2018 Hyundai Sonata: shudder or vibration when accelerating

Filed Feb 5, 2026 · Engine · OH

While driving the vehicle, I repeatedly must check and put oil in. (On average once per week) I took the car to an auto shop where I was told that the engine was bad and I must get a new one. I kept driving, putting oil in as needed, then the car in the middle of driving started to shudder and the check engine light came on. I parked the car and haven't driven it since

Filed Aug 29, 2025 · Engine · 117,000 miles · TX

The contact owns a 2018 Hyundai Sonata. The contact stated that while driving approximately 60 MPH, the vehicle shuddered before losing automotive power. The check engine warning light was illuminated. The vehicle was taken to a local dealer, where it was diagnosed and determined that the engine and NOx sensor needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was taken back to the same local dealer on several occasions for the repair; however, the failure reoccurred. The manufacturer was not made aware of the failure. The failure mileage was approximately 117,000.

Filed Sep 20, 2023 · Engine · 77,347 miles · NY

The contact owns a 2018 Hyundai Sonata. The contact stated while driving 65 MPH uphill, the vehicle shuddered. The check engine warning light and low oil pressure warning light were illuminated. The contact was able to pull to the side of the road and turned off the vehicle. The vehicle was towed to an independent mechanic, where an oil change was performed, and the spark plugs were replaced. The vehicle was repaired. The contact related the failure to the federal safety agency Action Number: DP22003 (Engine). The dealer was notified of the failure. The manufacturer was not notified of the failure. The failure mileage was approximately 77,347.

Filed Apr 17, 2023 · Electrical, Engine · NC

Was driving on freeway on the way back from visiting family in different state when rpms dropped off and suddenly lost power. Car began shuddering and check engine light started blinking. Put hazards on and somehow managed to pull over to shoulder. No problems with car or anything to indicate anything was wrong before this. Called to have car towed to dealership where they said there was a software problem and it was falsely indicating low oil levels. ECM was reset and software updated for $233 which they said fixed the problem. Said that carbon deposits may have caused the software to misread and that may have been why there was no indication of problems before. Hope so because i have a long drive back.

Filed Dec 9, 2020 · Transmission · 28,000 miles · CO

When accelerating from a stopped position the vehicle shudders or stutters before proper acceleration is achieved. I owned a ford fiesta that did the same thing and it turned out to be the clutch. Is that a possibility with my sonata?

Filed Jul 2, 2018 · Fuel system, Transmission · 40 miles · WA

Throttle response: feels like the old vehicles with a flat spot in the carburetor accelerator pump. The "three second' rule applies when the throttle petal is pushed. There is a serious hesitation as the engine tends to fall flat before accelerating. Has to due with the six speed automatic transmissions duel clutch which acts as if a person were operating a standard transmission clutch. I have discussed this problem/concern several times with the service department where the vehicle was purchased. The service department indicated they receive numerous complaints. It is indicated the drivers either love the vehicle with this problem or hate. We were never told of this situation. And there is no fix for this. This situation can occur when leaving a stopped position, when turning right or left from a stopped position, accelerating up a hill in moving traffic or on a street. This all depends on the drivers reaction to the throttle pedal. When one needs to accelerate while in motion there tends to be a shuddering/stuttering of the engine. This problem has occurred shortly we purchased the vehicle in february 2018 and has been on going. I set the "when did this happen" as starting date. Can be vary concerning when entering traffic for older drivers. I cannot find any more descriptions for this situation. There are no documents at my disposal at this time. Thank you.