Power Train Problems of Hyundai Tucson - part 2

The contact owns a 2025 Hyundai Tucson. The contact stated while driving 24 mph, the vehicle shuddered abnormally. After releasing the accelerator pedal and slowing down, the shuddering ceased. There were no warning lights illuminated. Additionally, the auto stop/start feature failed to activate as designed. The vehicle was taken to a dealer where it was diagnosed and determined that the electric oil pump needed to be replaced. The vehicle was repaired but the failure persisted. The dealer then diagnosed the vehicle and determined that the transmission needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 15,000.

The contact owns a 2023 Hyundai Tucson. The contact stated while driving approximately 45 mph, the accelerator pedal was depressed while merging onto a highway, but the vehicle lost forward momentum. The contact stated that the message "limited to 20 mph" was displayed on the instrument cluster. The contact depressed the accelerator pedal, and the vehicle failed to respond as needed. The contact stated that the engine was not revving. The contact pulled off the highway and into a parking lot. The contact turned the vehicle off and on, and normal driving was resumed. The contact stated that the failure was intermittent and was occurring while accelerating. Additionally, the contact stated that upon starting the vehicle in the morning, the vehicle would jump forward while still in park (p). Additionally, the contact stated that the horn had stopped functioning after the last loss of forward momentum but had returned to normal function a few days later. The vehicle was taken to a local dealer, however, the dealer was unable to duplicate the failure. The vehicle was not diagnosed or repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 26,500.

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While starting and accelerating my 2018 Hyundai Tucson, I began hearing abnormal engine knocking and noticed rough performance. I took the vehicle to an authorized Hyundai dealership, where they diagnosed an internal engine defect. They confirmed the engine issue but refused to cover the repair, citing that I’m not the original owner—despite public information stating that Hyundai’s extended engine defect warranty (related to known bearing failures) applies to all owners for up to 15 years/150,000 miles. This creates a major safety concern, as I drive long distances on highways daily and fear the engine may seize or fail at high speeds. The vehicle remains at the dealership and is currently undrivable. I’ve submitted proper maintenance records, and the issue has been escalated through Hyundai consumer affairs and the better business bureau. This appears to be a widely reported engine defect that Hyundai is not consistently addressing. The lack of coverage and delay in resolution places drivers at unnecessary risk.

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When sitting at a stop and then accelerating to leave the stop position, the car will go and then all of a sudden it will stall out and I'm pressing the gas pedal, pressing the gas pedal quite a few times before the car even decides to move. This happens when I'm changing lanes on the highway. . . Merging onto the highway. . . When I'm leaving from a stop sign or a stoplight it happens continuously. It is very dangerous and it can cause a very bad accident. . . . This has been an issue since I had bought the car 3 years ago. . . It seems to be happening more frequent.

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On [xxx], my husband and I were driving on [xxx] (highway) in the slow lane, when the engine shutoff without any service engine light warning. It was frightening because an tractor trailer was directly behind the car as we lost power. There was no sounds of engine parts knocking or pinging when the problem occurred. The only thing was observed was (two) 2 puffs of smoke seen from the tailpipe, witnessed by my son who was following behind in his vehicle. The vehicle was not able to start after shutdown and had to be towed to my home. We purchased a new battery after assuming battery failure--with no resolve. The vehicle was towed to(two) 2 repair shops with the same conclusion: seized engine after checking open recalls on my vehicle, I contacted Hyundai to check for assistance. The vehicle is now at the Hyundai dealership in mcdonough, georgia for inspection. I am thankful that my husband and I were not injured or laying in a morgue after this frighten ordeal on the highway when the engine suddenly shutoff/seized. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2015 Hyundai Tucson 🔎.

