Other Fuel System Problems of Hyundai Santa Fe - part 1

Gas needle not going down took and dropped off at lee Hyundai of fayetteville north carolina 28309 8/15/2026 picked it up 08/17/2026 they claim they drove it six miles but they didn’t told it was supposed to be that way sold we filled up when we left the dealer ship drove 78 miles needle still not moving.

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Vehicle began running sluggish, gas smell noticed. Vehicle was due for oil change, took car in for oil change to aaa and mentioned gas smell. Aaa identified gas leaking from fuel pump posing immediate safety issue that needed to be resolved.

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Over the past month, on two occasions my vehicle has emitted gasoline fumes filling my garage, and today my interior cabin smelled like gasoline. Additionally, after warming up, my vehicle experiences acceleration drop/stuttering when accelerating after idling. This happens every day. I took the car to two dealerships (san tan Hyundai and chapman Hyundai scottsdale) and they weren’t able to diagnose the issue.

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.

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Hyundai sante fe hybrid 2025 has a bad factory seal on the high voltage harness - hybrid battery connector that causes water to intrude the connector under normal conditions which can short the battery and pose a major safety issue. Hyundai is refusing warranty coverage of my shorted hybrid battery on my brand new 2025 Hyundai sante fe hybrid stating “flood” with no evidence of flood damage. My car experienced multiple p engine hybrid system faults on xxx and would not drive. I had it towed the van Hyundai carrollton on that date. They did not look at the car for over a week and it sat on their lot the entire time. On xxx they finally inspected it and claimed the car had been “flooded” and shorted the hybrid battery. The only evidence they provided was moisture in the high voltage harness. There were no water/silt lines, any other damage to any other components, and no evidence of any water anywhere else on the vehicle. The video they showed of the undercarriage only showed normal splash marks from driving. The car was never flooded/submerged. Any water/moisture found in the harness would have been due to a faulty/defective factory seal that should be impervious to water under normal operating conditions. No water/flooding/submersion damage would have been obvious of this. The dealership refused to provide any evidence and had no follow-up. One key aspect they refused to acknowledge was there was a massive rainstorm in [xxx] onxxx which was also the only rainstorm in the area in the previous 1-2 months. This happened while the car was on the dealer’s lot. The car had no issues with any water prior to being at van Hyundai. A case was opened with Hyundai corporate and the dealship also lied stating the car wasn’t in their system until xxx, which is false as I have phone records, tow records, and appointments showing the 7/10 date, so corporate overlooked that. I disagreed with the dealerships diagnosis as it was a scapegoat finding putting all blame o information redacted pursuant to the freedom of information act.

Complete unmitigated loss of acceleration and power while traveling at highway speeds, creating an immediate life-threatening road hazard. Following a warranty engine replacement and mandatory dealer software flash at clay cooley Hyundai (sherman, TX), the vehicle began experiencing powertrain communication issues. While operating the vehicle at 65 mph on the highway, the vehicle completely failed to accelerate and lost propulsion power, nearly resulting in a catastrophic rear-end collision with an oncoming 18-wheeler semi-truck. Dealership diagnostics claim "no trouble codes present," but live data telemetry confirms the high-pressure fuel pump (hpfp) is actively commanding and delivering a dangerous 1,600 psi to the fuel rail at hot idle. This abnormal fuel delivery is paired with a severe powertrain stutter in 3rd gear. Service personnel at multiple locations confirm a widespread, high volume of transmission failures and severe drivability issues specifically tied to this recent Hyundai software update. Corporate has denied repair coverage. The vehicle remains an active highway safety hazard and is completely undrivable.

