2023 Hyundai Sonata

2023 Sonata N-Line, complete loss of power while driving on seven (7) occasions over the past year. In all cases above 60mph creating a dangerous condition to myself and fellow drivers while attempting to pull to the side of the road while rapidly losing speed. In all seven (7) cases, the DTC code is P065312. I have asked the dealership to note the recurring issue in my service records and I have reached out to Hyundai, mostly so that if I am involved in a serious accident because of this issue, there is a paper trail for legal purposes. The dealership folks are nice but basically unless the car rolls into the dealership with smoke pouring out of the engine, they want to charge a diagnostics fee and keep the car for multiple days which isn't helpful because like most, I need the car and the issue is extremely sporadic. It is disappointing and I hope Hyundai takes note and provides remedy for the issue sooner rather than later as this is my sixth (6th) Hyundai vehicle and really do like the car otherwise. All incidents below: 01/23/2025 - 9531 miles 01/20/205 - 9128 miles 12/15/2024 - 5500 miles 12/13/2024 - 5374 miles 11/22/2024 - 2409 miles 01/12/2024 - 568 miles 01/08/2024 - 554 miles

I was driving into work on a major road (about 45 mph) when my 2023 Hyundai Sonata stopped accelerating and my engine gave out. Initially I thought I was accidentally pressing on my break pedal but when I realized I wasn’t pressing the break, I had just enough time to turn on my hazards and get out of traffic and onto the shoulder of the road. I was stuck between a main exit and the major road. My battery, oil, and engine lights came on (no service lights had been on prior to this incident) and my car was just very slowly rolling before it automatically engaged my parking break - which makes me fearful of what would have happened if I had still been in busy traffic. I could gotten very badly rear-ended. My car only has just over 5600 miles and I never had any issues with it before and kept up with the general maintenance. I attempted to restart my car to no avail and about 30 minutes later I was able to restart my car but there was a very strong vapor smell in the cabin of my car. I got my car towed to a dealership and was informed one of my fuel injectors was misfiring/gone bad - similar to many other incidents on this site. I asked the dealership if they were able to view the state of my other fuel injectors and was told they were unable to do that, so I am unsure if other fuel injectors will go bad in the future.

Twice within the first 26k miles i had 2 individual fuel injectors go bad. Both times my check engine light came on in the middle of driving, and then my car would no longer increase in speed and left me stranded on the road. Luckily, i was able to pull over to the side of the road. The random malfunction of the vehicle could’ve caused an accident or put my life, as well as the drivers on the road, in danger. When my vehicle arrived at the dealership, i was told that it was “because of the gas i was putting in my car”. I have never had any problems with any other vehicle when using the same gas, and have never heard of it from anyone else except from people with the same make and model as me. The dealership refused to replace the other 2 remaining fuel injectors because “they aren’t in need of repair” but acknowledged that I will just have to wait until the other 2 fuel injectors go bad and possibly be stranded in the middle of the road again. When picking up my vehicle after the seconds repair, I was told that my timing cover was leaking oil and that was repaired as well. When asked how that happened, the service center told me it was a factory malfunction. The first incident where Cylinder 2 went bad was on 12/27/2023 at 13,143 miles The second incident where Cylinder 3 went bad as well as the leaking timing cover was on 12/2/2024 at 25,890 miles

I bought the new car on 11/21/22. There have been two incidents with the same cause. Incident #1: On 1/25/23, while I was on a six lane highway with high speed traffic and rush hour level traffic, the car began to fail, with 'bucking', failure to respond to the gas pedal, loss of power, and difficulty steering. At that time, the check engine light also went on (it had not been on previous to the event starting). I was able to get the car off the highway, where it completely died - it would not move. It was towed. Mileage at this time was 1,330 miles - the car was 2 months old. It was diagnosed that "Cylinder #3 fuel injector is stuck open causing drivability issue". The likelihood that I would have been hit, by another car on that multi-lane highway with cars at high speed, and hurt or even killed is extremely high, if not certain. I did not file a report with NHTSA about the first incident (I was not aware of this service.) Incident #2: On 12/7/24, while I was again on a six lane highway, high speed traffic, night darkness, rain, and rush hour level traffic, the car began to fail in the exact same way as in 2023, 'bucking', failure to respond to gas pedal, slowing, difficulty steering, etc. I was able to get off the highway before it completely 'died'. It was undriveable and had to be towed. There was no warning light prior to the event occurring. Mileage at the time was 21,091. The probability, considering the rain, the dark, and the fact that I was on a 'super highway', that I could have been hit, hurt or even killed is extremely high. The diagnosis was 'TSB indicated #3 Fuel Injector be replaced." I do not have any of the old fuel injectors. In addition, I routinely - multiple times a week - have small children in this car. These events could have happened when I had a carful of small children with me. My routine schedule means there was also the high probability of others being hurt.

Since I have had the car, I would have to check my invoices for exact mileages, I have changed my brakes 4 times now. I only have 40k miles on the vehicle. This is very bizarre to me since I have owned a 2020 Hyundai sonata SEL convenience prior to this and never once changed the brakes. I have also changed my rotors once, resurfaced them another then, and I am in the process of changing them again. Now to this day, my calibers are shot. They will take 2 months on back order to come in from Korea. Maybe Hyundai needs to look into N lines in specific as I have read many people complaining about the same thing. It's 40k miles and I am just now needing to change my rear brakes, seems pretty reasonable. Something is very wrong with this car.

For like the fifth time while I'm driving the car just dies. I can be going 55 I can be going 70 and the dashboard lights up like a Christmas tree and the car just dies. I have to pull the car over to the side and I have to turn it off and restart it again. And then about 3 days later the check engine light will go away. This seems like a software issue but Hyundai and my local dealer cannot help me I'm going to get killed in this thing. I can't take it on the highway I can barely take it down the street because it could go out on me while I'm driving and I could be in the middle lane and I could get killed. They tell me they can't replicate the issue but it's a software issue somebody needs to do something before I get killed. Every single light on the dashboard turns on and the engine just dies. This is like the fifth time this has happened. I think this car is a lemon but no one will help me.

On 4 occasions in the last 4 months when I push the gas my cars rpm will go up but the car does not accelerate. This has happened twice on the interstate when trying to merge with trsffic and twice in city traffic, once when making a lefthand turn across oncoming traffic and once just driving down the road. I have taken the car to 2 separate dealerships for a total of 3 times and they drive it a few miles and tell me they can't duplicate the issue. I just picked my car up today after leaving it for 6 days. On my way home the emergency breaking system activated for no reason slowing my car down on the interstate. Both of these issues could get me or someone elas killed. I have not even had this car for 2 years and I am afraid to drive it. Please help. I know I am not the only person with this issue because I can see others on the internet who also have been told that the dealership can't dupe the problem. Even the dealership I just picked it up from said they had another car there with the same problem that they can't duplicate so there is nothing they can do.

While driving on the country side, my car engine stopped providing power to the car and started making some noise. The engine rpm would fluctuate and increase due to downshifting but there was no power. Luckily, the car had some speed around 50 mph, the road was slightly downhill and nobody was behind, managed to coast to a gas station half a mile away. The engine shut itself off after the car stopped. I was able to restart the car but it would shut itself off within 2 seconds of restart. Car was towed to the dealership and I was told that it had a faulty injector. The injector was replaced a week later and I received my car back later.