While merging onto [xxx] in southington, CT, the vehicle would not accelerate past 25 mph which is very dangerous for merging onto an interstate highway. Luckily, my wife was able to safely pull over onto the shoulder. We shut the vehicle off for a minute, restarted it, and have had no problems since. There were no warnings, and no check engine indicator was displayed. I'll contact the dealer this month at a regular maintenance visit. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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On April 12, 2025, my 2018 Hyundai tuson which only has 99,000 miles started stalling out at random speeds. The vehicle stalled going up a hill and would not accelerate it would also not go past 55-60 miles per hour on the highway. There were no check engine lights or codes on the dashboard. The vehicle is also burning oil on 2 occasions when having the oil changed. I feel like my life and others is in danger because the vehicle is stalling at random speeds which could cause a major accident due to this issue. I could be hit by another vehicle while trying to accelerate or merge on the highway. I reported the oil consumption last November and I contacted Hyundai customer care who issued a case number in may 2025 for the stalling issue, they instructed me to take it to the Hyundai dealership to be diagnosed. There is a recall out, but they said my vehicle is not included in it. I took the vehicle to the dealership, and they confirmed the vehicle was stalling and would not accelerate and were able to reproduce the issue. They informed me the vehicle needed a new transmission, and the vehicle only has 99,000 miles. Hyundai and the dealership declined to add the vehicle to the recall campaign for stalling vehicles. I had to cover the cost of $3,000 for a new transmission. I picked the vehicle up on June 6,2025 with the new transmission installed and it is still stalling and won't accelerate past 45 miles per hour.

I’ve been having ongoing issues with my 2016 Hyundai Tucson where the car struggles to accelerate, especially after stopping at red lights or pulling out into traffic. Sometimes, when I press the gas pedal, the car either hesitates badly or doesn’t move at all. A few times it’s completely stalled while trying to make turns or cross intersections, which has been really scary and dangerous. I did some research and found there was a known recall for this exact problem related to the transmission control module software and the dual-clutch transmission. The symptoms described in the recall match mine perfectly, but when I checked my VIN, my vehicle isn’t included. I haven’t taken it to the dealer yet because I’m worried I’ll have to pay out of pocket for something that I believe is part of a known manufacturer issue.

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Car is burning oil. Oil change done at 3k and no oil in vehicle at all. Transmission shakes violently on start up and first movement and slips shifting gears. No response sometimes when pressing gas pedal to go.

See all problems of the 2017 Hyundai Tucson 🔎.

The engine uses about 3 to 4 quarts of oil before a oil change the it will go in limp mode. I have to get it rest and then add oil for the engine to run right. Also transmission don't want to shift 3 to 4 gear it will be 35 mph to 65 before it shifts. When the car goes in limp mode I lose power going up a hill and almost got rear ended. They won't do anything do to its a used car. No lights came on the dash till it acts up.

There is a significant issue for engine oil consumption that may cause the engines to seize up and require repairs and or replacement. To that end the vehicle purchased has a 15 year 150,000 mile extended warranty included. The vehicle is now in for additional repairs related to the same issues and verification if a new engine will be required.

See all problems of the 2019 Hyundai Tucson 🔎.

The transmission failed, and it's only at 70k. This was only diagnosed after being told that my dual clutch was faulty. I had that replaced, only to be told that my actuator was faulty and not the clutch, after haviing paid for the replacement. Now, the vehicle will barely move with rpms through the roof. So not only was ithe vehicle misdiagnosed twice, the cost of repairs was sky high! this could have been avoided. I contacted the dealerships, at they advised that they did everything as Hyundai instructed them. Well, Hyundai was wrong, and now my vehicle doesn't even work.

See attached document for complaint.