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Complaint summary: [xxx] / engine thermal fire risk / warranty deception my 2019 Hyundai Santa Fe (2. 4l gdi engine) is experiencing severe powertrain degradation under the known theta ii engine defect class-action framework. On November 7, 2025, the vehicle logged a permanent diagnostic trouble code (dtc) p1326 via an independent scan, indicating catastrophic internal rod bearing wear. On xxx, the vehicle was brought to Hyundai of milledgeville for safety recall verification. Instead of executing the mandatory corporate-directed bearing clearance test (bct) to replace the failing engine block, the service department committed technical campaign malpractice. The technician forced the 9c2 ecu software update directly over the locked mechanical fault to suppress the dashboard warning lights and alter the vehicle's rom id parameter limits. When caught via a photograph of their active gds diagnostic tablet showing 7 historical system faults, the service manager provided a truncated printed report hiding page 1 and omitting the critical p1326 powertrain code count to evade a warranty engine replacement. Due to these unmitigated delays, the vehicle has suffered severe consequential safety damage. The advanced engine degradation and oil consumption have flooded the exhaust system, melting the catalytic converter substrate and triggering a new dtc p042000 (catalyst efficiency) fault immediately after the dealer visit. The extreme engine vibrations have also damaged the transmission's torque converter clutch (dtc p074100). The dealership refused a service loaner and knowingly sent a disabled consumer and an elderly passenger away in an active, failing vehicle that presents a sudden stall-on-highway hazard and a severe thermal exhaust fire risk under extreme summer heat conditions. Hyundai motor America corporate has failed to provide emergency towing or alternative mobility accommodations despite a registered corporate case file. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(.

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Latch system for fuel tank door failure.

See all problems of the 2022 Hyundai Santa Fe 🔎.

After a recall repair (campaign 9c2) was performed on my vehicle, it developed a hesitation and lack of acceleration issue that did not exist before the repair. The vehicle exhibits rough or delayed gear shifting, a noticeable lack of power/acceleration, and behavior that feels like the engine is not receiving adequate fuel. This occurs both during cold start and after the vehicle has been driven and is fully warm. I returned the vehicle to the dealership (wallace Hyundai), where the service advisor personally test drove the car with me and confirmed he could feel the hesitation firsthand. Despite this, the dealership stated no issue was found and advised warming the car up for 1-3 minutes before driving as a workaround. I tested this exact recommendation, and the issue returned even after the vehicle was fully warmed and had already been driven. Hyundai motor America's national consumer affairs department has stated this is "under review" but has also described the hesitation as "normal" cold-start behavior related to catalyst warm-up. This does not match what I am experiencing, since the issue also occurs when the vehicle is already warm, and their own dealership's advisor confirmed the problem exists. I have also noticed a decrease in fuel efficiency (mpg) since the software update associated with this recall. This issue directly affects the safe operation of the vehicle — specifically the ability to accelerate reliably, including in situations like merging onto highways or pulling into traffic, where a lack of power could result in a collision. I do not consider the vehicle safe to drive in its current condition.

I own a 2017 Hyundai Santa Fe sport 2. 4l (VIN: [xxx]). On xxx, my vehicle received campaign 9c2 (ecu software update for theta ii emissions improvement). Shortly after this update, I began experiencing a drivability issue that did not exist beforehand. Description of the issue: the problem occurs only after the vehicle has been sitting long enough for the engine to become completely cold, typically overnight. During approximately the first 1/4 mile of driving, the vehicle intermittently jumps, surges, or lurches while accelerating normally. Once the engine warms up, the symptom completely disappears and the vehicle drives normally for the remainder of the trip. There are no warning lights, no check engine light, and no diagnostic messages. The Hyundai dealer has had the vehicle for nearly a week but has been unable to reproduce the concern. Because the issue only occurs during the initial cold start and first portion of the drive, I am concerned that it may not have been tested under the same conditions in which I consistently experience the problem. I am not claiming that campaign 9c2 caused the issue, but the timing is notable because the symptom began only after the ecu update was performed. I am requesting Hyundai's assistance in determining whether: - the ecu update was installed correctly, - any required adaptation or relearn procedure is incomplete, - there are any related technical service bulletins or software updates, or - additional diagnostics should be performed during a true cold-start drive with live data recording. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Hi, my name is [xxx], I bought used hyndai santafe sport 2017 from dealership in 2020. It had around 47,000 miles on it, intitially it was running fine but after driving 2 years I discovered that engine is burning oil and after the oil change right after 1000 miles I had to add a quart of oil and it was like every two weeks. I had many srevices from dealership and other auto mechanic stores but it didn't improved. I had no choice but to keep driving the card on xxx th the engine crashed with out any sign on dashboard. There was slight noise and it increase by the way car was parked on the side road from highway. The car was towed to my local mechanic and confirmed that engine is crashed. After I had to towed to dealership and I am still waiting for their response. Now we have put 43,000 miles in 6 years (91,000) total mileage. I had bought the waranty from dealership by $ 2500 which expired in 2025 currently no warranty. My question here is that the car is still under 100,000 and engine failed. What if the dealership refuse to replace the engine. What are my leagal rights. Thanks [xxx] [xxx] [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

