudden deceleration while driving. Without warning, the car abruptly slows to ~10 mph—often on the highway—while numerous dashboard warning lights activate. This poses an extreme safety risk to me, my passengers, and other drivers, as it forces me to maneuver off the road to avoid being hit. The issue began in January 2021, just five months after I purchased the car new. It has occurred repeatedly and unpredictably since then. I have taken the vehicle to Hyundai-authorized dealers for repair on five occasions (January 2021; December 2021; January 2022; November 2024; and February 2025), but the problem has never been properly diagnosed or fixed. In November 2024, the issue occurred immediately after I picked the car up from the dealership when they told me it was fixed and ready to drive. This most recent occurrence (February 2025) before tonight's incident on April 6, 2025, the dealer had my vehicle for over a month. During this time, communication was seldom initiated by the dealer. Now the problem recurred less than 55 hours after picking the vehicle up from the Hyundai certified dealer, who told me the issue was fixed and the car looks and runs great. Unfortunately I found myself in this dangerous situation despite the dealer's reassurances and Hyundai's involvement overseeing the repair process. The unsafe, defective Sonata is currently in my possession as I figure out next steps. Each incident is accompanied by multiple warning lights (e. G. , check engine, esc, etc. ) but the dealer represents that no consistent diagnostic codes have been found. I’ve also found multiple similar complaints from other Sonata owners on the NHTSA site, suggesting this may be a broader issue. This unresolved defect has made the vehicle unsafe to drive and caused significant emotional distress. I no longer trust the car or the assurances from Hyundai or the dealer that it is fixed.

My 2020 Hyundai Sonata has a recurring and dangerous defect involving sudden deceleration while driving. Without warning, the car abruptly slows to ~10 mph—often on the highway—while numerous dashboard warning lights activate. This poses an extreme safety risk to me, my passengers, and other drivers, as it forces me to maneuver off the road to avoid being hit. The issue began in January 2021, still with less than 4,000 miles and just five months after I purchased the car new. It has occurred repeatedly and unpredictably since then. I have taken the vehicle to a Hyundai-authorized dealer for repair on five occasions (January 2021; December 2021; January 2022; November 2024; and February 2025), but the problem has never been properly diagnosed or fixed. In November 2024, the issue occurred immediately as I drove off the dealer's lot, having been assured the vehicle was repaired and safe to drive. The most recent visit lasted over a month, yet the dealer could not replicate the problem and returned the car to me in early April 2025, without a clear resolution. The vehicle is currently in my possession and available for inspection. Each incident is accompanied by multiple warning lights (e. G. , check engine, esc, etc. ) but no consistent diagnostic codes have been found. I’ve also found multiple similar complaints from other Sonata owners on the NHTSA site, suggesting this may be a broader issue. This unresolved defect has made the vehicle unsafe to drive and caused significant emotional distress. I no longer trust the car or the assurances from Hyundai or the dealer that it is fixed.

While driving my car on 3 different days the car slowed down, and the lights came epb on, on the dashboard the epb light came on the check engine light came on , forward collision light, auto hold light, slippery road light , and caution light with a ! mark.

During snow and icing conditions the forward collision radar in the logo gets covered up and becomes inoperable. This at the very time that we most need forward collision warning. It would helpful if there was electric deicing in the unit, much like the rear view side mirrors.

See all problems of the 2023 Hyundai Sonata 🔎.

While driving at about 45mph a warning flashed on my dash. I couldn't read it before it disappeared, but it was something about front collision. , contact dealer. The car immediately lost all power. Everything was still running, but I had no acceleration. I had to back down a busy road into a vacant lot. I had just come off of the highway when this happened, if I had still been driving on the highway, I would have been hit by a car from behind, since there was no warning at all. The car was towed to a Hyundai dealership. After a diagnosis, it was said to be the throttle body. I had to wait for the repair because the part was on back order. I was told that there was another car there waiting on the same part. I am afraid to drive the car now, even though the repair was made. I feel this is a safety hazard, and that someone could be injured or killed because of this issue with the car.

I was driving on the freeway and my car lost all power. My indicator dash board flashed lights and a loud beeping sound. The warning lights flashed to check my hybrid system and turn engine off, hev. My car immediately lost power and turned off. I was on the freeway, I almost got into an accident, cars were honking at me. My vehicle was towed by my insurance company. I receieved a phone call from the service advisor today, he informed me that I need an electical water pump and the cost quoted to me is $1908. 00. When I complained to the advisor he told me that water pumps only last 3-5 years. I told him that my previous car was a 2013 Sonata and sold it with 100,000 miles and I never had water pump issues. My online research discovered that this has been a recurrent issue with 2018 Sonata's.

