Power Train Problems of Hyundai Sonata - part 2

Vehicle's engine seized completely at 75 mph on the interstate. No warning lights or abnormal noises were present before catastrophic failure, and the car has been serviced recently. Cel came on at time of failure, throws code p1326. Car rapidly/dangerously decelerated, would have crashed if not driving in the leftmost lane of travel.

See all problems of the 2014 Hyundai Sonata 🔎.

All documents are attached as it is many separate incidents that ended knock from motor and minutes later, a piston shooting through the engine block which is what made the car inoperable.

See all problems of the 2017 Hyundai Sonata 🔎.

The car in recent months has twice lost power and been rendered in operable on the side of the road until it could be limped home. I had the car serviced last year for a recall of a fuel filter gasket and at that time I was informed that I also had an update done for a (k knock?) sensor prior done on the car before purchase. I inquired about what that was, and they told me at the time it was for an engine recall because that particular engine I have is known to have rod bearing failure and consume oil without any trace of where it goes and piston rattle. I told the gentleman after my fuel gasket was taken care of that I would like to look into that because I have the symptoms and would like to know. At that point in time, I was told that I may have to do an oil test to see if the car loses oil. I said well can we do that and he told me it's $300 out of pocket. I asked on average before anything ever done by Hyundai, how many times do people have to do this? he said 4 to 6 in his experience. I told him I did not have the money, but I will keep an eye on the car. Everything's been fine for six months a few months ago randomly driving to work the car shut down on me. We got the car home and my fiancé did an oil change and new spark plugs and the car worked fine. June 9th 2025 on my way to work the issue happened again in the middle of traffic. I called my fiancé and we got the car home. He performed another oil change and spark plug replacement and took pictures this time because the spark plugs are gunked up. The car now runs again. He called Hyundai of America on my behalf to just ask them if they could set up the test to see if the car was failing and they told him that they were all independent Hyundai and he would have to pay the test fees. He told them in a formal email that he doesn't believe under the federal recall he is responsible for that and they answered back that he may be reimbursed. We are contacting you because we were advised to on the issue.

See all problems of the 2018 Hyundai Sonata 🔎.

The contact owns a 2013 Hyundai Sonata. The contact called to report a technical issue with a Hyundai technical service bulletin and the software that the manufacturer was reprograming for the Hyundai transmissions; TSB number: 13-at017. The contact, a certified mechanic, purchased a 2013 Hyundai Sonata from a customer due to the transmission failure. The contact attempted to order a new transmission from the manufacturer, but no transmission was available. The contact ordered a compatible transmission from kia. The contact successfully installed the transmission. The installation instructions which stated that the motor control unit and transmission control unit software needed to be reprogramed. The contact was able to successfully road test the vehicle and then had the vehicle towed to a dealer. The contact stated that after the software was reprogramed, while attempting to road test the vehicle, immediately there were several unknown warning lights illuminated. The contact checked online and determined that the TSB issued by Hyundai for the software reprograming outlined temperature values that were not the values show on the testing equipment. The contact called the dealer and was informed that using the kia transmission in a Hyundai vehicle, there was no assistance to be offered. The contact diagnosed the vehicle and determined that the Hyundai software was incorrect and wanted to notify the NHTSA of the failure. The vehicle was not repaired. The manufacturer was informed of the issue. The failure mileage was not provided.

See all problems of the 2013 Hyundai Sonata 🔎.