Over the past nine months, I’ve been experiencing ongoing issues with my 2018 Hyundai Tucson engine and transmission. After four consumption tests and a flush confirming that the engine is burning between 0. 8 and 0. 3 liters of oil for every 1,000, I was informed Hyundai refuses to either repair the issue or conduct testing to determine the cause. The timeline is summarized below: •February 2025 – I was told by [xxx] my vehicle simply did not have enough oil after the last oil change; •March 2025 – I was informed an initial consumption test needed to be completed; •may 2025 – a second consumption test revealed the engine was burning more than 1 liter per 1000 and a flush was completed; •July 2025 – a third consumption test was completed, revealing that while the engine was excessively burning oil, it was not currently at 1 liter per 1000 based on that test; August 2025 – the oil light came on & I was instructed to put a liter of oil into my vehicle to make it to the certified dealer for next steps. The next steps were another consumption test. Unfortunately, because I was told to add oil to make it to the dealership, I was then informed that this added oil would alter the testing, and we had to start over. •September 2025 – I am now awaiting the results of the fourth consumption test. I have receipts for every 6 months or 7,500 of service since purchasing the vehicle. , despite the engine and transmission being under warranty, the dealership has refused to conduct testing to determine the cause of the issue or remedy the excessive consumption. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

?? NHTSA complaint description (modify as needed) ?? safety issue: I purchased a brand-new 2025 Hyundai Tucson hybrid on March 3, 2025, and within 5 minutes of driving and less than 20 miles, the vehicle stalled three times on a busy highway without warning. ?? component/system failure: the vehicle suffered a complete power loss, rendering it undrivable in the middle of the highway. The gas pedal became unresponsive, and I had no control over the vehicle’s movement. ?? immediate safety risk: the sudden stalling on a highway put my family and other drivers at serious risk of a collision. We were left stranded for over 3 hours while waiting for assistance. The vehicle was inspected by Hyundai’s roadside assistance and later towed to the dealership. ?? inspection & confirmation of the issue: the dealership and Hyundai’s technical team later diagnosed the issue as a failure in the electric oil pump and the oil pump control unit. Hyundai has not provided a clear resolution and is pushing for repairs, despite the vehicle failing immediately after purchase. The manufacturer and dealership have not provided a pre-delivery inspection report confirming whether the vehicle was defective before delivery. ?? no prior warning signs: there were no warning lamps, error messages, or any prior symptoms before the failure. The issue occurred suddenly and repeatedly within minutes of taking delivery of the vehicle. ?? request for investigation: given the severity of this mechanical failure and its potential to cause serious accidents, I am reporting this to the NHTSA for further investigation. This issue needs to be addressed immediately before it leads to a fatal accident for another Hyundai Tucson hybrid owner.

My catalytic converter failed at roughly 70k miles (confirmed by mechanic and replaced). I have now been having transmission issues ever since, starting with the rpms jumping up on their own when trying to downshift (reproduced by mechanic) and ending with the car fully going into limp mode while in the middle of driving on the highway at speed. The former never triggered a light or produced codes, and with the latter the cel flashed three times at the very start of the breakdown, and then went off and never came back on, despite the obvious problems the car was having.

Vehicle has 36,300 miles. Engine stalled twice when shifting into reverse, mid displayed "bcw on, check system. " continued driving home, vehicle experiences power loss (rpms drop to ~500) and electrical system sputters and sparking noises can be heard in the cabin momentarily when turning left or steering left for curves at speeds over ~20mph. Checked bcw sensor location in rear bumper for obstructions - vehicle is clean.

-auto start/stop "feature" since there is no way to permanently disable this feature I forgot that it was on. While stopped a stop light I was unable to move when the car behind me could not stop due to the wet roads. If the car behind me was unable to swerve in time I would have been rear-ended. By the time the engine started the car behind me was in line with my back seat. No amount of gas saving is worth being immobilized essentially in a emergency situation. - forward collision avoidance is way too sensitive, in the same trip as above a car hit their brakes approximately 6 car lengths in front of me to turn into a parking lot. The car in front of me did slam on their brakes to make the turn. As I took my foot off the gas to slow down the "safety feature" activated, applied my brakes and almost caused the car behind me to rear end me. I was going roughly 45 mph and the car behind me was roughly 2 car lengths behind me when the "safety feature" activated. The sensitivity of this system is way too high and will wind up causing more accidents then it prevents.

