2021 Hyundai Santa Fe fuel system problems

Filed Nov 1, 2026 · Engine, Fuel system · NJ

For approximately the past year, my 2021 Hyundai Santa Fe, currently with about 23,000 miles, has experienced intermittent engine and fuel-system problems. During start-up, the vehicle sometimes makes an abnormal rattling/cranking noise, followed by noticeable engine and vehicle vibration. Warning lights may appear, and on some occasions the engine does not start successfully on the first attempt. When it does start, it may initially run rough. The vehicle has also stalled intermittently and has had repeated incidents where pressing the accelerator produced little to no engine response or acceleration. This creates a serious safety concern because the vehicle may unexpectedly stall, lose power, or fail to accelerate when needed while driving. The vehicle has been at an authorized Hyundai dealership for more than one month. The dealership has been working with Hyundai Tech Line and has replaced or evaluated the low-pressure fuel pump, high-pressure fuel injector, high-pressure fuel pump, MPI/port fuel injector, and valve cover. The latest recommendation is to drain, clean, and refill the fuel tank. Despite these repair attempts, the root cause has not been clearly identified or permanently resolved. I am concerned that the repair process has become trial and error, with additional components being replaced while the underlying safety-related issue remains unresolved. I am also being asked to pay out-of-pocket for some of these unsuccessful repair attempts. The vehicle is currently at the Hyundai dealership and is available for inspection if needed.

Filed Nov 1, 2026 · Driver assistance, Fuel system · FL

My 2021 Hyundai Santa Fe SE (VIN: [XXX]), with approximately 93,000 miles, has repeatedly experienced a dangerous loss of acceleration while driving at highway speeds of approximately 60 mph. When I press the gas pedal, the vehicle fails to accelerate, making it difficult to merge, pass, or respond safely to traffic. The vehicle does not suddenly slow down, but it will not increase speed when needed. This creates a serious safety risk to me and other motorists. The problem occurs without a check-engine light or advance warning. I have noticed abnormal behavior involving the Idle Stop & Go “A” indicator, which changes between orange and white. Coconut Creek Hyundai, an authorized Hyundai dealership, has inspected the vehicle multiple times. The dealership initially replaced the battery, then diagnosed and replaced the high-pressure fuel pump. The pump was replaced a second time due to a reported issue with the replacement. Software updates or resets were also performed. Despite these repairs, the original acceleration problem continued. The dealership has now diagnosed all four fuel injectors as severely clogged or defective and recommends replacing them. The service advisor stated in writing that the high-pressure fuel pump failure caused the injectors to fail. However, the dealership has not explained why this damage was not identified during earlier repairs or provided assurance that replacing the injectors will resolve the acceleration problem. Hyundai Motor America has been contacted regarding the repairs. The vehicle and dealership service records are available for inspection upon request. Availability of previously removed parts must be confirmed with the dealership. I request that the federal safety agency investigate this recurring highway acceleration failure as a potential vehicle safety defect. Multiple repair attempts have failed to resolve a condition that could result in a serious accident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 27, 2026 · Fuel system · NY

The door to the gas tank is a push door which is temperamental. I can be at the pump and push the door to pop it open and it won't. I'm at the point where I have to pop my gas tank open before I even get to the gas station because to pull up to the pump and not be able to put gas in the tank is a waste of time. There is no lever to flip along side the driver seat because it is a push to open door.. it is available for inspection, however, it is temperamental. I will video it so I have proof as it works and it doesn't work. It has not been inspected by anyone only because if it is a defect in the motor for the door, I want Hyundai to recall it. I have gone on YouTube to see if there are remedies and yes, there are videos on how to open the door in case you cannot push it open. I cannot do this because I'm not ruining the back of my car as there is no compartment to open as shown in the YT video. I am not one to let my tank get down to less than 1/2 tank, especially not now. But why am I worrying about popping the door open when I'm not even at the gas station yet??