Dear sir/madam, I am writing to file a formal safety complaint regarding a dangerous incident involving my Hyundai Sonata hybrid (VIN: [xxx] ) and Hyundai motor America’s failure to fully correct the issue. Incident summary: while driving on the freeway, the vehicle suddenly displayed the following alarming warnings: “hybrid system warning! safely stop and do not drive” “check charging system” immediately after these messages appeared, the car lost all power and shut down in the middle of the road. I had my two young children (ages xxx and xxx) in the car, making the situation extremely unsafe and traumatic. The vehicle lost all mobility and provided no opportunity to safely pull over. After contacting Hyundai corporate multiple times, a case manager was eventually assigned to my case. At Hyundai’s request, I towed the vehicle to autonation Hyundai valencia for diagnostic evaluation. The dealership diagnosed the issue as error code p0a78, indicating a transmission failure. Hyundai corporate offered to cover 60% of the repair cost, leaving me responsible for the remaining 40%—an amount that exceeds the current value of the vehicle. This proposed resolution is not reasonable considering the severity of the safety risk and the vehicle’s low mileage. My primary concern is that this is an extremely dangerous defect, as the vehicle loses all power without warning, leaving the driver unable to move the car to a safe location. Requested actions: a formal investigation into the safety and reliability of Hyundai’s hybrid systems, specifically in 2014 Sonata hybrid vehicles. A determination of whether this defect qualifies under Hyundai’s warranty or federal safety defect regulations. Full compensation from Hyundai corporate to cover 100% of the repair costs to correct this serious safety issue. Thank you for your time and attention to this critical matter. I look forward to your prompt response and appropriate action. Information redacted pursuant to the freedom of information act (foia), 5.

Engine failure. Definitely a safety issue, check engine light flashing, limited engine power. Wouldn’t accelerate. Dealer inspected, there is a nationwide recall and class action lawsuits and they won’t replace even though it’s under warranty. False information saying maintenance neglect on my part. That is false. Known failure and oil consumption. Rod bearing failure.

Formal complaint – hybrid system failure, safety risk (VIN: [xxx] | Hyundai case #[xxx]) dear sir/madam, I am writing to file a formal safety complaint regarding a dangerous incident involving my Hyundai hybrid vehicle (VIN: [xxx] ) and Hyundai motor America's failure to respond meaningfully to repeated requests for assistance. Incident summary: on [xxx], while driving with my two young children (ages [xxx] and [xxx] ), my vehicle suddenly displayed the following critical warnings: “hybrid system warning! safely stop and do not drive” “check charging system” immediately after these messages appeared, the car lost all power and came to a complete stop in the middle of the road. This created an extremely hazardous and distressing situation for me and my family. Although the vehicle is a few years old, it has very low mileage (38,345 miles), and I did not expect such a catastrophic failure. I submitted a report to Hyundai customer support on may 30, 2025 (case #[xxx]) and followed up on June 9, 2025, but have only received an automated acknowledgment—no response, investigation, or support to date. Attachments: a video clip showing the warning messages at the time of the incident (I cannot upload the video clip since the option is not there, but I do have it if required) requested actions: a formal investigation into the safety and reliability of Hyundai's hybrid systems. A determination as to whether this incident qualifies under Hyundai’s warranty or federal safety defect regulations. Immediate contact from Hyundai with the next steps regarding inspection, resolution, or compensation. I am cc’ing Hyundai motor America to ensure this matter is escalated appropriately and receives the attention it warrants. Thank you for your time and consideration. I look forward to your timely response. Sincerely, [xxx] [xxx] [xxx] [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Vehicle suddenly accelerated after pulling out of store parking lot at low speed into side street behind vehicle stopped at light (less than a car length in front) while pressing hard on brake. Vehicle lurched forward incrementally during the braking process, but vehicle kept accelerating causing vehicle to hit stopped vehicle numerous times before vehicle engine was finally turned off. Driver of both vehicles could have been seriously hurt. Vehicle was driven home after this incident without incident but has only been driven out of garage and onto and off towing truck. Car has not been inspected except for damage to vehicle and is currently awaiting insurance rep inspection at vehicle repair facility. Once damage is repaired car will be towed to dealership for inspection. Because of the short distance vehicle traveled no warning lamps/messages were noted.

See all problems of the 2024 Hyundai Sonata 🔎.