2022 to Hyundai tuscon now with the third cylinder misfire due to faulty fuel injector. This can be inspected upon request. Upon second occurrence, requested all cylinders be replaced and advised could not do this under warranty. Second filing to NHTSA. This incident put myself and other drivers at risk. I was driving on a highway and the cylinder misfire occurred resulting in check engine light and vehicle going into limp mode and inability to drive more than 30-40 mph. The entire vehicle violently shakes and loses power with this misfire. In the previous occurrences , could not accelerate beyond 20 mph. I could have been rear ended or caused a serious accident on the highway as a result of Hyundai faulty fuel injectors and cylinder misfires. My vehicle has now been seen 3x for the same issue and replaced by dealer. There were no warning signs prior to the failure of the fuel injector resulting in cylinder misfire and loss of power and inability to accelerate. This is a very dangerous faulty component of this year make and model- it is a known issue. Still no recall. I have a "new" car that puts me in danger every 4-6 months when I lose power in my vehicle with no warning or cause except from faulty parts. This faulty part is going to cause serious injuries/accidents if it is not addressed.

The check engine light became flashing and the vehicle went into limp mode while occupied by two adults and one minor child as they were merging to access the freeway.

See all problems of the 2020 Hyundai Tucson 🔎.

1. "transmission or ecu" 2. There is a lag and sometimes almost stall when accelerating from a stop. I was turning into a lane from a stop sign and the car decided to not move for 3-4 seconds after pressing accelerator. If people had come around the blind corner when that happened I would have been t boned. 3. All four people living in my house. . . . . . And our mechanic. Yes 4. No, because were not paying for something that has had a recall. 5. We inherited this car from my grandmother and she knows nothing about cars so she never thought anything was wrong. Since the day we got it, it has been doing the same thing "dct control logic update & p0128 dtc logic update (recall 149)" #17-01-023.

The safety alert system on the vehicle alerted us five different times that the vehicle needed to be parked and checked immediately due to a powertrain issue and each time we took it to the dealership because it is still under warranty at 47,984 mi. This last time they have had it for just over 3 weeks and said there are three or four of the same vehicle with the same issue that they are trying to get parts for. This is not coming up as a recall, but it has been an issue with safety because it tells us to immediately park the vehicle and it loses engine power when accelerating which is very dangerous for navigating traffic. Insurance has not been involved as it is on warranty and there has not been an accident because of this issue yet. Please look into this because we do believe there should be a recall on this model. I know other people who are having the same issue with the same type of vehicle but on the santa fe. The issue starts out where they say it's just a gas cap. But then switching out the gas cap doesn't fix the problem.

The transmission in my vehicle failed while driving and the car completely shut off while driving. Less than 4 months after replacing the transmission with a brand new transmission, the engine failed while driving on the highway. The engine started sputtering, then it started smoking, then the car stalled.

On Jan 5th, with odometer reading of 1747 miles, while driving on a busy highway, the car's speed decreased until the car stopped without warning. After pushing the car into a gas station to get out of harm's way, we contacted Hyundai roadside assistance. The car was towed to a nearby Hyundai dealership. The problem was diagnosed the next day - the car needs a new transmission. The transmission is on backorder and will not be delivered to the dealership until the middle of March. Our new 2025 tuscon hybrid will be out of service for at least 10 weeks after breaking down on a major road without warning. The code is the bluelink app is p177700 -powertrain transmission.

There is an intermittent problem with the transmission. It’s impossible to predict when the transmission will slip. When navigating traffic, it has happened multiple times trying to pull out across oncoming traffic, and the transmission begins slipping so badly in a couple of instances nearly causing a side impact. There are no recalls related to this, but the dealership confirms it is common… the fact that it is intermittent makes it worse. You get used to the transmission performing as it should… next thing you know it slips when you can’t afford for it to slip. .