Filed May 11, 2026 · Engine, Fuel system · FL

My 2021 Hyundai Santa Fe (VIN [XXX] ) is experiencing severe engine instability, including rough idling, hesitation upon acceleration, and intermittent stalling. These symptoms align with TSB 26-FL-001H regarding defective GDI fuel injectors. The vehicle has stalled in traffic, creating an immediate risk of a rear-end collision. Despite being within the 100,000-mile Powertrain Warranty, the manufacturer is refusing to perform the required diagnostic tests (GDS Fuel Pressure Drop Test) to identify the leaking injectors. This failure to diagnose a known fuel system defect poses a significant safety risk to the driver and other motorists. The primary safety risk is unexpected engine stalling while the vehicle is in motion or stopped at intersections. Additionally, the loss of power during acceleration prevents the vehicle from safely merging into high-speed traffic, significantly increasing the likelihood of a collision. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 6, 2026 · Fuel system · CO

When I try to open the fuel cover it wont' open. I have to lock and unlock my car, sometimes up to 10 times, to get the fuel fill door to open. This eventually is going to leave me stranded somewhere stranded. Some of my same year and model are covered under recall for this issue by when I call Hyundai my VIN is not covered. I would like it to be covered and repaired.

Filed Jun 20, 2025 · Fuel system · MD

I am writing to formally report an issue with my vehicle that I believe may warrant a recall investigation. The issue involves the fuel door, which is failing to open after the car has been turned off. This has occurred repeatedly and is preventing me from refueling the vehicle, posing a significant inconvenience and potential safety concern. Despite ensuring that the vehicle is unlocked and powered down as instructed, the fuel door remains stuck and will not release. This malfunction requires manual intervention or technical assistance each time I need to access the fuel tank, which is not only frustrating but could also become hazardous in certain situations. I would appreciate it if this matter could be reviewed for possible recall consideration or guidance on next steps. Please let me know if additional documentation, including my VIN or service history, is needed.

Filed Mar 8, 2024 · Engine, Fuel system · PR

While driving and must stop due to traffic light, stop sign or intersection and the auto start is on as soon I lift the foot foot from the brake pedal to continue driving the vehicle stumble and it completely stop the engine while the vehicle transmission is still in drive. In order to start again I have to switch transmission to park and turn key ignition switch to start vehicle, it start again and I can continue. While driving and must stop due to traffic light, stop sign or intersection and the auto start is on as soon as I lift the foot from the brake pedal to continue driving the vehicle stumble and it completely stop the engine while the vehicle transmission is still in drive. When I take the vehicle to the dealership the Service writer writes on the computer but they do not allow me to see a copy of what I am reporting. I like my vehicle, I just want it to be fixed and me and my two daughters be safe when needed after a mandatory stop due to traffic signs, intersection driving through or any other emergency stop and go due tragic and or road condition.

Filed Sep 14, 2023 · Engine, Fuel system · OH

During low speeds the car stalls out which could cause a safety issue for my family

Filed Dec 7, 2022 · Engine, Fuel system · WA

There were two warning (?) "bings" from the instrument cluster and then vehicle completely lost power and would not exceed maybe 2 MPH. Vehicle had forward drive, but no willingness for engine to speed up beyond idle speed. Was like this for several city blocks until I was able to restart at a traffic light and then it resumed normal operation. Did not notice any warning lights and no messages popped up in the instrument or vehicle display. Just the two "bings" before power loss. This is actually the second time this has happened. Last time was while accelerating on a freeway onramp, but vehicle corrected itself more quickly and without need for restart.

Filed Sep 26, 2022 · Engine, Fuel system · FL

This SUV has been plagued with issues, and yet after 5-6 visits to the dealership, they don't seem to be able to fix them all. The vehicle (2.5T AWD) currently has around 14k miles and within the past month the gas pedal suddenly became unresponsive, worst of all while carrying my kids and wife in the car. Coming to a dead stop to cross an intersection, went to accelerate to join traffic and the car wouldn't accelerate. Last time on 9/23 when I almost got into a head-on accident while making a left turn as the car barely moved into the first of three incoming lanes, would not accelerate and so forced me to quickly hit reverse, outrageous! Other three times while making a right turn. Auto engine-off has been disabled on all occasions (hate it); two times happened while driving on smart mode, another one on comfort and another one on sport mode. Car has been always using Mobil, Shell or Chevron gasoline. Which also brings me to another point, the vehicle suddenly started consuming crazy amounts of gas, currently at 16mpg for the past 4 full tanks! The vehicle was dropped off at dealership on 9/26/22 and already filed for Lemon Law in FL as this is absolutely unreliable and dangerous to carry my family on. According to manager at Rick Case Hyundai of Davie, an update for the transmission just came out this week after a recall and so they were going to reprogram. I am still getting rid of this p.o.c.