I am filing this complaint regarding a serious engine issue with my 2006 Hyundai Sonata equipped with a 2. 4l gdi engine. My vehicle experienced [engine knocking, stalling, and then seized up indicating complete engine failure] without warning, posing a potential safety hazard while driving. The issue appears to be identical to the known manufacturing defects that Hyundai has acknowledged in its recall of 2013–2014 Sonata models with the same engine class type. Although my vehicle is not currently included in the official recall “ Sonata engine recall campaign it contains the theta ii mpi engine which constitutes and further solidifies proof of the ongoing manufacturing defects of theta model engine design and exhibits the same symptoms of sudden engine failure. This raises concerns that the defect may affect a broader range of model years than Hyundai has acknowledged. I urge NHTSA to investigate this issue and determine whether the scope of the current recall should be expanded to include earlier model years such as 2006. The defect creates a significant safety risk to drivers and passengers, and Hyundai should be held accountable for all affected vehicles—not just those produced within a narrow window.

See all problems of the 2006 Hyundai Sonata 🔎.

After a dealer-installed software update on my 2024 Hyundai Sonata sel awd, the car began jerking during acceleration and shifting. This happens at low and moderate speeds and creates an unsafe hesitation, especially in traffic. This issue did not exist before the update. I believe the software update affected the transmission or engine control calibration. The dealership has not resolved the issue, and it poses a safety concern. Please investigate whether this is linked to a faulty update affecting other Sonata vehicles.

Car is in park, refuses to shut off due to car saying car is not in park.

The contact owns 2013 Hyundai Sonata. The contact stated while driving at various speeds, the gear indicator on instrument panel independently shifted. Despite the failure, the contact stated that the transmission continued to operate normally. The contact stated that several days later while at a complete stop, the vehicle hesitated while depressing the accelerator pedal and the engine revved to a high rpm. The contact called and informed the dealer of the failure. The contact was made aware that the failure was a common failure for the make and model of the vehicle. Upon investigation, the contact discovered NHTSA campaign number: 14v434000 (power train); which the contact linked to the vehicle. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 125,000.

1. I purchased this vehicle in 2016 and I have had my rear brake lights repaired several times because the rear tail lights continue to go out, this happens regularly. There is no warning lights on the dash to indicate an issue. The only way I learned that my brake lights don't work properly is another motorist driving behind me and almost rear ending me. I have had the rear brake lights repaired by the dealership before. My brakes always smell like burning rubber after driving having me to believe that the lubricant for the brake pads aren't working. 2. The dashboard lights also periodically blinks out without warning. After a few moments it will illuminate again. 3. My seatbelts sometimes doesn't tighten up. I have to pull them several times for them to catch and return after the seatbelt isn't in use.

Bought in 2023 @ 98k miles. Have had trouble with 1. It would only start in drive, then that seems to have self corrected. 2. In drive, car would not accelerate properly, and would slow as though I was braking, but no foot on brake. Had rear brake sensor replaced, seemed better for a while. 3. Developed oil leak at 120 miles which valvoline characterized as "not serious. . . Just keep checking it and topping it off. " so, have been doing that. Today after oil change, it began running rough, lots of vibration, then the shifting problem, sluggishness, and new. . Smoke from under hood on driver's side. No check engine lights at all. Nothing registered as hot or overheating. Turned off car, checked oil and trans fluid, both in proper range for warm engine. Let car sit and cool for an hour. Decided I had parked too close to the propane tanks for a smoking car, so I decided to start car just to back it into a space across the lot. Car had no issues- no smoke, no jerking or vibration, no sluggishness, no phantom braking. This car has done this same thing about once every 6 months since I've had it. Changed a tire sensor, that seemed to fix it once. Stopped using cruise control altogether, that seemed to help once. My brother is an ase certified high school auto mechanics teacher who ran his own shop for 20 years and worked on trucks for vdot for another 7 years and he cannot diagnose it. I know it has something to do with not being in the correct gear, but it's not reliable, and I have a hard time believing it's just my vehicle.

See all problems of the 2008 Hyundai Sonata 🔎.

