2017 HYUNDAI SONATA Complaints

Check Hybrid system. Turn off engine. Driving one hour in 90 degree temperature and this warning appeared on dash with VERY loud warning. Warning continued until I found a safe spot to pull off the road out of traffic note loud warning continued until I was able to shut off the engine.

Car is burning an excessive amount of oil. After getting the oil changed I needed to add additional oil. Car is driving sluggish and won't pick up speed. In 2023 the car bucked, check engine light came on and the car failed to drive over 60mph. I took to Firestone to be repaired and they fixed the knock sensor. After a few weeks, the car bucked, check engine light came on and car would not drive over 60, they also informed me the car used too much oil since I drove it last, there was a service bulletin for the oil consumption and to take to Hyundai. Took to dealer for repair, they said engine consumption is fine. After a few days cars started becoming sluggish not picking up speed. I checked the oil - it was empty.

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated that on three separate occasions, the vehicle stalled. The contact stated that while his wife was driving at an undisclosed speed, the vehicle stalled. Several unknown warning lights illuminated. The contact’s wife was unable to restart the vehicle. The contact stated that he was then notified by his wife of the failure and arrived at the scene to move the vehicle off the roadway. The vehicle was then towed to the dealer where it was diagnosed that the assembly generator failed and needed to be repaired. The vehicle was repaired; however, the failure recurred. The contact stated that while driving at an undisclosed speed, the vehicle stalled with several unknown warning lights illuminated. The vehicle was towed back to the dealer where it was diagnosed that the knock sensor failed and needed to be replaced. The vehicle was repaired; however, the failure recurred. The contact then stated that three days later while driving at an undisclosed speed, there was a knocking sound coming from under the hood and the vehicle stalled with several unknown warning lights illuminated. The vehicle was taken back to the dealer however, the mechanic was unable to determine the cause of the failure. The vehicle remained at the dealer unrepaired. The manufacturer was not notified of the failure. The failure mileage was approximately 100,000.

The engine is burning about 3 quarts of oil every 500 miles of driving. It is causing carbon to gunk up the spark plugs every month and a misfire will happen at random. I tried contacting the dealer and even though they have several complaints, they said they won’t do anything. I have brought it to several mechanics and they say the manufactured engine needs to be replaced.

Occurrence: This has been a recurring issue for over a year (over a year, might be closer to two years now) for our PHEV Sonata. It has happened approximately 10 times. Problem: Total engine shutdown when driving the car. "Shut down engine" type error message pops up and cannot accelerate. Steering still works, but it can be hard to pull over due to lack of engine power. The car can be restarted after shutting down, but must first come to a complete stop and into Park. Safety Issue: The car stops working. Obviously, this would be quite dangerous on a busy road, a highway, or if you were taking a left turn, etc. Confirmation: The dealer indicates that the hybrid battery is a problem and should be replaced. However, due to supply chain issues, we have been waiting for over a year for the replacement. **** Reproduction Steps: **** We have found that it is most likely to happen with a fully charged battery and a sudden braking action. I suspect the issue happens when trying to charge the battery but due to its condition, it shuts down instead. It tends to happen: 1) Full Charge: Battery is fully charged overnight or "topped up" to full charge 2) Sudden Braking: Having to brake hard, such as being cut off. We have found that adjusting charging and driving habits has reduced but not eliminated the issue. Suggestion: I would suspect that having some electrical component to prevent a sudden overcharge might eliminate this problem (shunting excess current or turning off regenerative braking for sudden stops). Warning Messages: A warning message is seen, but it happens at the same time the engine is shut down and disappears before you could take a picture of it (as you are busy trying to do an emergency pull over).

My engine seized up after burning every drop of oil dry. My last oil replacement was 5,200 miles prior, and Hyundais recommended mileage before replacement is 7,500 miles. I never got a single oil annunciator light.

2017 Hyundai hybrid Sonata Check hybrid system turn off engine, It’s been at a dealership for three months last time. after year later same issue again.

Engine consumes way to much oil got oil changed and a week later it was almost empty when i checked. This has been an ongoing issue for many years already.

At the beginning of March 2023, I observed that the white paint on the roof top is peeling off. Since Hyundai sent a extended warranty at the end of last year I took it to the dealership when I went for fixing a recall (Anti-theft software upgrade). They said that they don’t do paint job and asked me to call Hyundai US. Hyundai US said that the dealership is supposed to coordinate with a body shop to get this completed and file a reimbursement to Hyundai US. My contact person in Hyundai US called Hyundai dealership in Kirkland, WA and responded saying, this is only a cosmetic fix, and I should focus on completing the 60K service mileage, including brake change. I see that the paint is starting to peel off in more places and I am concerned that in few months it’ll spread all over the car.

Since Aug 2021 I started to feel the steering is very tight. Even with a small move car steers very quickly. I have to hold the steering with both hands. Before that it was very easy to drive, even with one hand. Since then, every time when I went to Hyundai dealerships for regular maintenance I brought up about this. I was taking to Hyundai dealership in Kirkland, WA and Renton, WA. They checked and said that they don't feel it. I called Hyundai US and they assigned a case number and assigned a person to work with me. She suggested that I go back to the dearlership to ask them to inspect once again. When I went to the dearlership on March 27th, 2023, they said that the warranty has expired. When I called Hyundai US, she talked to the dearlership and now they are asking me to complete the 60K service mileage, including brake change before they can look at this issue. I am concerned about the safety. In many forums on the internet, I read that car steering jams right in the middle of the highways, leading to accidents.