2017 Hyundai Sonata: hesitation when accelerating

Filed Jul 26, 2026 · Engine · FL

We had a recall done, Campaign 92C, and every since then the car drives horrible. It's worse when cool, it sputters, and hesitates especially when excellerating. Even after warmed up it seems to slam in and out of gear at low speeds, even when foot is not on the gas. The drive is choppy. The dealership told us to drive it and let the transmission "learn" our driving patterns, but it has not resolved itself. Before campaign car ran smooth, now shuttering and sputtering.

Filed Nov 29, 2025 · Electrical, Engine · TX

e vehicle is burning approximately 2 quarts of oil every month with no external leaks. This indicates severe internal oil consumption, which is a known defect in Hyundai’s Theta II 2.4 GDI engines. I discovered oil inside the VVT solenoid electrical connector and on other wiring, which shows oil is traveling through the engine harness. This causes hesitation, rough running, and the risk of sudden engine power loss. The vehicle feels unsafe to drive because the oil level drops quickly, and the engine could seize or stall while driving. Hyundai vehicles of this generation have a history of excessive oil consumption, piston ring failures, and engine fires, and I believe my vehicle is experiencing the same defect. This is a serious safety concern.

Filed Jul 5, 2025 · Engine · MO

I am writing to request your assistance in enforcing the terms of the class action settlement and extended warranty coverage for my 2017 Hyundai Sonata (VIN: [XXX] ). Despite clear evidence of a defective Theta II engine, Hyundai Corporate has refused to authorize a full engine replacement unless the engine “blows” completely. This directly conflicts with the express terms of the “In re: Hyundai and Kia Engine Litigation” settlement, which requires Hyundai to cover any engine exhibiting failure‐mode symptoms. Below, I have summarized all relevant facts, diagnoses, and correspondence. I purchased this Sonata used from Oakes Kia (Kansas City, MO) in May 2023. At the time of purchase, the vehicle had 77,000 miles. To my knowledge, I am the third owner of this vehicle. Since I bought this car, I have followed the manufacturer’s recommended maintenance schedule: All routine oil changes (every 5,000 miles, or sooner) at Oakes Kia, plus one oil change at Northtowne Hyundai in April 2025. The engine currently has approximately 98,650 miles. I have driven it about 1,000 miles since December 2024 to avoid further damage and due to the danger, it puts me and others in on the road. Since December the vehicle has had persistent shaking, hesitation on acceleration, strong odor, and illuminated Check Engine Light. Car condition has worsened since last oil change and even after coil packs and spark plugs were replaced, there was no improvement. The last oil change was done at Oakes Kia along with a tire rotation and multi-point inspection. They Installed UM018 CH074: Mobil SP 5W30 SN, 21513 23001: Gasket-oil plug and 26300 35505: Filter assy-engine O Service Advisor, Fernando Perez said they did not identify root cause of the shaking, hesitation and strong odor; they instructed me to return to the mechanic who had replaced spark plugs/coil packs, possibly I got a bad spark plug or coil pack. I did this, it was not the problem. I have files to share but they are too big! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATIO

Filed Nov 14, 2024 · Engine · GA

The engine is losing oil at a much higher rate, causing a knocking sound. Not accelerating at it should without the sound getting louder and hesitating. This vehicle has been inspected by a licensing mechanic ( Goodyear). The check engine lights and multiple codes have appeared while driving for about the last 4-5 months.

Filed Aug 15, 2023 · Engine, Transmission · PA

On 12/26/22, I was on a road trip and the car began vibrating violently on the PA turnpike. The car was losing power and would not accelerate. I was forced to stop on the highway with my kids in the car. Hyundai repaired the cylinders in the engine and then it began burning excessive oil, 1 quart ever 1000 miles. For months, I drove this car and as the oil got lower, the car hesitated while driving and ran very rough. On 7/4/23, transmission overheated and once again, car lost power on the road and left me stranded with my kids. Engine is burning excessive oil and causing other issues with car. Was not fixed when car died the first time and has now left me limping along and stranded twice. Car has been at shop since 7/5/23. Engine approved, but dealer can’t get parts. Hyundai won’t approve transmission until engine is replaced, leaving me to drive an unreliable car again when transmission and engine both have known issues. It’s unsafe to continually be stranded by a car that clearly has a bad engine. Would have been more cost effective for Hyundai to replace car at this point and still being given runaround by corporate.