After the ecm recall for a software update the car would not run correctly. It jerks and and runs rough. It almost stalls when you put your foot on the gas. I took it back to the dealer and they can not get the problem to duplicate. Noone else has looked at the problem. There were never any problems with the care until the recall. The problem occurred the day I brought the car home from the ecm update.

We have a 2017 Hyundai Santa Fe sport with a refurbished engine due to a past class act settlement, we were notified by Hyundai to bring in the vehicle for service campaign 9c2 to update the engine control module (ecm) software for vehicles equipped with the (2. 4 gdi) theta ii refurbished engine, which we have. The morning after we updated the 9c2 software, after starting our car cold for the first time in the am, our car went into limp mode, shaking very badly, it would not accelerate above 20 mph, it had a lot of trouble shifting from 1st to 3rd gear and acted like it was going to stall out and then die in the middle of the road while I was in the car with my 2 children. The dealership we took it to was not able to duplicate the limp mode, but has documented that they did witness hesitation and sluggishness while test driving it. I cannot validate that it was test driven cold immediately as requested as all their test drives were done without me. Due to the vehicle not accelerating as it should normally, I feel the vehicle is very unsafe and unreliable as well. I’m willing to provide more documentation, and our car is available for further inspection. I did request the help of a Hyundai customer relations case manager who stated Hyundai is aware of all of the drive-ability issues I have stated and he said they are hoping to provide another software update, but that time frame is unknown. Dealership mechanic stated the same thing and believes our issue is related to the 9c2 update. The manufacture has not inspected the vehicle, but we would absolutely love them to if they would. There have been no check engine lights come on before or after this update, only misfire codes came up after the update which dealership has those, and since the dealership was unable to witness it going into limp mode while driving it, they could not gain the much needed data that pinpoints the exact problem. We were advised to warm up car and rev up the rpm to above 2,000 before driving.

No power till car warms up for 5 minutes. It will be jerky on highway. The gas mileage is going down drastically, I was doing 32 miles to gallon and now it's 22mpg. All this is after the recall we just had performed. I have no power trying to avoid accidents, taking off from stopping. Car smells weird now.

Took car to dealer to have oil changed on April 29, 2026 and was told they had also preformed a software update, service campaign 9c2. Everytime since that day after the car has set for a little while and the car is restarted driven it stalls and surges really bad several times lasting for several minutes. It also can do this at random at anytime but not constant like it does when first started. This is very dangerest for obvious rasons and needs to be fixed. Although there is others reporting the same problems on line and a person making the same complaint while I was wating at the dealership. They say "they are unaware of the problem and I will have to leave my car for up to three days or more to have it checked out and then they will let me know what needs to be done” and what the cost will be. I only have the one vehicle and they would not provide a loaner vehicle so needing my car every day I can not do without it. Due to the fact that Hyundai refuses to acknowlage the problem. There really needs to be a recall to have this problem fixed.

See all problems of the 2018 Hyundai Santa Fe 🔎.

After my Hyundai dealership performed a recall on emissions my Santa Fe sport started having problems on cold starts. After it has set for a few hours when I would put into gear and start to driving the car acted as though it was trying to flood out. I have to feather the accelerator and drive very carefully for at least 1/2 - 3/4 miles. This is very dangerous and make me very uncomfortable driving. I took my vehicle back to my Hyundai dealer and the mechanic told me they were waiting for a recall to the recall. How stupid!!! it has been over a month and nothing has been done to fix the problem. Please advise!.

