2017 Hyundai Sonata Hybrid electrical problems

Filed Nov 29, 2025 · Brakes, Electrical · UT

While traveling 40 mph, car flashes a warning, "Check Hybrid System", and then the car shuts off. No power steering and brakes are difficult. The warning is only 3-5 seconds before everything shuts down. This is definitely a hazard to myself and others. If in traffic at higher speeds, there would certainly be an accident with devastating results.

Filed Jun 16, 2025 · Electrical · 105,000 miles · TN

Odometer Fraud. The contact stated that while attempting to purchase a 2017 Hyundai Sonata Hybrid, it was later discovered that there was a mileage discrepancy. The vehicle was not yet purchased. The vehicle mileage was 87,000, but the contact later discovered that the mileage was 105,000.

Filed Sep 2, 2024 · Electrical, Engine · NY

While driving, car started to lose power. Warning lights started flashing to turn off vehicle to recharge battery. Car lost all power. Car was towed to dealership. Dealer started diagnostic testing, and first thing that was noted is that all oil had drained from car and that crank shaft may now be damaged. Prior to incident, no warning lights came on for service, engine or oil lamp. Dealer and internet searched confirm this has been happening to this model recently.

Filed Aug 10, 2024 · Driver assistance, Electrical · TX

While driving on the highway, the car loss. The dashboard noted the Blindspot Detention System failed and the dash noted "Hybrid System Warning. Turn off Engine." The vehicle was towed to the dealership. They confirmed a Knock System Sensor had to be replaced. Less than a month after the repair, the same issue occurred on the highway again and the vehicle was towed to the dealership. Vehicle has been at the dealership for over 2 weeks and dealership has confirmed they haven't been able to accurately diagnosis the problem yet. Both incidents have occurred after the dealership addressed the recall campaign related to the engine.

Filed May 24, 2024 · Electrical, Engine · KY

2017 Hyundai Hybrid Sonata lost power while in the middle lane of [XXX] . Following notice appeared: Check Hybrid system. Turn off engine !HEV. We were able to coast over to side of road (car was going 70mph at time of breakdown). Car towed to McDonough Hyundai dealership. Talked to Service Dept. We explained our situation to him (out of town, spending money on a hotel). They performed an engine electric Diag. which stated: Vehicle had multiple codes for low battery voltage. Test battery and got an instant failure. Cleared codes and test drove after new battery replacement. No codes came back. Approximately 1 hr. later in Jackson, GA we were on [XXX] , middle lane & engine stalled (70mph & coasted over to side of highway). Received same code: Check Hybrid Battery System, !HEV, turn off engine. Had car towed to Kennesaw, GA. Rented car to drive home & had car towed to Alexandria, KY our home town. After 2 wks. car was put on diagnostic machine. Said they test drove car multiple times. They said could not duplicate the issue. It was suggested the next time we get code on our dashboard to take a picture of it or video. Took car to Kerry Hyundai, Florence. Test driven car 40 miles & have gotten nothing. No codes. Told them it was imperative that your mechanics find the issue. I will not drive the car as it is now. It is unsafe as it stands now. Breaking down 2x in GA. The first time after driving it 6.5 hrs. and the 2nd time after putting brand new battery in & breaking down exactly 1 hr. after driving. We have been without our car since [XXX]. Hyundai advertises a great warranty on their cars, one reason we purchased it. We wanted a SAFE, RELIABLE car since we are both retired and going to travel. We are out of $1,827.08 & afraid to drive car. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Nov 27, 2023 · Electrical, Fuel system · CA

In May, the engine completely failed as I was driving on the freeway, without cause. It had to be towed to the dealership where luckily the engine was replaced under warranty. Less than 6 months later, the HEV and CEL warning lights came on as I was commuting to work via highway. The car was very low powered, hard to accelerate, and immediately decelerated whenever I started to let off the gas pedal. It struggled to go at or above 60-65 mph. The freeway speed was 70 mph and it was a safety risk for the car to power down. Dublin Hyundai could not replicate the problem, simply recharged the battery and said I was good to go. Less than 1 week later, the exact same thing happened as I started on a road trip. I had to return the car home and get it towed to Stockton Hyundai for diagnosis. This is car is only 6 years old, has been routinely maintained, and just hit 100k miles, for which Hyundai is denying any repair assistance even though there is a lifetime hybrid battery warranty.

Filed Nov 4, 2023 · Electrical, Engine · CA

Engine Shut Off Without Warning problem of the 2017 Hyundai Sonata Hybrid While driving the car on the freeway, it will jerk forward and then shortly after lose power. I pull over (luckily haven't been killed yet) on the side of the freeway. I've taken my car to a Hyundai dealership third times. All Three time I was stranded on a busy california highway. I have looked into this warning over a year and no one seems to know the problem. This should be a recall and all Hyundai dealers should be made aware of what this warning is. We as Hyundai owners need answers and help.

Filed Oct 11, 2023 · Airbags, Electrical · CO

1) I purchased 2017 Hyundai Sonata Hybrid new. Now for 2nd time, trunk latch won't open trunk. 1st time i paid for a new park on the trunk. Now again, trunk won't open. Dealer states they have to replace rear bumper antenna. 2) Airbag light came on on the dash, and remains on when I start car. Dealer stated it is the driver seatbelt light. I Never had an accident with this vehicle and air bag(s) have never inflated. Dealer stated they will have to replace driver airbag which will cost me $1,436.35. I don't know why I have to pay for a new driver airbag when I bought the car new and never had an accident with the car.

Filed Sep 28, 2023 · Electrical, Engine · 142,000 miles · TX

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated while driving 60 MPH and taking an exit, the vehicle stalled. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed that the power relay assembly and battery needed to be replaced. The vehicle was repaired, but the failure recurred. The contact stated that the vehicle started but failed to move. The contact stated that the failure was related to TSB Number: 20-01-003H. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 142,000.

Filed Sep 27, 2023 · Electrical · VA

I first experienced HEV hybrid system issue back in 2022. I took my sonata to the dealership which they had over a month to try to fix the problem which they did for the time. Now a year later I’m back with the same issues and the dealer basically saying they can’t see my car for a month then don’t know how long it’s going to take to fix the issues if the even. Nobody can really tell me what’s wrong with my car. This the second time it’s been a safety hazard while driving on the interstate and the system malfunctions causing a hazard to me and drivers around me because the vehicle has basically cuts off rapidly slowing the vehicle down