Power Train Problems of Hyundai Santa Fe - part 1

The ongoing safety defect affecting my leased 2025 Hyundai Santa Fe. This summarizes the facts as discussed, the danger this defect presents, and the urgent need for resolution. Summary of the defect since leasing the vehicle, it has intermittently and without warning decelerated to a complete stop (0 mph) while driving, regardless of the speed at which I am traveling — including at approximately 30 mph on local roads and at approximately 65 mph on I-95. The specific facts of this defect are as follows: the vehicle decelerates to a full stop within approximately 5-10 seconds of the malfunction beginning, with no advance warning. After the vehicle stops, attempting to accelerate again takes approximately 30-45 seconds before the vehicle begins to move, and it does so only slowly. When this occurs, the vehicle beeps and a flashing green “off limits” light appears. No check engine light or other diagnostic warning is triggered at any point. This has occurred approximately 25 times since I leased the vehicle. On the last three occasions I reported this, Hyundai/dealership personnel drove the vehicle and were unable to duplicate the problem. As I have repeatedly explained, the defect occurs intermittently and unpredictably, so this is not evidence the problem does not exist. The danger this defect presents I want to be direct about the severity of this situation. A vehicle that decelerates to a complete stop without warning — whether on a local road or on a highway at 65 mph — creates an immediate risk of a rear-end collision, a multi-vehicle accident, or worse. The fact that the vehicle then takes 30-45 seconds to regain even slow movement compounds this danger, particularly in moving traffic. This is not a comfort or inconvenience issue; it is a significant, stressful, and potentially deadly safety defect, both for me and for any passengers in my vehicle, as well as for other drivers on the road.

See all problems of the 2025 Hyundai Santa Fe 🔎.

Driving at highway speed, vehicle stuttered/lurched. The check awd, engine light, tire pressure warning lights came on. Check by mechanic resulted in error code p0741 (torque converter clutch circuit performance or stuck off). Search of error code p0741 indicates that there is a technical service bulletin TSB-23-at-005h regarding this known problem. A stutter or lurch of the vehicle can cause the driver to over react, stop or swerve suddenly in traffic potentially causing an accident not to mention possible being struck on the side of the road while waiting for a tow/service truck. Vehicle/components have not been checked by manufacturer--only diagnostic code by mechanic. Warning lights after incident included the awd system, check engine light, and tire pressure sensor light. Vehicle is being towed to a Hyundai dealership as mechanic advised it is not safe to drive.

See all problems of the 2019 Hyundai Santa Fe 🔎.

My 2023 Hyundai Santa Fe calligraphy has experienced transmission problems since it was new and currently has approximately 20,000 miles. I brought it to the dealership approximately three to four times for these concerns, but I was told they could not find a problem or any diagnostic codes. Recently, while driving on the highway, the vehicle lost power and would not accelerate even with the accelerator pedal pressed all the way down. I had to pull over to the side of the highway. Without turning off the engine, I shifted into park and then back into drive. The vehicle began moving again, but the transmission continued slipping. On [xxx] I brought the vehicle to key Hyundai of manchester for scheduled maintenance and again reported the recurring transmission problems. The dealership requested a diagnostic fee of more than $200, which I declined because I had repeatedly reported this problem since the vehicle was new. They completed the scheduled maintenance without performing the requested transmission diagnosis. After leaving the dealership that same day, the vehicle repeatedly malfunctioned while I was driving, and the check engine light came on. I returned to the dealership. A scan showed three fault codes related to the transmission, clutch, and a sensor. I asked to leave the vehicle and receive a loaner because I feared another loss of power on the highway could cause a rear-end collision. I was told the person who could authorize a loaner had left for an appointment, could not be contacted, and that I should return Monday. On [xxx], I called and spoke with anthony, whom I was told was in charge. He told me I needed to bring the vehicle in and would have to join a waiting list for a loaner. On [xxx], I brought the vehicle back, and it is currently at the dealership being evaluated. My primary concern is safety: recurring transmission slipping and a loss of acceleration that left me unable to maintain speed on the highway. Iinformation redacted pursuant to the freedom of information act (foia), 5 u. S. C.