See all problems of the 2018 Hyundai Sonata 🔎.

Forward collision warning appeared, vehicle lost power and would not accelerate. Vehicle kept loosing power. Multiple codes appeared. I am an ase certified mechanic, so I went to my own business to get my scanner and there was a list of codes. Vehicle is currently at dealership and they are tracking down issues. Currently blaming an ecm but unsure. This is the second vehicle I have had this exact issue with. I have video that it won't allow me to upload of all the codes. I have a video of a previous issue, with a different vehicle. It's a 2023 Hyundai santa fe.

I was driving home from work and I fell a sleep behind the wheel and hit a park car. The police report states that my impact speed was 50mph. My insurance company is very concerned that my air bags or sensors are defective and that I contact you immediately. Due to the damage and impact of the accident.

Bought the car on 08/20/2022. On 09/07/2022 we took the car back to allen turner because the engine light was flashing and the car would not go over a certain speed. There were metal shavings in the oil. It was throwing code p1326. They did an update on car and told me the cylinder walls were scored but the motor had a lifetime warranty no matter what happened to it. Every time we would have the oil changed, we would have to add 3 quarts of oil every 10-15 days. The vehicle stalled out at a very busy intersection nearly causing a wreck with my teenage daughter driving. Had it towed to dealership and they said it needed a new motor because it has one of the defective motors in it according to the VIN. Then they told me it was oil consumption and they could replace spark plugs and oil and it would be drivable but it would stall, it would break down and the motor will seize. It is only a matter of time. Hyundai will not honor the warranty on it because the motor is not seized up. The service manager told me to drive it until it seizes and then they would cover the engine replacement. The vehicle is not safe to operate. It is a safety hazard for anyone to drive. Hyundai will not stand behind their products when they already know it is defective.

See all problems of the 2016 Hyundai Sonata 🔎.

Tonight on 7/29/2023 after driving between 5-10 miles at night with very light traffic, my dashboard flashed a message telling me "forward safety system disabled. Radar blocked. " after receiving this message and it clearing from the digital instrument cluster, a small triangle appeared with a exclamation mark. After driving between 1 to 5 miles further down the interstate the triangle cleared from the screen. There is no damage to the grill, or sensor, and no indication of mechanical issues as I was driving down the road. The grill and sensor both also have little to no dirt as I routinely wash my car each weeki have read through multiple other comments like me stating nothing whatsoever is on the front grill that could be obstructing the sensor. And like the other complaints, if there is no warning light, there is no code stored!.

1. Driver side airbag. Inspected. 2. Airbag safety light is on in the console. Driver may receive injury or death if airbag does not deploy during accident. 3. Yes by antioch napa auto center (925)757-7274 4. Yes 5. Yes. Warning light lamp is on for the driver side airbag. First appeared around 7/27/2023 diagnostic test: found code b138000 driver front airbag was not responding. Air bag not registering on scan tool. Tested airbag in seat and it had . 1ohm. There is a short in airbag.

I was driving down the street and I hit a car because I felt that I lost the control of the car momentarily and it happened as it is described on this recall - 22v746000: the vehicle's "fail-safe" limited-mobility drive mode may be impaired, when prompted by a transmission oil pump malfunction, which can result in a complete loss of drive power. As a result the car crashed into another vehicle. Have the car since 24th of March. Have been feeling at times that I fight to be the driver with the car. Spoke to friends about the issue and they were concerned about that too.

See all problems of the 2022 Hyundai Sonata 🔎.

Vehicle in front of me stopped. Six car lengths between us. I applied brakes, nothing, I even put my left foot on top of my right foot. There was plenty of time to stop but brake peddle wouldn’t go down, felt like it was locked. Automatic brake sensor didn’t work either. Still waiting for inspection from manufacturer , 3 weeks. Never had any problems prior to this, after accident my warning came on about front collision failure .

See all problems of the 2021 Hyundai Sonata 🔎.

My car barely has 11,000 miles and just the other day it had about 20miles left of gas but as I was driving on the road it started to feel and seem like it was about to die on me, also the front wipers are not well restrained with the vehicle you can tell by the way it moves when wipers are on. . . . Also most of the signals be it if something is in front of me and the signal goes off but theres nothing there . . . Also when im backing up sometimes the car itself will force stop as if something is in the way . . . But again nothing is there at all . . . It happens every few days . . . . I just purchased this car . . And really thinking it was worst mistake w all these issues already.

