2017 Hyundai Sonata Hybrid: multiple warning lights

Filed Sep 21, 2025 · Engine · MA

The engine shut off on the highway on two different days. Vehicle was going between 65 and 70 mph. The vehicle engine shut down and all the warning lights came on. Every one. The vehicle still moved but nothing inside worked, it ran on battery mode for the 17 miles to the dealership with a maximum speed of 60 mph. The risk was the immediate unresponsiveness of the vehicle and the sudden and immediate reduction in speed and power. It presented itself twice in about 2,000 miles. The dealership charged a 491$ diagnostic and found all the warnings and reset it, not reason for it happening and sent me on my way. Then it happened again. Brought back to the dealership and they tried to say they did another diagnostic and called the tech helpline. It took hours and they still don’t have a definitive answer, wanted to try almost 2k in repairs to see if it would fix the issue without any guarantees it would. Warning lights, all of them came on, cruise control, abs, engine light blinking, steering, literally everything and messages started running through the information center.

Filed Mar 19, 2025 · Engine · AZ

FAIL/MALFUNCTION 3/18/25: Internal engine failure diagnosed by local Avondale, AZ Hyundai dealership service - rod bearing failure suspected. Vehicle currently undergoing Bearing Clearance Test to affirm this or any connecting rod issues, with possible need for total engine replacement. When googling "Hyundai Sonata hybrid 2017 internal engine failure," masses of reports generate from consumers with this model, complaining of same defect, as do numerous recalls for such defects that have been mandated for the model with range of years including 2017.Yet when searching with my VIN, it says no recalls have been mandated, in spite of the undeniable, widespread identical defect. Available for inspection. SAFETY RISK: Driving on the freeway in city traffic at 70-75mph, the engine completely stopped and all dash lights lit up at once. Vehicle had to be coasted to shoulder to wait for roadside assistance. Extremely hazardous to us in vehicle and to all around us with sudden, dramatic speed change in moving, constant freeway traffic. First time: Our usual mechanics at Pep Boys did diagnostic but found nothing, the vehicle drove normally for them, yet they did our regular tune-up, oil change, etc. Two weeks later, the same event happened on freeway, identical to first time. We were very lucky that no crashes happened either time. Pep Boys advised that Hyundai investigate the issue. PRIOR SYMPTOMS: No warning lights or sounds presented until the events themselves, when the entire dash lit up. However, in the couple of months before, there were occasional, slight hesitation moments in the motion while driving at any speed. CONCERNS: 1) It seems Hyundai is on track to want to charge me for an entire engine replacement, or for whatever engine repairs they deem, e.g. connecting rods, for manufacturing defects that they are entirely responsible for, 2) no recall seems to be mandated YET for this VIN batch, and 3) too many consumers are in danger - physically and financially.

Filed Aug 31, 2024 · Engine · TN

This is the seventh occurrence of complete loss of power while driving on the interstate. The hybrid system warning activated, followed by the engine shutting down, and all dashboard lights illuminated with alerts indicating "Shut Off Engine/HEV." An 18 wheeler was pulling out from the shoulder as I was losing power and barely missed getting crushed. The former problems have all been at interstate speeds with similar accident avoided. The service history clearly demonstrates that Hyundai has repeatedly attempted to address this issue by replacing numerous critical components, including the engine, transmission, knock sensor, battery (three times), integrated brake actuation system, and smart cruise control, among others. Despite these extensive repairs, the problem persists. On this latest occasion, less than 4,000 miles and four months since the last major incident, the dealership has proposed replacing the intake manifold, EGR valve, HSG belt, and spark plugs. The belt was changed less than 20K miles ago. and I believe the spark plugs were as well. Each time my vehicle experiences this issue, it is out of commission for weeks or even months at a time, causing significant inconvenience and raising serious safety concerns. I no longer trust this vehicle and I don't believe the many recalls have successfully addressed the root cause of issues with the 2017 Hybrids.

Filed Nov 16, 2023 · Engine · 125,000 miles · FL

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated while driving 55 MPH, the vehicle became inoperable and made an abnormal sound. The contact parked the vehicle and then had the vehicle towed to a dealer after the vehicle failed to restart. Several warning lights were illuminated. The vehicle was diagnosed. The contact was informed that the engine needed to be repaired or replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 125,000.

Filed Sep 11, 2023 · Electrical, Engine · AL

This issue has happened twice in one month on my Hyundai sonata hybrid that I’ve had for less than 3 years. It is a 2017 model. While driving on the interstate, the car will stop accelerating and all warning lights will come on along with “Check hybrid engine. Turn off engine”. The dealership has yet to find out the problem and cannot tell me what the issue is both times I’ve brought it in (it’s had ti be towed both times). I cannot afford to keep paying for repairs on an almost new car along with the safety concerns of driving it. I am attaching pictures of both times it happened- noting that it is the same warning each time. It looks like multiple owners are having this issue and none has yet to be resolved.

Filed Sep 5, 2018 · Electrical, Engine · 34,000 miles · FL

On this past labor day, which was 9/3/2018, I pulled into a gas station to refuel my car. Shut off car and had key fob with me. Pumped the fuel and got back in the car. Nothing. Car was inoperable. Pressed the start button, pressed the brakes, shifted from drive to neutral and back, pressed the brake and the start button again and nothing. Dashboard lit up like a christmas tree with the key fob light on, the check engine light on, etc. Called bluelink. They transferred me to a "phone prompt" switchboard. Problem is the phone screen would not operate as it was frozen as well. Called again, lady stayed on the phone with me and transferred me. Then when transferred she was about to hang up with the message read they were closed. Wtf? I am supposed to have roadside assistance. Rep from bluelink told me to tow the car. There was nothing she could do as it was a holiday. Honestly, I was furious. I exited the car again and shut the door. Had the fob with me. Got back in and again, nothing. Could not even turn the steering wheel. Got out again and this time checked fuses, and turned switch off then on for all fuses. Nothing again. Repeated the steps as typed earlier, and nothing. About 20 minutes later I tried it again and it started. I have had my communications center replaced once already. Android auto worked when it felt like it. My sensors for blind spots turn off at will. My rear view camera works but the sensors don't always pick up oncoming cars or pedestrians. The car is going back tomorrow yet again. This time I am pushing for lemon law. The electrical system is critical to the functionality of the car. I love the mileage I get from this car and everything else is great, but I am not running the risk of driving on the interstate and the electronic system just decides to go on a vacation!