See all problems of the 2023 Hyundai Santa Fe 🔎.

Was driving down road car went into limp mode about caused a big wreck, check engine was flashing and heard a loud noise as I was trying to get to safety. Had the car scanned and was for code p1326 and looking at all the recalls nothing is for the 2. 4l but y'all have been having a lot of issues with these theta 2 engines.

See all problems of the 2017 Hyundai Santa Fe 🔎.

After we had the Hyundai 9c2 recall completed a few weeks ago, we immediately had rough shifting in our Hyundai Santa Fe sport driving off the lot. Problem has continued since, and is most notable after cold start/once the car has sat for an extended period of time. Hyundai has released a drivability information on 5/18/26 regarding the known issue, but our dealership was unaware. The dealership recommended replacement of the transmission, despite my explanation that the issue began after the installation of the recall fix.

The vehicle has been having ongoing issues with loosing power and lagging when accelerating. It is most predominate on hot days, although still happens at other times. The dealer can not reproduce the issue nor see there is a problem in the computer scan. They say the "lagging" they see is within normal limits. This has been in numerous times to be looked at, nothing is ever found. Finally a transmission error, "transmission error, check transmission oil immediately", came on and my car shut down. The car was towed to dealer. Dealer stated there is no problem with the car. The error did not show up on the scan, very preromantic, it should have showed up. Luckily I took a picture of the error. This is a life safety issue that should be addressed before someone pays with their life.

See all problems of the 2024 Hyundai Santa Fe 🔎.

On September 20, 2026, my 2021 Hyundai Santa Fe calligraphy suffered sluggish acceleration while operating on a public roadway due to an internal dual-clutch transmission (dct) failure. The malfunction indicator light illuminated, and a diagnostic scan revealed stored history code p1c2d03, indicating a total breakdown of the high-pressure electric pump assembly. As of September 21, 2026 the vehicle is currently grounded at an authorized Hyundai dealership under an approved factory warranty repair prior authorization (PA) request. However the dealership has issued a written admission of "no eta" because the replacement transmission components are on an indefinite national backordered and are no longer being manufactured . Because the vehicle cannot be repaired in a reasonable timeframe due to a severe factory design defect , it remains unresolved.

See all problems of the 2021 Hyundai Santa Fe 🔎.

Ref: case number with Hyundai USA #43287419. On 11th September 2026, my car (2024 Hyundai Santa Fe awd, limited trim - just covered 24,000 miles) suddenly shown an error/problem on the cluster as 'shifter system malfunction), while driving on road, which caused panic, that the car was behaving weirdly in the middle of the road with traffic. After keeping the car at dealership garage for more than 2 weeks, last Tuesday on 29th September 2026, I got back the car after repair. Again on last Sunday, 04th October 2026, the same problem appeared & towed again back to the dealership garage for repair. Since, it is an unpredictable existing problem with the car, kindly consider this case with NHTSA with utmost priority as my family consists with 1 year twin babies too, which I am all concerned. Already because of the recalls with this car, as a family we are going through a lot, with the known common & random issues with the system. With NHTSA I feel comfortable with the concern, because NHTSA speaks on the basis of safety & Hyundai speaks on the basis on deals/bussiness. When contacted Hyundai, they speaks like this issue is a unique issue, as if 2024 Santa Fe is a perfect car with no issues at all, & Hyundai will go through with the issue. Latest update now, they say it's electrical problem. If known with the issue, I wonder why this drama for & just confirm & fix the issue well & permanently. The car is at Hyundai dealership garage for repair & don't know how it may take another long days, to make a safe car permanently. Please take my concern with utmost priority, that this issue when repeated I am worried now, that what happens when the problem appears in the middle of traffic with my babies. I am still making monthly payments for a burden, which I am bound to carry because I bought this car. Thank you NHTSA for the pateince in going through my concern.