I took my vehicle in to the dealership on April 24, 2026 for a software update after receiving notice in the mail. The update changed my auto stop/start so that it is on whenever the vehicle is started. When removing my foot from the brake the car surges forward without me touching the gas peddle. I took my hyandai back in to the dealership on may 4, 2026, and was told that the auto stop/start was supposed to now be staying on as that was in the software update. They said they could not duplicate the surging of the vehicle. It has surged strong enough to move forward, while stopped at an intersection, that it put me out two to three feet. I felt it necessary to put it in reverse and back up it was out so far. This will absolutely put others at risk as I drive and work in a downtown area with lots of crosswalks with lots of people crossing, and should vehicles be stopped in front of me, it could hit them. I can turn it off, but in the beginning it seemed to be turning itself back on. Additionally, I am not used to always turning it off because I never had to before and I don't always remember. This week, something new: when pulling off after starting the car, even if I remember to turn off the start/stop, the car is jerking forward when I depress the gas. It's like it is getting surges of gas, or like the peddle is being pushed to the floor, let off, pushed to the floor, let off, etc. I am so incredibly scared now to just drive the vehicle I've loved for over five years now. My vehicle has not been inspected by the manufacturer, police, insurance or any others. I did not know this was an option. I would love to get more information about how to go about this. There are no warnings of any kind when this occurs, which is every single time I get in it. Please, someone, tell me what I can do further. Continue taking it back to the dealership? ride with them next time? I just am at a loss and incredibly scared. I am a woman in my 60s.

My 2025 Hyundai Santa Fe hybrid awd was serviced under warranty on 4/22/2026 for a driveability concern after experiencing a loss of power while driving. The service history shows part hy35326-2m500 was replaced. On or about 5/25/2026, the same issue occurred again while driving at highway speed. The vehicle suddenly lost motive power and dropped from approximately 70 mph to approximately 30 to 40 mph, creating a serious safety risk because the vehicle could not maintain speed with surrounding highway traffic. No warning lamps, dashboard messages, or diagnostic codes appeared during the failure. The vehicle is currently at a Hyundai dealership for inspection and repair for the repeat issue and should be available for inspection upon request. The prior dealer record appears to describe the issue generally as a “driveability concern,” but the current repair diagnosis and full repair notes are still pending. It is unknown whether the dealer has reproduced or confirmed the failure during the current visit. I am reporting this as a sudden loss of motive power at highway speed involving the fuel/propulsion system, engine, and/or powertrain.

I am submitting a complaint regarding a turbocharger failure on my 2017 Hyundai Santa Fe VIN [xxx] . The vehicle experienced turbocharger-related failure symptoms including loss of power and drivability concerns. This created a potentially dangerous situation because the vehicle was unable to accelerate normally and could have caused difficulty merging into traffic or maintaining safe roadway speeds. I contacted Hyundai motor America requesting assistance with repair coverage. Hyundai denied assistance solely because the vehicle was outside the warranty period by time and mileage, despite the seriousness of the failure. I am concerned this issue may be related to broader engine or oil-related defects reported in Hyundai vehicles, including possible oil starvation, excessive oil consumption, or internal engine contamination that could contribute to turbocharger damage or failure. I believe this condition may represent a safety-related defect because sudden power loss during operation increases the risk of a crash. I request that NHTSA review this issue and investigate whether similar turbocharger or related engine failures are occurring in 2017 Hyundai Santa Fe vehicles. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Fuel injector failed the entire engine on my 2022 Santa Fe had to be completely replaced. The dealership put in a new engine. Santa fe is only four years old. That is highly unusual.

Vehicle exhibits delayed deceleration after releasing accelerator. Engine rpm remains elevated for several seconds, causing the vehicle to continue applying power unexpectedly. Issue began after recent repair and was not present before. Condition is intermittent but reproducible and affects drivability.