My 2020 Hyundai Sonata has a recurring defect in its engine or transmission, causing sudden deceleration to ~10 mph without warning, often on major highways, with warning lights (check engine, esc, traction control, etc. ) flashing seconds before the car decelerates. This forces me to swerve off busy roads, endangering me, my passengers, and other drivers. Near-misses with traffic pose an extreme safety risk, causing significant emotional distress. The car, at a Hyundai dealer since April 21, 2025, is available for NHTSA inspection. The issue began in January 2021, five months after purchase, with all the warning lights appearing during incidents along with rapid deceleration. The Hyundai dealer confirmed the problem in seven repair attempts (January 2021, December 2021, January 2022, November 2024, February 2025, and twice in April 2025) but never properly diagnosed or fixed it, citing no consistent diagnostic codes. Only the dealer assessed it; no inspections by Hyundai’s manufacturer, police, or insurance occurred. In November 2024, the defect recurred immediately after pickup, despite false assurances it was fixed. In February 2025, the dealer kept the car over a month with minimal communication, yet it failed again. I picked up the car on April 4, 2025, but it broke down on April 6, less than 55 hours later. I returned it April 7 and picked it up April 17, and it failed again on April 21, 2025 with the vehicle remaining at the dealer since. The dealer and Hyundai offer no solution and this dangerous issue keeps recurring. Similar NHTSA complaints suggest a broader issue. Rapid recurrences—hours after April 4 and four days after April 17—prove the car is unsafe and assurances of repairs are untrustworthy. I no longer trust the Sonata or Hyundai’s repairs, as the defect persists.

See all problems of the 2020 Hyundai Sonata 🔎.

The car went into limp mode they have problems with the knock sensor and that is what it threw to the computer and I changed the sensor and went away and now limp mode again and computer says basically the same thing there is a software update and the engines are failing.

My 2020 Hyundai Sonata has a recurring and dangerous defect involving sudden deceleration while driving. Without warning, the car abruptly slows to ~10 mph—often on the highway—while numerous dashboard warning lights activate. This poses an extreme safety risk to me, my passengers, and other drivers, as it forces me to maneuver off the road to avoid being hit. The issue began in January 2021, just five months after I purchased the car new. It has occurred repeatedly and unpredictably since then. I have taken the vehicle to Hyundai-authorized dealers for repair on five occasions (January 2021; December 2021; January 2022; November 2024; and February 2025), but the problem has never been properly diagnosed or fixed. In November 2024, the issue occurred immediately after I picked the car up from the dealership when they told me it was fixed and ready to drive. This most recent occurrence (February 2025) before tonight's incident on April 6, 2025, the dealer had my vehicle for over a month. During this time, communication was seldom initiated by the dealer. Now the problem recurred less than 55 hours after picking the vehicle up from the Hyundai certified dealer, who told me the issue was fixed and the car looks and runs great. Unfortunately I found myself in this dangerous situation despite the dealer's reassurances and Hyundai's involvement overseeing the repair process. The unsafe, defective Sonata is currently in my possession as I figure out next steps. Each incident is accompanied by multiple warning lights (e. G. , check engine, esc, etc. ) but the dealer represents that no consistent diagnostic codes have been found. I’ve also found multiple similar complaints from other Sonata owners on the NHTSA site, suggesting this may be a broader issue. This unresolved defect has made the vehicle unsafe to drive and caused significant emotional distress. I no longer trust the car or the assurances from Hyundai or the dealer that it is fixed.

So my car started to stall when I started it an when I started goin down the road like it wanted to die. Then I started to smell gas very strong so had a code tester put to my car an I have 6 permanent codes. An not only that im smelling oil strong an noticing big oil spots under my car. So I look under the hood an behind the turbo I see oil behind an underneath the turbo. I definitely didnt feel safe driving but now its not even drivable. I purchased it couple months ago from an individual an I cant belive the amount of problems this car has. Im a single mom an trying to support my family an its hard to now with a non running car. I've put quite a few parts hoping it would fix some of the problems an nothing has. I absolutely love the car an very beautiful but unfortunately to many problems with it. Eninge, gas leaks, timing.