I am filing an urgent complaint against Hyundai motor America for a direct violation of the national traffic and motor vehicle safety act. The manufacturer is actively refusing to honor and execute the mandated remedy for federal safety recall 263 (NHTSA campaign 24v-529). My 2024 Hyundai Santa Fe xrt suffered an immediate transmission failure, throwing dtc p086800, which is the precise fail-safe error logic covered under this safety recall. When escalated to Hyundai motor America corporate consumer affairs (case #xxx), a corporate case manager issued a formal written denial. The manufacturer explicitly stated that the safety recall remedy would not be covered because the vehicle is "past its 10-year/100,000-mile warranty period". This denial is legally fraudulent. Under federal law, safety recalls do not carry mileage, time, or warranty status restrictions. Furthermore, my vehicle is a 2024 model year, making the manufacturer's claim of it being "over 10 years old" a clerical impossibility. Because my vehicle is a primary tool for my livelihood as a rideshare driver, this unlawful denial has caused extreme, compounding injuries. The vehicle entered limp mode and was rendered entirely undrivable. Hyundai's refusal to provide a loaner vehicle or repair the safety hazard has completely cut off my ability to earn an income. As a direct result of this prolonged corporate delay, I have suffered sudden job loss and immediate housing displacement, rendering myself and my family homeless and stranded in the state of [xxx]. I have suffered greatly having to sleep on the streets due to this non-compliance. I request that the national highway traffic safety administration immediately investigate Hyundai motor America case management for systemic compliance violations regarding recall 263, and compel the manufacturer to replace the failed transmission assembly immediately at zero cost information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The contact owns a 2024 Hyundai Santa Fe. The contact stated that while stopped at a red light, after the light turned to green, the vehicle stalled and became inoperable. The contact waited for several seconds and depressed the accelerator pedal before the vehicle returned to normal operation. The contact associated the failure with NHTSA campaign number: 24v529000 (power train); however, the VIN was not included in the recall. The dealer was contacted but was unable to duplicate the failure. The manufacturer was contacted by phone and made aware of the failure. The failure mileage was approximately 12,000.

I own a 2023 Hyundai Santa Fe calligraphy awd equipped with the 2. 5l turbo engine and 8-speed wet dual-clutch transmission. At approximately 39,900 miles, the check-engine light illuminated. Hyundai bluelink diagnostics reported powertrain/tcu diagnostic trouble code p1c2d03, identified as a high-pressure electric oil pump motor position sensor fault. I am concerned because this same diagnostic trouble code and high-pressure electric oil pump/transmission issue was associated with Hyundai safety recall 236 (NHTSA recall 22v746) involving certain earlier Santa Fe model years. Hyundai's recall documentation described the possibility of the transmission high-pressure electric oil pump malfunctioning and causing loss of motive power while driving. My vehicle is a 2023 model and therefore was not included in that earlier recall, but Hyundai has subsequently issued technical service information covering 2021–2023 Santa Fe vehicles equipped with the 2. 5t engine and 8-speed wet dct, including vehicles displaying dtc p1c2d03. The current Hyundai service procedure indicates that affected vehicles may require transmission replacement. I have stopped driving the vehicle because of my concern about a possible loss of propulsion and have scheduled an appointment with a Hyundai dealership for diagnosis. At this time, I have not experienced a loss of motive power or an accident. I am reporting the issue because a 2023 vehicle outside the original recall population is displaying the same fault code associated with the previously recalled transmission condition. I believe NHTSA should evaluate whether the affected population should include additional model years.