About a year and half ago, a lot of my engine trouble lights turned on while driving. It was sleeting at that time when the lights turned on and they're still on today. I paid to have the Hyundai dealer to check it out soon after the trouble lights first turned on. They diagnosed the problem as a faulty hecu. I would have had them replace this, but they estimated it would cost about $3800 to fix. This hecu malfunction is causing the following issues: abs does not work, traction control does not work, forward collision prevention does not work, brake auto hold does not work, cruise control does not work probably because it can't auto brake any more. I've had some scary times driving and trying to stop when the roads have been wet or snowy.

Rear passenger door will not lock manually or via manufacturer installed causing issues with child safety lock and at high speeds can be opened causing injuries and or death ,windscreen on panoramic sunroof detaches causing safety hazard.

Forward collision warning is frequently inaccurately sensing collision even when no other vehicles are on the road. I am now afraid to use adaptive cruise control because I fear sudden breaking especially when merging lanes.

The forward collision warning, automatic emergency braking and adaptive cruise control failed as the first 2 activated when there were no oncoming collisions in front of me and the nearest cars around me were 1/4 of a mile away. The cruise control failed as it turned back on after the vehicle veered off the highway and into the rest stop. My safety and the safety of a lot of other people in the rest stop were put at risk because the system malfunction and tripped when no other cars were present that would have led to a collision. The vehicle led me off the highway into the rest stop where others could have been fatally hurt. I ended up with a shattered left foot that required a major reconstructive surgery to mend but the break will affect me the rest of my life, with more problems developing later on in life as well. No one inspected the vehicle or listened to what I had to say. No investigations were launched by insurance, the manufacturer or the police. If anything, insurance and the manufacturer seemed like they were in a hurry to dispose of the vehicle, urging me to release vehicle where it was sent to after the crash to one of insurance centers. The collision warning light came on and the vehicle responded by hard braking and veering to the right, then the cruise control turned back on and accelerated into the rest stop, first bouncing up the curb and onto the dirt, hitting a sign on the passenger side then bouncing off a tree on the driver side and finally t-boned a parked boat on a trailer head on. The vehicle was a total loss.

When backing up the vehicle we break when no objects are present. When stopped at a light, the vehicle will detect that cars are too close or will sense objects are around when nothing is around. The collision warning will sound at random times.

I first begin having an issue with the idle speed. It would jump up to 1,500 rpm, which is twice the normal 750 rpm level it started almost from the very beginning when I purchased this car new in early 2020. I mentioned it at first oil change at dealer at 3,500 miles. I was told it was normal. In the beginning it would come and go. Sometimes not happening for weeks in-between episodes. Then it started to have the check engine light come on after it would happen and stay on. I took it back while light was still on and they kept the car for several days. Said it was the epv valve and replaced it. Car operated fine for a few days then started up again. It also started to idle up and down from 1500 down to 500 in a rapid succession. I was able to get it to stop sometimes by turning engine off and them back on. Again I contacted dealership and took car back in. They gave me a loaner car and kept my car for over a month. This time they replaced the computer they told me. I did not have car for more than a week before it started doing it again. It has gradually gotten worse and happens more often now. It has also started to have the forward collision avoidance warning come on in addition to check engine light as well. Just this week it actually just died on me while driving and forced me to pull to side of road. Turn off the engine and restart the engine. This happen 3 times in succession. Dealership does not seem to have any idea on what is going on and have been not very helpful. 3 week wait to get an appointment to bring in and no loaner cars available. This problem with the 2020 vehicle is very dangerous. It can idle up at anytime and car will lurch, requiring forceful brakeing . Car dying while driving and losing power as well.

Motor seized , powered off while driving down the highway at speeds of 55 miles of hour on a hill and would not start back , without warning other than a loud noise right before it shut off.

See all problems of the 2012 Hyundai Sonata 🔎.

I leased a 2021 Sonata, and the car has been a nightmare. My car has been serviced by the dealership twice for a steering wheel that will not stop making noises. I am very concerned for my safety in this car. The wheel becomes hard to move. Also, last year, the car was in the shop for four months while the forward collision sign needed to be fixed. The car stopped twice. I am terrified to drive this car; it only has 9,200 miles.

I'm concerned about this recall due to the fact that I can tell the difference in my car and I'm just trying to be safer while driving so if I can get any information about this that would be great.