The check engine light light is on now giving code p200a I was driving and the center console shut off and the engine died I had to pull over and start the car again it started but the check engine light light is on now for a p200a I’ve looked it up and everything I can find says there is a recall but my car isn’t in it so what can I do I don’t want to cause a fire or an accident because my car messed up o. Me.

Similar to other stories I’ve read online, my 2023 Sonata broke down on the highway a minute after any error signal popping up, in a dangerous location on the highway with no shoulder. Plaza Hyundai dealership was first/last and only people to perform an oil change or service the car. They told me they wouldn’t take the car due to being full after the incident. A different Hyundai dealership took the car and found the breakdown was due to a missing oil drain plug and the engine leaked all the oil, while noting they didn’t do the previous oil change and there was no external damages. Plaza Hyundai is refusing to claim responsibility and just trying to milk me for much money as possible/get me to purchase a new engine.

See all problems of the 2023 Hyundai Sonata 🔎.

My 2018 Hyundai Sonata (approx. 60,000 miles) began consuming excessive oil, and the engine started smoking while driving. My wife barely made it to the dealership — the car was unsafe, struggled to stay running, and visibly smoked from under the hood. Hyundai acknowledged the oil issue but refused to cover engine replacement. Instead, they approved a one-time combustion chamber cleaning and requested we drive the car 1,000 miles to "see if it gets better. " this is a major safety concern. The vehicle is part of a group of Hyundai models known to have defective theta ii engines that have led to engine failure, fire risk, and recalls. This issue is widespread, and Hyundai is not taking proper responsibility for defective engines in cars like mine.

While traveling on local roads and highways the vehicle transmission randomly down-shifts one or two gears. This has occurred when traveling in any gear from gears 3 through 6. It probably doesn't happen in 2nd gear because that is a transitory gear and not a cruising gear. After quickly moving the shifter from automatic mode into manual mode and then back into automatic mode the transmission returns to the proper gear. However sometimes it has down shifted again in as little as 30 to 60 seconds after resetting the shifter. This has been happening for years. The dealership has been unable to fix it. Because it is random, the issue is not readily reproducible by the repair shop. Sometimes it has happened several times within a 15 minute period. Sometimes it has occured multiple consecutive days. Other times a week or two has passed with no incident.

See all problems of the 2015 Hyundai Sonata 🔎.

The affected component is the engine/rod bearing (theta ii 2. 4l). My 2011 Hyundai Sonata stalled and the engine locked up twice in live traffic (March 2025 and July 2025). The vehicle is available for inspection if needed. This created a serious safety risk to me and others on the road, as the stall occurred on [xxx] at highway speeds. This failure could have been catastrophic had it happened on the DC/baltimore beltway or another high-traffic roadway. Hyundai’s system shows recall 132 was marked complete at very low mileage (around 32,000 miles), but my vehicle later developed oil consumption and stalling consistent with rod bearing failure. Capitol heights Hyundai noted a warranty pre-authorization (PA) in March 2025 and told me Hyundai needed my mailing address “for the claim,” but later said it was a typo and that no record exists. The dealership charged me for a diagnostic but did not inspect the vehicle for rod bearing failure, despite symptoms consistent with recall 132. Annapolis Hyundai, where the car was purchased as a cpo, has admitted they have no documentation that recall 132 was ever performed (no repair order, mileage, or technician notes). Yet Hyundai’s system shows recall 132 marked “complete. ” without proof that the ksds software or bearing inspection was done, I belive this recall should be considered open. Hyundai consumer affairs has stated that I must pay for towing and diagnosis before they will investigate, with possible reimbursement later. This conflicts with federal law (49 u. S. C. § 30120), which requires recall diagnosis and repair at no cost to the consumer. Prior to the failures, my vehicle had a history of oil consumption and “no oil on dipstick” findings, which are known precursors to rod bearing failure. No warning lamps appeared before the stalls. I am requesting NHTSA’s assistance in requiring Hyundai to provide documentation or reopen recall 132 and perform a no-cost inspection/repair to ensure this vehicle is safe to operate information redacted pursuant to the freedom of.