Component/system failed: engine assembly (theta ii 2. 4l gdi) and exhaust/catalytic converter. Description: the vehicle suffered a failure associated with the known theta ii engine defects. Engine oil consumption and internal engine wear directly led to unburned fuel and debris entering the exhaust stream, resulting in severe catalytic converter restriction/failure. Safety risk: the combined failure caused sudden loss of power while driving, engine stalling, and significant driveability hazards, creating an immediate risk of a rear-end collision on public roads. Confirmation & inspection: the failure was confirmed and diagnosed by a certified service facility. Replaced components and diagnostic documentation remain available for inspection upon request.

While driving on a highway at approximately 60 mph, the vehicle abruptly suffered a catastrophic loss of power and entered "limp mode," creating a severe safety hazard on the roadway. The vehicle was safely maneuvered and pulled over to the side of the road. Upon shutting the vehicle down and attempting to restart it after a few minutes, the powertrain completely failed to engage, refusing to shift into either drive or reverse. The vehicle became entirely disabled and required a flatbed tow to the dealership. ?dashboard warning messages: - ?"transmission control system" - ?"check hybrid system" ?diagnostic trouble codes (dtcs): - ?p177700 (transmission / hybrid powertrain control malfunction) - ?p178400 (transmission control system / electric oil pump or actuator circuit fault).

Our vehicle does this all the time and has done so for almost two years. After starting the vehicle and then shifting to a gear, either drive or reverse. The vehicle does not always go into gear. When you take your foot off the brake to push on the accelerator, the vehicle will start to roll in the opposite direction if you are on a very small incline in the opposite direction. If you are on flat ground, the car will not move for a few seconds. If the incline is in the direction of your selected gear, you start rolling in that direction with no power from the transmission. In one to three seconds you get power to the transmission. This happens at any time of the day, from the very first start up, to anytime during the day when in use. If you stop to get gas and when you restart the vehicle it can happen. We have almost hit other cars and people several times from rolling backwards when we have drive selected because the transmission does not properly engage. Everytime it happens I say to the car, why are you doing this? the only reason we haven't hit anyone or another car is because I hit the brakes again very quickly once we start rolling backwards after we do not start going forward. Not sure if it is associated or not, but driving through the parking lot a few times in drive. We have lost all power to the transmission. You are driving along and without any visual indications or sounds, you just start slowing down. If you press on the gas more, it does nothing to increase the speed of the vehicle. It has only happened once to us on a road going 45 mph. The power came back after a few seconds.

My car is consuming an immense amount of oil, the manufacturer recommends oil changes every 7,500 miles, I get an oil change less than 3,000 miles and on my last oil change I was told that there are oil shavings in my oil filter. I just got the sc9c2 update and now my engine is knocking. Car drives super rough and has signs of rod bearing failure. My engine is the theta ii 2. 4gdi, a class action lawsuit was filed against Hyundai but my car wasn't included. I don't understand how Hyundai can know about this issue with this engine and not cover replacement. A car should at the very least last for the life of the loan, I am going to end up with no car and still making payments.

See all problems of the 2020 Hyundai Santa Fe 🔎.

On 3 separate occasions the vehicle has suddenly quit going. Twice going through an intersection after taking off. The third time going up hill near my house. The car would only go 10 mph. A message would come up on the dash that reads " transmission system error, check transmission oil immediately. That was not the problem. The Hyundai dealership performed a recall update on the computer the first time. But that didn't solve the problem as a week later the same thing happened . Again the car was towed to the dealership. This time another transmission service was performed according to a tech line information. After retrieving my car from the dealership I drove it for less than a week and the same thing happened. The car was towed back to the dealership again. Now the dealership says they can't do any repairs as the computer will not store any malfunction codes so they will know what to repair. I have been in contact with Hyundai motor America and a case file has been established. " 43176412 ". Hyundai will not accept any responsibility for placing a computer in a car that will not retain a mil code. Hyundai now tells me they have done all they can and for me to get my car from the dealership and drive it. That is ridiculous. Hyundai wants me to put myself in danger of having a wreck because the car loses power in front of traffic behind me. People start slamming on brakes to keep from hitting me and blowing their horns. I'm also afraid of some loose cannon out there having road rage at me because I can't get out of the way. As for the car and Hyundai , no mention of the shortcomings of the computer was mentioned until the 3rd time the car was towed back to the dealership. Also, there is some type of serious problem with the transmission which Hyundai is failing to be concerned with . This is a dangerous situation. Do I need to be seriously injured or worse before Hyundai addresses this issue ?.

