Transmission shudder, reverse gear not working, stuck in 3rd gear.

- Austin, TX, USA

The contact owns a 2015 Hyundai Sonata. The contact stated while driving 40 mph, the vehicle stalled with an abnormal knocking sound coming from the engine. There was oil leaking from vehicle. The check engine warning light was illuminated. The vehicle was taken to the local dealer and diagnosed that the CVT transmission seal needed to be replaced. The vehicle was repaired however, the failure recurred on July 20, 2021. The vehicle was taken to the same local dealer but was not diagnosed nor repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 30,000.

- Coon Rapids, MN, USA

My Sonata Eco is a 2015 model with less than 46,000 miles. I take it for scheduled maintenance at least twice every year since I purchased it. The vehicle was experiencing stuttering, vibrations and lack of acceleration, most frequently when turning, moving uphill or early after startup. The stuttering would vary in it's intensity, from barely noticeable to strong enough to shake passengers. Sometimes when performing a turn, my car would not be able to accelerate, leaving me in the path of oncoming traffic until it would start working again. This would also occur when travelling uphill. No warning lights or other messages were given by the car. After taking it to the Hyundai dealership they informed me that my transmission was faulty and would require a full replacement. They specifically mentioned it was a mechanical issue with the dual clutch not engaging properly. All electronic/software in the vehicle was confirmed by the dealership to be up-to-date so this was purely a mechanical issue.

- Boiling Springs, SC, USA

2015 sonata intermittent problem which involves loss of acceleration when taking off from a stop. One has the accelerator to the floor and vehicle goes to 10 to 12 miles/hour until it gets to about the 3rd or 4th gear. This car has done this 5-6 times since the 20th of May. Took car to dealer; they hooked it up to the computer and got no codes, so I was told it was OK. I told them the car was unsafe to drive. This car has a duel-clutch automatic transmission which I believe has a major problem. Not sure what I can do about it. It has 71,000 miles and should be under warranty.

- Loves Park, IL, USA

I was driving to work at like 4:00 in the morning it was still dark outside the light turned green and as I hit the gas pedal the car stall it was moving slow so on my right hand side there was a building so I try to make it to the parking lot the car started to power down in a knocking noise started it was a busy morning in the morning work traffic

- Fayetteville, NC, USA

The contact owns a 2015 Hyundai Sonata. The contact stated that while attempting to move from a stop, the accelerator pedal was depressed and the vehicle started jerking. The contact pulled over and waited for a while before continuing to drive. The vehicle operated as designed. The contact took the vehicle to an independent mechanic to be inspected however, the mechainc was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 26,200.

- New Hyde Park, NY, USA

The car stalled while on the road while driving to leave san antonio. The car left in san antonio to be fixed for 30 days. Returned to san antonio Hyundai replaced the engine due to a faulty engine. Metal flakes found inside engine. I am now being told I need a transmission less than 1 month after the engine replacement. Hyundai not honoring their powertrain warranty.

- Spring, TX, USA

When your applying brake on the 2015 Sonata hybrid to slow down when U hit gas again the transmission stumbles and hesitates to speed up again. It happens all the time at any speed.

- Shirley, NY, USA

My check engine light turned on and my car has power hesitation during acceleration. This happend 1-2 days out of the week until the forth time it happened the check engine light stayed on and continues to have power hesitation as well as high idling at all times, burning oil, smoke coming from the exhaust, and the brakes are extremely hard when needing to brake. I took it to a local mechanic and they did a diagnostic that returned a code of P0010 and they referred me to a Hyundai dealership for repair. I was also given a technical service bulletin with a campaign number of 15-01-022-1. I took it to the dealership and they also came back with the same code. I have paid for the parts and diagnostic and they couldn't give an estimate of when the parts would be available because they are on back order. Here I am two weeks later calling the dealership to follow up and was told by the parts department that they contacted Hyundai directly and there are 1800 of those parts on back order with an estimated time of being at least two months for the parts to come in. Hyundai also stated that they have submitted a high priority for them. I will be without a vehicle for who knows how long.