Filed Feb 9, 2022 · Engine · NV

Purchased this car brand new in 2017 from a Hyundai dealership. Started having issues with it 2 years later and up to now. The engine light is consistently illuminated, the oil light comes on within about a few weeks of having the oil changed with just local neighborhood driving and I have to have my oil changed every 4-6 weeks when even just driving no more than 20-30 miles a week, the mechanic who does my oil changes stated there is no oil leak but the oil stick keeps coming up BONE DRY which results in costly oil changes on a extremely regular basis. The engine has been and continues to do a very hard almost violent knocking that is so strong it can be seen from the outside of the vehicle and has affected the way i have to drive the car. The engine hesitates to take off and according to several mechanics who have looked at the vehicle it keeps misfiring because of oil pooling in the spark plugs that has been changed on a regular monthly basis now. There is a large amount of smoke that pours from the exhaust when accelerating. This vehicle is a hazard to drive and contacting Hyundai although this model and year is included in the engine recall, yields nothing but a pain as they have informed me, that my “Vin” out of all of the other 2017 Hyundai Sonata’s isn’t included in the nationwide recall of my particular vehicle…. Just my luck? I think not, Hyundai needs to acknowledge the multitude of hazards that they have manufactured and have out on road and properly offer assistance to these vehicle's owners to rectify this issue.

Filed Feb 10, 2021 · Fuel system · 61,600 miles · NC

My 2017 sonata has stalled while idling in drive. The car completely stopped at a red light; rpms dropped and it stopped. Prior to this happening, I had complained to my local dealer that when idling, it has dropped in rpms and felt like it wanted to cut off but did not...until today. At that visit, I had the fuel system serviced, as they thought that maybe this would help. That was approximately 2 weeks ago and now it has completely stopped at a light. I am taking the car back in as I am not certain what else it could be...maybe mass flow sensor? I have seen where the 2018 sonata had a recall regarding hesitation/stalling issues and now I am wondering if the 2017 has issues as well. I am afraid to drive it in heavy traffic as now it may cut off on me and not start up again.

Filed Jun 13, 2019 · Transmission · 15,494 miles · IL

Tl* the contact owns a 2017 hyundai sonata. While driving various speeds, the accelerator pedal was depressed; however, the vehicle hesitated while making a left turn. There were no warning indicators illuminated. The vehicle was taken to gerald hyundai of north aurora (209 hansen blvd, north aurora, il 60542, (877) 781-4106) and napleton's valley hyundai (4333 ogden ave, aurora, il 60504, (630) 851-2500) to be diagnosed, but the failure could not be duplicated. The vehicle was not diagnosed or repaired. The manufacturer was contacted and provided case number: 15823638. The contact was referred to the local dealer. The failure mileage was 15,494.*bf consumer stated this problem happens about every other month. Car feels like its going to stall at the red light when you pusjh on gas pedal. Noes not go for a few seconds. Car starts every time and runs otherwise.

Filed Mar 23, 2019 · Engine, Transmission · NY

Campaign 953 I received a recall notice by mail for the knock sensor detection system software update and it was completed on 03/19/2019. The vehicle doesn't accelerate past 20 MPH, jerks and hesitate. I contact the hyundai dealer service department and told them about the problem and gave me an appointment for the next day. The vehicle was inspected and I was advised that the vehicle is not safe to drive, will not provide me a loaned vehicle and will not cover a rental. My wife just gave birth to our son on 03/21/2019 and we were depending on this vehicle to transport the baby from the hospital to our home. I was basically forced to purchase another vehicle with another company, because the hyundai representative could not give me a date or an approximation of when the vehicle will be fixed. I still owed $3500 and still paying insurance for it. I need help.

Filed Feb 22, 2018 · Engine, Transmission · 9,000 miles · FL

My car has been hesitating and cuts off while driving. Whether I go 25 miles per hour or 70 my car continues to hesitate. When it hesitates I can rev the car with the accelerator to the floor but my car wont engage. I have to take my foot off the accelerator and hope my car re-engages or my engine will cut off and I have to restart it. I have had my car in the shop 5 times. 0n 11/22 orlando hyundai replaced low pressure fuel pump. On 12/18 per the tech line says high resistance injector harness and fuel rail high pressure sensor needed replacing. On 12/23 the PCM has intermittent internal open circuit. The PCM was replaced and fuel line. 1/12-1/23/18 replace control harness and crank sensor. I placed my car into lemon law. I received a letter from hyundai to bring my car in today 2/22 I was asked if I had any other problems and told them my car hesitated at odometer reading 10022 miles they check my car and was told my car has no issues found. John mc my service advisor drove my car with me in it he says he knows there is a problem and it hesitated on him and say but we don't know how to fix it. He said today we didn't recreate the issue so we believe your car is fixed. This car is a safety issue. This is the same problem I had with a 2015 sonata. I traded that in for a elantra that was way to small for me and I traded for this 2017 sonata. This car is a major safety issue. Not sure what to do. Hyundai needs to find out what wrong with this car so when this problem arises to another hyundai a solution can be found. Just give me a new sonata and I would be happy, I bought my car with 6 miles on it do the right thing hyundai. It's awful scary at 70 MPH to have this hesitation begin. What does it take for hyundai to do something (have an accident?)