My vehicle recently received the Hyundai 9c2 emissions upgrade they required and since then the vehicle has had predictable acceleration issues for the first several minutes after the vehicle. While trying to slowly accelerate the vehicle with unpredictably lurch forward. Many people have been reporting this.

Known as an issue with Hyundai, but unresponsive to correct because no diagnostic code is sent. Transmission will shift extremely hard from 1st to 2nd gear randomly. In keeping track of the mileage, this appears to happen every 200 miles or so. Also, it faild to upshift correctly, making the entire car shudder. Also, at times it will not go into reverse gear. On one occasion, after finally doing so, it slammed so hard into reverse I almost collided with the car behind me.

2024 Hyundai Santa Fe VIN [xxx], June 2024 build, 62k miles. Vehicle experienced total loss of power and drive, matching NHTSA recall 24v-529 / 263 for dct failure. Dealer is refusing to perform recall, refusing to provide diagnostic codes via email, and demanding title and all service records before any work. Dealer claims new engine needed but won’t provide proof. This is a safety defect and dealer is violating recall law. " information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Bought this as a used vehicle with around 77k miles. The SUV was running fine for a little while until I drove onto the highway. It eventually began to bog down and there was hesitation and jumping instead of acceleration. This continued my entire trip home with the check engine light on. The car was only driven for about 300-400 miles in the time I had it. When I brought it to have an oil change, they found metal shavings in the oil. From what I’ve been reading, this has been a common problem for this vehicle. It has been sitting in a Hyundai service center for at least a month now with no real responses from Hyundai themselves. They told me they would not fix the problem due to lack of maintenance from prior owners and that they were marking my title (doesn’t make sense since I bought this with a clean title). According to what Hyundai told me, this issue was brought up by a previous owner in January 2026 with no repairs. How can you change the status of my title while refusing to repair a problem caused by a manufacturers defect?.

See all problems of the 2018 Hyundai Santa Fe 🔎.

Symptoms are those described in Hyundai recall 236 (delayed shifting,hesitation, stalling). Vehicle has had multiple tsp services at Hyundai but symptoms persist intermittently. Software updates do not fix issue. Hyundai dealer has no other remedies.

See all problems of the 2022 Hyundai Santa Fe 🔎.

While operating the vehicle, the vehicle suddenly began severely hesitating and stalling. During the incident, engine rpm surged to approximately 6,000 rpm and accelerator pedal response became abnormal. The vehicle was not responding normally to accelerator input, which significantly affected the ability to operate the vehicle safely. The vehicle subsequently recorded diagnostic trouble code p0304 – cylinder 4 misfire detected. The abnormal operation of the vehicle during the incident was also captured on video. The vehicle was taken to an authorized Hyundai dealership for diagnosis. The dealership has advised that because the condition is not currently occurring and they have been unable to duplicate the problem, they may be unable to diagnose or repair the vehicle. The safety concern is not simply an illuminated check-engine light or a stored p0304 code. The concern is the combination of severe hesitation/stalling, abnormal accelerator response, and the engine surging to approximately 6,000 rpm while the vehicle was being driven. The cause of the condition has not been identified and, at the time of this complaint, the vehicle has not been repaired for the underlying problem. I am concerned that this condition could recur without warning while accelerating, entering or crossing traffic, or traveling at highway speeds. A recurrence could result in an inability to accelerate normally, unexpected vehicle behavior, loss of normal vehicle operation, or a collision. Hyundai has been notified of the issue and I have requested further technical investigation of the engine misfire as well as the transmission/tcu and electronic throttle/accelerator systems due to the high-rpm event and abnormal accelerator response. I am submitting this complaint because this appears to be a potentially serious safety-related defect and I want NHTSA to have a record of the incident and determine whether similar stalling, high-rpm, acceleration, transmission, or engine-misfire.