1. December 2024: Hyundai dealership diagnosed my transmission as defective (unable to shift properly) and recommended a full replacement. Despite this, they assured me the vehicle was "safe to drive" without disclosing risks. - unedited dealer text: "the tech said he doesn’t think it will break down or leave you stranded, he just can’t get it to shift correctly. " - no warnings were given about prolonged use, highway driving, or potential failure. 2. Post-repair damage: after relying on Hyundai’s advice, the transmission worsened, causing additional damage (e. G. , radiator failure). 3. Recall negligence: my VIN was wrongly excluded from recall 16v-628 (transmission control issues), despite exhibiting identical symptoms. They didn't cover repairs, despite their technician confirming the defect. The safety impacts are as follows: - sudden loss of power while driving (e. G. , inability to accelerate or shift). - increased crash risk due to erratic transmission behavior. - Hyundai’s failure to warn put me and other drivers in danger. I am requesting: - investigate why my VIN was excluded from recall 16v-628. - force Hyundai to reimburse repairs and extend recall coverage. - require Hyundai to issue clear safety warnings after faulty repairs. Attached is the following: - the radiator repair invoice. - proof of text from Hyundai. - proof of my VIN being excluded from recall. - quote for my transmission repair.

I am writing to report a serious issue with my 2017 Hyundai Tucson sel 2. 0 that poses potential safety risks. The vehicle is consuming more than 4 quarts of oil every 1,000 miles, which is far beyond normal and acceptable levels. The car has approximately 166,000 miles on it and has been regularly maintained, including timely oil changes. Despite proper maintenance, this excessive oil consumption leads to frequent low-oil warnings, risking sudden engine failure if not continuously monitored. This creates an unsafe driving condition, particularly on highways or during long trips, as the engine could seize without warning. Additionally, I am aware that many other owners of Hyundai vehicles with similar engines have reported comparable issues. This suggests a widespread defect in the engine design or manufacturing process. I am requesting the NHTSA to investigate this matter further to determine if a recall, warranty extension, or other corrective action is necessary to address this issue. Hyundai should be held accountable for resolving this problem, especially since it compromises the safety and reliability of the vehicle. Vehicle information: year: 2017 make: Hyundai model: Tucson sel engine: 2. 0l VIN: [your vehicle identification number here] thank you for your attention to this matter. I hope for a prompt investigation and resolution to ensure the safety of all Hyundai Tucson owners.

Within the first year of purchase, my power train system has beeb throwing codes. I took it to the dealership where they assured me nothing was wrong. My fuel injectors then gave out. The dealership replaced them and told me “yes these things are faulty and we see it a lot”. After replacing it, they did not seal the fuel injectors, causing gas to gush out and set my car to smoke. I was ill from inhaling gas fumes for days. They took accountability and said that the injectors were defective in the vehicles and that they would once again fix it. I am not experiencing further engine issues which they do not know how to diagnose. My car is a 2022 purchase from the lot. The engine is defective and Hyundai is negligent. They admitted they were aware of the injector issue but didn’t do much to correct this. After corrected, they almost had my car set on fire from fuel pouring on the engine.

While driving, car suddenly slowed and would not accelerate as normal with accelerator depressed. A dashboard warning "check hybrid system" appeared and acceleration was unable to power car up hill. Driver forced to pull over on shoulder. After turning off and turning on vehicle, issue seemed to temporarily resolve itself. Dealer was unable to identify any faults in the car 3 days after this incident, and returned car to owner. A week later, the same issue occurred. Car would not accelerate after stop sign. When pressing accelerator, car coasted forward a a few mph. Turning off vehicle and turning on again resulted in normal performance resuming.

See all problems of the 2024 Hyundai Tucson 🔎.