Engine light for car read codes po 304 303 420 prior to sale of car per code read out taken when engine light went off shortly after my purchase. Not addressed prior to sale. Codes read and called to dealership. Car taken for service. Reported fuel smell, exceleration issues, short stallings. Same codes. Stated car was " fine. " drivable. Asked for brakes/ rotors to be checked. No documented brake service given. Stated they were "fine. " taken to local brake place next day that confirmed brake rotors needed repair. Car returned after began sputtering. Reported as fuel injector failure. A known issue with this makr and model that shown codes point to that were given to, and read at service center by mechanic at dealership twice. They did not mention replacing catalytic converter, that is damaged from injectors and an emissions issue at time of call regarding repair report. No brake report or inspection requested multiple times to be checked. Did not follow correct protocol to ensure engine was clear of fuel sprayed by injectors into pistons, intake valves, ect. They placed my self at risk for engine fire, sudden car failure. Consistently mislead and failed to do proper reseach and care regarding car issues and hazards it presented. Being a known issue with this make and model it was a failure to inspect for issue. An emissions failure and violation to allow a damaged catalytic converter to be on road. This issue with the car is in class actionable suit. It is not on the recall list. As it damages the whole car systemi including emissions, it should be forced to be on the recall list so dealerships cannot allow potential harm to their customers as well as violating emission laws.

Traveling in a 55 zone on rt 27 and my vehicle lost power and said pull over and charge vehicle with engine on. I did this once and the battery went up to half way charge then I could start to drive again. Less than a half a mile up the road climbing a good size hill by the town’s salt shed—the same issue occurred. I had to pull over again and allow battery to recharge. This is not a complete hybrid, it has a gas engine not sure why the hybrid and gas are not syncing up. Many users on the internet have reported the same issue that I have experienced. Someone needs to investigate this before major injury occurs.

I bought a 2018 Hyundai Santa Fe from a dealership in may of 2023. Ever since then I have paid around $8,000 in repairs for this car. These repairs have been so expensive and time consuming that last year I wasn’t able to drive it for 6 months because it was in the shop for most of the year. I had to fix the fuel pump, the battery, timing chain valve twice, O2 sensor , catalytic converter, engine valve, cylinder 1 & 3 and now I have to fix cylinder 2 & 4 & that cost again around $2,000 to fix. I am constantly stressed out, crying and becoming broke because I have to keep on repairing this car. I use up all of my tows every year because my car always shuts off on me while I am driving. I am at the point where I want a refund on the car and I want to get rid of this vehicle. I do not feel safe driving on the highway or driving with my two kids and I am currently pregnant again and this car isn’t safe for a family. I am constantly feeling broken down and worthless because I can’t even keep this car a float.

I purchase the 2017 Santa Fe sport in October of 2023 with just short of 80k miles. It was in great condition and had no issues. I have maintained it according to Hyundai specification and regular on schedule oil changes with recommended 5w-20 full synthetic. At approximately 100k miles, I experienced an oil pressure light on the dash, when checked, the engine was approximately 2 quarts low. From this point on, the engine started consuming oil at an increasing rate all while I maintained regular maintenance. First, 1 quart a month, or about 1200 to 1500 miles, then to 1 quart every 2 weeks or 800 miles. I maintained weekly checks on the oil level and on the evening of 3/24/2026, I had added a quart, bringing the level to the midway point between the high and low dipstick markings. On the afternoon of 3/24/26 while driving on the highway in heavy, but at speed limit, traffic on the highway, I experienced a loss of power and a check engine light. I was able to exit the highway but the car started to run very rough and unable to idle. Luckily, there was no traffic approaching when I turned off the exit and made a left into parking lot to shut off the vehicle. I will be having it towed to a dealership in the next few days for their analysis.

Enterprise car sales sold me this vehicle when it had 3 open recalls on it. The vehicle itself was a problem from the beginning. When I took it in for it's first oil change the mechanic told me it had no oil in it. He said they sold me a car that is notorious for consuming oil and or seizing or blowing up. I had the engine replaced on this car already and I just took it in for it's first oil change and it was already consuming oil. I want a new car but enterprise is telling me this is my problem.