Cold-start hesitation & rough shifting: following the 9c2 ecu update, my vehicle is experiencing a brief period of throttle hesitation, rough shifting, or jerky transmission behavior specifically during cold-start operations.

Update odi complaint number: 11759237 subsequent actions and manufacturer refusal to remediate safety defect: ?following the [xxx], acute safety incident—where the vehicle lost motive power and entered severe limp mode on [xxx] immediately upon release from sheehy Hyundai of chantilly—the vehicle remained in dealer custody for 11 days (August 20–August 31, 2026). ?failure to diagnose core defect: despite recurring total power loss, active diagnostic trouble code p00af00 (turbocharger boost control module performance), and four consecutive turbocharger destructions within 20,000 miles, the authorized dealership refused to conduct internal engine diagnostics, drop the oil pan, inspect the oil filter, or perform borescope checks. ?physical contamination documented: on August 29, 2026, an on-site physical inspection confirmed sparkling metallic particulate suspended in the engine oil on the dipstick and substantial oil blow-by/intrusion into the turbocharger air intake line. ?formal denial of safety/warranty coverage: on August 31, 2026, dealership management and Hyundai motor America (consumer affairs case #[xxx]) formally denied warranty assistance and refused engine teardown under the theta ii lifetime engine warranty settlement. Coverage was declined citing "outside influence" due to an aftermarket turbocharger assembly, while Hyundai refused to investigate the underlying engine failure contaminating and destroying the forced-induction system. ?evidence preservation: on August 31, 2026, the vehicle was towed to an independent facility to mitigate road hazards, conduct teardown diagnostics, and preserve the engine oil/filter for iso-accredited spectrographic laboratory analysis. ?the manufacturer released an unsafe vehicle into traffic on August 20, 2026, and subsequently refused to investigate or remedy a documented internal engine failure that creates sudden, recurring loss of motive power. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The vehicle suffers from recurring, sudden loss of motive power and transitions into engine "limp mode" while driving in active, heavy traffic. This severe drivability defect has occurred on four separate occasions under diagnostic trouble code (dtc) p00af00 (turbocharger/supercharger boost control "a" module performance) and related boost/map faults (p0234). During these episodes, the vehicle abruptly loses acceleration capability without warning, creating an acute collision risk when navigating highway traffic and intersections. The turbocharger assembly has required replacement three separate times due to recurring oil contamination from the engine crankcase. Despite meticulous maintenance (documented synthetic oil changes every 3,000–5,000 miles since new), the manufacturer and dealership have repeatedly blamed peripheral turbo components rather than diagnosing or repairing the root cause (I suspect excessive engine crankcase pressure/piston ring blow-by based on the significant oil deposition on the turbo, map sensor, and pooling in the intake line).

Vehicle was brought to an authorized dealership for service, and while there campaign 9c2 (ecu software update for theta ii emissions improvement) was performed. Immediately following this software update, the vehicle developed drivability degradation, specifically engine stutter/hesitation and rough transmission shifting during cold starts. When attempting to accelerate in the first few minutes of driving, the vehicle delays engagement and then suddenly surges or lurches forward unpredictably. This creates a safety hazard, as the unpredictable power delivery and lag prevent the vehicle from accelerating safely when merging into traffic or turning across oncoming lanes, placing occupants at an immediate risk of a collision. The software logic error is fully reproducible every time the vehicle has sat long enough to cool down. The dealership confirmed the update was applied. There were no warning lamps or symptoms prior to the 9c2 update; the failure was caused directly by the manufacturer's campaign software modification to the engine control unit (ecu). The vehicle and its ecu are available for inspection upon request.