At the end of may 2024 my car was diagnosed with a faulty fuel injector that caused sputtering and problems accelerating. I was driving on a busy freeway when my car began to shake and sputter and lose power. A check engine light came on when the car first started to shake and sputter. I was able to pull off the freeway but, in an area, where I was unfamiliar. I was able contact family nearby who assisted me in driving the car slowly to a Hyundai dealership about 15 miles away. This happened on a holiday weekend and I had to get a rental car as the dealership was unable to service the car for several days. The dealership diagnosed the car as having a faulty fuel injector and a new fuel injector was installed. On December 5, my car again started sputtering and shaking and had problems accelerating. It needed to be towed to a Hyundai dealership about 50 miles away from my home. I am currently waiting for them to diagnose the problem.

I took my vehicle to my mechanic for inspection check up. My mechanic told me and supplied paperwork from their scans that the p0420 sensor in the cat converter was shot again (3x in 5 years) and needed to be replaced. The engine light had come on 3 weeks beforehand and I had it read and knew what it was. They sent me to Hyundai dealer as it was under warranty with documentation. I get to Hyundai dealer tell them it needs the sensor for inspection and an investigation for oil leaking from back of the engine. I also told them I was adding 2-3 quarts of oil between oil changes. They told me my mechanic over filled oil by . 5 quarts and that's why the engine leaked. They investigated after I disputed by saying an oil change had been performed the day I brought it to them and found a bad head gasket, fuel pump seal, and oil pan seal. They charged my extended warranty for those repairs, shut off engine light for cat converter sensor without replacing it, and made me do an oil consumption test of 1000 miles. Car was still not inspected at this point. After 35 miles check engine light comes back on. Cat converter sensor p0420. I take it back in. They tell me they won't replace it until the oil consumption test is done because they need to know if oil is coming through the exhaust pipes (it was). I complete the test and go in. They tell me engine is burning . 5 quarts of oil/1000 miles which is acceptable and as long as I complete oil changes every 5000 miles I will be fine. They then tell me if I want sensor replaced I'm 800 miles over warranty so I have to pay $2400 to replace. Called corporate they're only willing to cover half the repair as "good will" for the cat converter and was quoted $1300 by the dealer in question. Almost a month and still not fixed and still can't get car inspected because the check engine light is tripped by the p0420 sensor in the cat converter. It's the only vehicle my family has. I'm forced to pay to have transportation.

The contact owns a 2016 Hyundai Tucson. The contact stated that while driving at undisclosed speeds, the transmission started slipping while accelerating. There were no warning lights illuminated. The contact stated that the failure was related to NHTSA campaign number: 16v628000 (power train, electrical system). The contact called an independent mechanic who provided a printout of a recall. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 108,000.

Knock sensor keeps throwing codes, the car will not accelerate over 20mph and under 2000 rpms.

While sitting in stopped traffic on the interstate in the dark in the rain on 11/25/2024 my car was in drive; my foot was on the brake. Twice the car rolled away despite my attempts to brake or put the car in park (I shoved the shifter into park and the car continued to roll). I rolled into the back of a semi because I could not get my vehicle to stop. This had already been noted as a problem with 2024 Tucsons, yet your search engine tells me there are 0 unrepaired recalls for my car. I want to call this out as an unrepaired recall. I have left it with the Hyundai dealer at the moment. They tell me if they cannot make the problem happen for them they won't do anything to fix my car. This is a dangerous situation for me and for anyone with a Tucson that may have the same problem.

While driving on street lost power in traffic then a loud knocking noise. Pulled over to a mechanic shop and they told me that it was engine pulleys was bad plus 2 transmitters was bad . I only had the vehicle 4months . The dealership that sold me the vehicle I don't believe they had the car inspected tried to contact them but no reply . I believe the dealership ripped me off and I'm making payments on the vehicle, also my vehicle has not been running for 3 weeks due to the expensive repairs that is needed.

See all problems of the 2014 Hyundai Tucson 🔎.