See all problems of the 2011 Hyundai Sonata 🔎.

I was going 80 mph on the interstate and suddenly my car went into limp mode and shooked really hard and dropped to 60 mph. I had to swerve to go onto the side of the road. The car behind me almost rammed into me. I contacted hampton Hyundai for days to schedule an appt. I finally was able to drop off my vehicle to them but now they are telling me they have to do an oil consumption test but my car is in limp mode and it shakes when I drive it. The car is dangerous and they are trying to charge me $500 for a fuel pump replacement ( which I have a warranty of but they notified me that does not count but it matches exactly the possible reason). As you can see in the documents, they did not note that my fuel pump was broken. They just asked if I wanted to pay it so they can get started. I get normal oil changes done. They haven't even done a rod bearing test but just looked at the knock sensor and was telling me that they wanted to charge me to get that changed.

I purchased a 2019 Hyundai Sonata se in December 2024. Within one month, the vehicle consumed 3. 5 quarts of oil out of a 5-quart capacity. After researching the issue, I discovered that this is a known engine defect covered under Hyundai technical service bulletin 23-em-008h, which relates to excessive oil consumption. This condition can lead to engine failure, posing a significant safety risk if the engine fails while driving at high speeds or in traffic. This issue is part of an active class-action lawsuit and has affected numerous vehicles with the same engine type. I am reporting this defect so that the NHTSA can track the scope of the problem and determine whether a recall should be issued.

See all problems of the 2019 Hyundai Sonata 🔎.

I had an issue on my car where engine oil level is getting low day by day, then I have visited service center to solve they have said to change spark plug, pcv value and also done fuel induction service , said me to come after 1000 miles then after I had a another problem where my car rpm is increasing and speed is getting low. I have visited the service center again saying catalytic converter issue and asked me to pay 3000$ to do repair before that I have paid 700$ but mentioning you one thing till now I have spend 2000$ for the same issue what was happen. Today as now my car is issue to move in toll road it is very hard to move. And also Hyundai is denying my request and saying me I am out of warranty. My car has 94000 miles as for today. Please help me out from this I am struggling with the issue.

My certified pre-owned 2020 Hyundai Sonata has experienced the same critical transmission failure three times since October 2024, creating dangerous safety conditions on highways and city streets. Component/system failed: transmission control system with consistent p0768 error code (shift solenoid d circuit fault). Safety risks: the transmission failures cause sudden power loss and inability to accelerate while driving, including on highways at speed. This creates immediate danger to myself, passengers, and other drivers when the vehicle unexpectedly loses power during traffic situations requiring acceleration or merging. Problem reproduction: the failure has been confirmed and reproduced by authorized Hyundai dealership three separate times: - [xxx]: p0768 error, replaced shift control solenoid valve - [xxx]: same p0768 error returned, replaced entire transmission control unit - [xxx]: same p0768 error again, replaced complete control wiring harness with extensive dashboard removal warning signs: each failure was preceded by transmission hesitation, rough shifting, and check engine light activation before complete power loss occurred. Manufacturer inspection: Hyundai technical assistance case #[xxx] was opened for the third failure, acknowledging the recurring nature of this defect despite multiple repair attempts. Assessment: this appears to be a systematic manufacturing defect in the transmission control system affecting safety. Despite three different repair approaches by Hyundai, the identical p0768 error continues to recur, suggesting a fundamental design or manufacturing flaw that creates ongoing safety risks for drivers. The vehicle was out of service for 44 total days across these three incidents, indicating the severity and complexity of this recurring safety defect. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