On multiple occasions the error “transmission system error check transmission oil immediately” have taken vehicle to dealership 3 separate times. Believe entire unit to be faulty.

1. Component/system failure & availability: the failed component is the engine's internal camshaft variable valve timing (cvvt) phaser backing bolt within the 3. 3l v6 engine assembly. An internal factory bolt unthreaded, backed out, and physically pierced directly through the upper valve cover. The vehicle and intact failed engine are currently located at an authorized Hyundai dealership service center in [xxx], and remain fully available for immediate physical inspection by federal investigators upon request. 2. Safety risk: an internal engine bolt unthreading and puncturing through the valve cover creates an extreme safety hazard. A high-velocity metal bolt piercing the engine casing causes immediate engine seizure, sudden loss of motive power at highway speeds, loss of power steering/braking assistance, and massive pressurized oil discharge directly onto red-hot exhaust manifolds, posing a severe risk of sudden catastrophic vehicle fire and multi-vehicle highway collisions. 3. Dealer/independent confirmation: yes. The failure was formally inspected, reproduced, and confirmed by an authorized Hyundai dealership service department. Dealership technicians logged official diagnostic findings under prior authorization case #xxx. 4. Inspection by manufacturer/others: yes. The defect was inspected and escalated directly to Hyundai motor America (hma) corporate engineering. Corporate engineering officially verified the defect and issued techline case #xxx, confirming that an internal factory cvvt backing bolt unthreaded and pierced the valve cover, recommending a full engine replacement. 5. Warning lights & prior symptoms: there were no prior warning lamps, check engine lights, unusual sounds, or advance warning symptoms prior to the failure. The internal hardware failure occurred suddenly and without warning while operating the vehicle at standard operating parameters. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2016 Hyundai Santa Fe 🔎.

My 2017 Hyundai Santa Fe, purchased new from lynnes Hyundai in February 2017, has approximately 93,000 miles. The vehicle previously developed a significant oil-consumption/engine problem that was diagnosed by Hyundai, and Hyundai replaced the engine with a remanufactured engine. Approximately two weeks after the engine replacement, the check-engine light illuminated and dtc p1326 was identified. The dealership replaced the knock sensor. Approximately two weeks later, the check-engine light illuminated again with a recurring p1326 condition. The vehicle is currently at lynnes Hyundai and has been there approximately three weeks while they attempt to determine the cause. Hyundai techline is involved. Prior to the current repair visit, while traveling approximately 60 mph, the vehicle experienced a very forceful hesitation that jerked the vehicle. I immediately slowed down and pulled onto the shoulder. The vehicle continued to hesitate intermittently while I drove slowly to safety. I was concerned that the vehicle could lose power or shut down while I was driving at highway speed, creating a risk of a crash. The recurring p1326 condition has been confirmed by the Hyundai dealership. The vehicle and engine have been inspected by Hyundai/lynnes Hyundai multiple times, including after the engine replacement. The current recurring condition has not been resolved. The check-engine light is the warning lamp associated with the current condition. I do not know the underlying cause of the recurring p1326 condition; Hyundai is currently attempting to diagnose it. The vehicle is currently available for inspection at lynnes Hyundai.

Auto had a very strong gas smell after arriving at work. Check the engine and underneath the car for leaks but no fluids on the ground or my garage. Smell persisted while out of town and made appointment for inspection. The dealer service man said it was suffering numerous leaks and we’re awaiting parts. Latest info was still leaks present and would advise after making certain no leaks persist.