I was driving on March 20, 2026 at about 12:00 pm when I suddenly noticed smoke, a strong gasoline smell, an oil smell, and a burning odor coming from the vehicle. I pulled over immediately because I believed the vehicle was unsafe and at risk of fire. The vehicle had to be towed. An independent repair shop later found a fuel leak at the high-pressure fuel line / fuel pump area, a loose ground wire on the right-hand side of the engine, a valve cover gasket leak, and engine timing chain noise. I was informed that gasoline had sprayed throughout the engine bay. This created an immediate fire hazard even though no actual fire occurred. This problem was especially concerning because the vehicle had been inspected and serviced by an authorized Hyundai dealer in December 2025, less than about 3,000 miles earlier. The loose engine ground wire and fuel leak raise serious concerns about vehicle safety and the adequacy of the prior inspection. I contacted Hyundai the same day and reported this as a fire-risk safety issue, but I did not receive timely assistance. Because immediate dealer service was not available, I had to authorize emergency repairs at a local shop for safety reasons. No warning lights were noted before the incident. The failure was confirmed by the repair shop.

See all problems of the 2013 Hyundai Santa Fe 🔎.

My vehicle had oil consumption problems that were fixed with a new replacement engine now my catalytic converter is going bad due to engine oil consumption problems and the dealer I deal with is refusing to help with this issue. There is only around 50k miles on the new engine. I would greatly appreciate your help with this thank you!.

While traveling at approximately 80 mph on the highway, my vehicle suddenly lost all response to the accelerator pedal. Despite continued pressure on the gas, the vehicle rapidly decelerated to approximately 40 mph on its own. There were no warning lights, unusual noises, or physical indicators of a problem before, during, or after the event. I was able to safely navigate the vehicle off the highway. The vehicle appeared to operate normally afterward. The following day, I brought the vehicle to a mechanic who was unable to replicate the issue and found no stored fault codes. No repairs were made. Given the known concerns surrounding the theta ii engine in this model year, I am submitting this incident for documentation purposes and to contribute to any ongoing or future investigation into sudden acceleration loss in 2013 Hyundai Santa Fe vehicles.

2018 Hyundai Santa Fe sport. Purchased January 2026 took to oxmoor Hyundai service center March 2026. February 2026 began using oil at a measured rate of 700 miles per tank of oil. Used 3 full tanks of oil within the month of February. Oil lights and engine lights on and off and flashing during this time. March 8, 2026, engine light flashed and then stayed on continuously. Engine shook and stuttered and made a loud noise. Engine stalled while I was driving at 35-40 miles per hour. I was able to continue driving to my home with the stuttering and stalling. The next morning I drove it to the oxmoor Hyundai service center. I told relayed the timeline of all symptoms I had experienced over the 2 month lifetime of my ownership. They did not attempt to reproduce the issue. They only entered "shakes in reverse" as the customer provided issue on the intake information. Service center performed diagnostic, found cylinder misfires on cylinder 2 and cylinder 4. Replaced spark plugs to resolve cylinder 2. Cylinder 4 continued to misfire. Used borescope and found broken valve. They did not address the scoring on the cylinder of the valve. Recommended engine replacement. Advised it would not be covered under a warranty because the rod did not break. The oil consumption was proven with documentation from multiple valvoline visits and the vertical scoring was present on the cylinder with the broken valve in the borescope photo. The service center refused to do a boring clearance test or any other test that would prove the engine should be covered under an extended warranty or class action settlement. It wasn't until I reviewed hma documents uploaded to the bbb arbitration, that I realized that the information I initially gave to the service center of all the symptoms with timelines had not been entered into the system for diagnostic review by techline. Arbitrator denied my claim under the theta settlement because the rod had not broken yet, but she said my engine was defective.