My 2020 Hyundai Sonata has a recurring and dangerous defect involving sudden deceleration while driving. Without warning, the car abruptly slows to ~10 mph—often on the highway—while numerous dashboard warning lights activate. This poses an extreme safety risk to me, my passengers, and other drivers, as it forces me to maneuver off the road to avoid being hit. The issue began in January 2021, still with less than 4,000 miles and just five months after I purchased the car new. It has occurred repeatedly and unpredictably since then. I have taken the vehicle to a Hyundai-authorized dealer for repair on five occasions (January 2021; December 2021; January 2022; November 2024; and February 2025), but the problem has never been properly diagnosed or fixed. In November 2024, the issue occurred immediately as I drove off the dealer's lot, having been assured the vehicle was repaired and safe to drive. The most recent visit lasted over a month, yet the dealer could not replicate the problem and returned the car to me in early April 2025, without a clear resolution. The vehicle is currently in my possession and available for inspection. Each incident is accompanied by multiple warning lights (e. G. , check engine, esc, etc. ) but no consistent diagnostic codes have been found. I’ve also found multiple similar complaints from other Sonata owners on the NHTSA site, suggesting this may be a broader issue. This unresolved defect has made the vehicle unsafe to drive and caused significant emotional distress. I no longer trust the car or the assurances from Hyundai or the dealer that it is fixed.

Car lost power going up a hill. Generating codes p1326, p0455 and p0302.

See all problems of the 2016 Hyundai Sonata 🔎.

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.

When I was driving on highway check brake warning came up with hybrid system warning I wasn’t be able to stop or accelerate I slowed down and pulled over might caused a big accident.

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.

Our 2015 Sonata has experiencing engine failure several times due to excessive and irregular oil consumption. Our family’s safety and the safety of others on the roadway were put at risk as the engine slows, shudders and stalls without prior warning and the check engine light does not come on until the vehicle slows and stalls. The vehicle was inspected at a local Hyundai dealership, and they indicated that this is not covered under warranty. Summary of engine issues and failures: 1. May 3, 2022 – 68,671 miles (local Hyundai dealer) check engine light on, shudder; oil change performed. No cause identified. Paid out-of-pocket. 2. August 23, 2022 – 75,527 miles (retail shop) car engines failed on highway, towed to service shop. Valve cover gaskets replaced. Paid out-of-pocket in part and extended warranty paid part of the invoice. 3. April 29, 2024 – 109,229 miles (local Hyundai dealer) excessive oil consumption noted; valve cover gasket replaced again. Paid out-of-pocket. 4. January 22, 2025 – 118,341 miles (local Hyundai dealer) vehicle stalled en route to airport, towed to dealership; dealership advised oil change. Paid out-of-pocket. 5. May 20, 2025 – 122,000 miles (local Hyundai dealer) engine codes p0300, p0302, p0303 identified. Dealer diagnosed excessive oil consumption likely due to ring wear or sticking rings, contributing to spark plug misfires. Recommendation: engine replacement. Despite consistent and timely service, including multiple visits to the Hyundai dealership, the root issue has not been properly addressed. The current diagnosis of internal engine failure is a clear continuation of a pattern of unresolved engine problems (stalling in motion, oil leaks and oil consumption) all of which originated well within Hyundai’s original warranty. The vehicle has been well maintained, and all recalls have been addressed in a timely manner. Hyundai’s failure to acknowledge and take responsibility for this widely documented engine issue is a safety concern.

My vehicle had the following symptoms: 1. Alternating between sluggish acceleration/handling and rough acceleration with the vehicle lurching forward at times 2. Check engine light with error code p00010 3. Occurred frequently over a one month period (5+ times) this was unsafe as the car could not properly accelerate and would lurch forward at intersections. This could easily have led to a crash. We limited driving. This issue was observed at the dealer where I repaired issue. The issue is exactly the same as the issue described in the recall for Hyundai Sonata 2015 under sb-10058136-4434 and was resolved by replacement of the e-cvvt seal as described. This issue is ridiculous for me to deal with and put my family as risk given it a known issue for Hyundai in their other vehicles.

The engine stalls when driving, loses power, hard time to start. It uses an extensive amount of oil. Losing power/stalling can result in accident or fire in my engine. Yes check engine light came on said it was coils/plugs changed them 2xs already. Took it to a mechanic was told there’s a recall on engine it’s a valve that is not getting air through that can potentially case a fire in my engine.