What component or system failed or malfunctioned, and is it available for inspection upon request? the vehicle suffers from an intermittent, total engine stalling and propulsion failure. Without warning, the engine completely shuts down while driving and automatically drops the vehicle into "accessory (acc) mode". The vehicle is fully intact, operational when it restarts, and is available for immediate inspection upon request how was your safety or the safety of others put at risk? this issue has occurred five total times in live traffic, severely risking the safety of the vehicle's occupants and surrounding drivers. The most recent and dangerous incident occurred on the freeway in heavy, stop-and-go traffic. A sudden, complete loss of power on a high-speed freeway leaves the vehicle entirely vulnerable to rear-end collisions, as it leaves no room or momentum to safely coast to the shoulder. Has the problem been reproduced or confirmed by a dealer or independent service center? no. The vehicle has been brought to an authorized Hyundai dealership five separate times specifically to diagnose this exact stalling issue. Because the failure is intermittent, dealership service technicians have been unable to replicate the problem during their test drives or resolve the root cause. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? the vehicle has been inspected five separate times by authorized Hyundai dealership technicians during the service appointments mentioned above. No police, insurance, or independent manufacturer representatives have inspected the vehicle yet, as the stalling has not yet resulted in a physical crash. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear?there are absolutely no dashboard warning lights, check engine indicators, error messages, or mechanical symptoms prior to the failures. The engine shuts down instant.

Hyundai motor America & wallace Hyundai of stuartvehicle: 2020 Hyundai Santa Fe (2. 4l theta ii gdi engine)VIN: 5nms23ad5lh181669incident mileage: 181,000 mihyundai case number: 42981944section 1: catastrophic interstate safety incidenton July 16, 2026, while navigating heavy, high-speed traffic on interstate 95 (I-95) at approximately 80 to 85 mph, my vehicle suffered an un-commanded, catastrophic mechanical engine seizure. The vehicle instantly dropped from highway speeds down to a 21 mph "limp mode," creating an immediate multi-car pile-up hazard on a major interstate. Physical inspection immediately after the failure proved that the engine oil level was completely full. The internal components catastrophically failed due to a documented, systemic factory defect involving premature rod bearing failure and oil starvation mechanisms, entirely unrelated to consumer maintenance. Section 2: prior safety complaints & documented timelinehyundai motor America has intentionally forced me to operate a known, life-threatening safety hazard for 17 months, during which I drove an additional 31,000 miles under extreme duress. I filed formal oil consumption complaints with Hyundai corporate every three to four months. I was forced to manually replenish the engine oil every 1,000 miles due to excessive oil loss. Specific safety reports detailing hazardous engine behavior were formally logged with Hyundai on November 25, 2025, and again in April 2026. Rather than remediating the vehicle, Hyundai corporate claims adjusters and dealership supervisors ignored these warning tracks, effectively throwing a consumer out into active traffic in an unsafe, defective vehicle. Section 3: automatic shutdown trauma & accident riskthe manufacturing defects caused an intermittent, un-commanded automatic the manufacturing defects caused an intermittent, un-commanded automatic engine shutdown condition. On 5 to 10 separate occasions while stationary at active traffic lights, the vehicle stalled10times.

I purchased a 2024 Hyundai Santa Fe sel with 16,087 miles that has a the 8-speed wet dual-clutch transmission (dct) stutters to catch gear properly while accelerating from low speeds and back to high, example driving onto a highway ramp and matching speeds with ongoing traffic). Unfortunately, there have been multiple fears and risk of safety where accidents almost occured due to the transmission not catching the engines rotational speed to exact, causing slow to no acceleration. This is very dangerous and unsafe to not be considered under investigation. This unresolved issue will deteriorate the clutch and transmission itself over time. Help!.

I am currently burning through 2. 5 quarts of oil approximately every 800 miles.

I was merging onto the highway and the acceleration stopped working and the vehicle would not go more than 25 mph. Had to restart car in shoulder, isue seemed to self correct but then it happened 10 minutes later stranding me in between the highway and exit ramp. This was a huge safety issue and myself and others lives were at risk. I am bringing the vehicle in for inspection but this seems to be a recurring Hyundai issue. There were no warnings that came on. The auto mode on the dash went from green to an amber color. When I restarted the vehicle nothing changed. After the second time it occurred a check engine light came on.