This complaint concerns a serious, unresolved powertrain/propulsion safety defect in my 2023 Hyundai Santa Fe. While traveling approximately 70 mph, the vehicle suddenly lost propulsion and would not accelerate normally while surrounded by highway traffic. Most importantly, there was no warning or advance indication. No warning lights, messages, or symptoms appeared before the loss of propulsion. I had no opportunity to anticipate the failure or prepare to safely exit traffic. This placed me and other motorists at immediate risk of a serious or potentially fatal collision. A Hyundai dealership inspected the vehicle and documented dtc p284001, shift fork d position fault. Despite this documented fault, the underlying safety issue remains unresolved. Hyundai has not identified a permanent correction or established that the vehicle is safe to operate. There has not been another incident because I will not risk another sudden loss of propulsion by driving the vehicle. The absence of another failure does not mean the problem is resolved. The vehicle remains available for inspection. I have repeatedly sought assistance from Hyundai and the dealership without a meaningful resolution. Newer information regarding a possible computer reset/relearn procedure has also been presented, but the dealership refuses to perform it. I reviewed NHTSA complaints for 2023 Santa Fe vehicles and found multiple reports describing similar safety symptoms, including sudden loss of propulsion, inability to accelerate, abnormal transmission shifting, and loss of speed. This raises serious concern that this may not be an isolated failure. A vehicle that can unexpectedly lose propulsion at highway speed without any warning creates an extreme crash risk. I respectfully request that NHTSA review the similar complaints, investigate whether a broader transmission/powertrain safety defect exists, and determine whether corrective action is necessary before this results in serious injury or death.

See all problems of the 2023 Hyundai Santa Fe 🔎.

On March 04, 2026, I took my 2019 Hyundai Santa Fe to the local dealer for oil change service. As part of that service visit, they performed Hyundai recall 9c1 which was supposed to lower tailpipe emissions. The next morning, and ever since, my vehicle ran differently. The engine had several 1000rpm surges and was sluggish at other times. This behavior has continued. Particularly when I first start out in the morning and the engine is cold. Never after the engine is warmed up. A visit to the Hyundai forum shows a growing list of other Hyundai owners who are experiencing the same issues. This recall is defective and should be corrected.

On March 4, 2026, at approximately 7:30 am est, while driving my 2023 Hyundai Santa Fe limited on [xxx] , the vehicle experienced a sudden loss of propulsion while traveling at approximately 70 mph (posted speed limit). The vehicle would not accelerate or maintain speed and would not move forward when placed in drive, indicating a failure within the powertrain/transmission system. The vehicle is currently located at a Hyundai dealership and is available for inspection upon request. This incident created a significant safety risk, as I was traveling at highway speed in active traffic when the vehicle unexpectedly lost the ability to move under its own power. This placed me at risk of being rear-ended and made it difficult to safely maneuver out of traffic. The vehicle was inspected by a Hyundai dealership. Diagnostic trouble code p284001 (shift fork “d” position) was identified, and I was informed the failure is transmission-related. The condition was reproduced by placing the vehicle in drive, at which point the vehicle would not move. The vehicle has been inspected by the dealership. The manufacturer has been notified but has not physically inspected the vehicle. No police or insurance inspection was involved. There were no warning lights, messages, or prior symptoms before the failure. The issue occurred suddenly without any indication of a problem. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

My 2018 Hyundai Santa Fe sport equipped with a theta ii gdi engine began exhibiting excessive oil consumption, engine knocking, and cylinder misfires consistent with the known theta ii engine defect covered under the Hyundai class action settlement. Prior to the failure, the check engine light illuminated and I experienced repeated misfires and audible engine knocking. The vehicle required frequent oil additions between oil changes due to excessive consumption. The vehicle was taken to an authorized Hyundai dealership where a diagnosis confirmed a burnt valve inside the cylinder head. The dealership recommends replacement of the cylinder head or complete engine replacement to correct the issue. The dealership performed a bearing failure test and attributed the burnt valve to carbon buildup. However, excessive oil consumption in a gdi engine directly accelerates carbon buildup on intake valves, as burning oil deposits carbon on valve surfaces preventing proper seating and causing overheating and valve failure. The carbon buildup is therefore a consequential result of the theta ii oil consumption defect, not an independent cause. The safety risk is significant as engine misfires and knocking while driving create unpredictable loss of power and potential for stalling in traffic. The vehicle is currently not reliably operable. The manufacturer has been contacted regarding coverage under the theta ii settlement. The component is available for inspection upon request at the servicing dealership.

While driving on the interstate at 70mph the vehicle’s fuel injectors failed causing the vehicle to lose power suddenly.