- Pueblo, CO, USA

While driving or idling the engine has always made knocking noises would often hesitate and jerk also oil consumption was excessive for a new car. The engine seemed to be faulty from the beginning now it smokes, knocks and misses constantly. I reported to dealer the problem they did nothing to repair the bad engine.

- Shelby Ms, MS, USA

My car just started making a weird knocking sound and so I pulled over and the car would not start once I turned it off.

- Lakewood, CO, USA

When I start to drive, the car jerks a few times when trying to accelerate, then it will not go over 62 mph when on the highway.

- Conley, GA, USA

Car hesitates when accelerating; loss of power; non-responsive when trying to accelerate

- Jamaica, NY, USA

The contact owns a 2015 Hyundai Sonata. The contact stated that after coming to a complete stop, the vehicle hesitated without warning while depressing the accelerator pedal. The contact also stated that the vehicle stalled while depressing the accelerator pedal with the vehicle in reverse. The contact stated that intermittently, the vehicle resumed normal operation after being restarted. The vehicle was not taken to a dealer nor an independent mechanic to be diagnosed nor repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 50,000.

- Lexington, KY, USA

Vehicle engine light started flashing while driving and vehicle would not accelerate. I was almost rear ended due to the decrease in engine speed. If I didnt quickly pull the vehicle to the grass I would've been hit. I could not drive more than 10mph after the decrease in engine speed.

- Belle Chasse, LA, USA

The contact owns a 2015 Hyundai Sonata. The contact stated that the vehicle misfired and took a while to start. The service engine warning light was illuminated. The vehicle was taken to an independent mechanic who found an unknown code, and performed a hard reset. The failure recurred. The vehicle was taken to the crenshaw Hyundai dealer located at 330 huffman mill rd, burlington, nc 27215, where it was diagnosed that the cvt sensor may need to be cleaned. The technician looked at the sensor and informed the contact the sensor needed to be replaced. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was unknown.

- Burlington, NC, USA

The contact owns a 2015 Hyundai Sonata. The contact stated that while braking and accelerating, the vehicle emitted an abnormal noise. The contact took the vehicle to suntrup Hyundai dealer (5926 South lindbergh boulevard, saint louis, mo 63123, (314) 892-2552) to have a diagnostic test performed. The mechanic located the failure code at the vehicle front left axle spline. The contact was informed by the manufacturer that the vehicle was not included in NHTSA campaign number: 14V784000 (power train). The vehicle was not repaired. The failure mileage was 76,000.

- Saint Lewis, MO, USA

My 2015 sonota has 92 K on it and has had a lifter rattle for about the last 5000 miles tried using higher octane fuel with no change rattles upon acceleration plz help me with this

- Wharton, OH, USA

While driving down highway car began to smoke from tailpipe and began to lose acceleration while driving on highway. Vehicles check engine light illuminated. Took vehicle to nearest auto part retail store for diagnostic testing. Error code P0014 came up along with 2 other codes. Took vehicle to auto repair shop. Advised the exhaust solonoid had to be replaced along with spark plugs and gaskets due to burning from theta 2.0L turbo oil feed line. Car not drivable back to houston where I reside. We had to find additional time to stay at hotel and well as pay for transportation back home. My car is still in san antonio. Recall was repaired less than 6 months ago and car now has the same issue.

- Spring, TX, USA

Was driving about 60 down paved road started hearing knocking noise under engine noise got louder when I tried to push gas because it fealt like I lost power and then suddenly car started vibrating and then turned off. And lost all power. Oil light came on for 1 sec and then turned off the the check engine light came on and then went out and T hen rolled to a stop. Car tried to start but would not start. Had to have it towed to my house because dealer was closed and then towed to dealership 2 days ago still have not heard back from them and I have no car to get back to work. My car has just turned 70,000 miles and should not be going through this.

- Hawthorne, FL, USA