2025 Hyundai Santa Fe Hybrid

My vehicle randomly slows it self down while driving. I would be pressing the gas and the car would voluntarily slow down on its own with no warning. This problem can lead to plenty of accidents due to me or any other driver around me being unaware when my vehicle will brake on its own. The problem has been confirmed by Hyundai Patterson of Tyler, Texas and they have worked on my car twice to fix the issue and it still hasn't been fixed. The issue started about a month ago and when the incidents would occur in the beginning their would be no warning lights on my vehicle’s dash. As of recently there maybe a check engine light that will pop up when the incident occurs. It's a hit or miss.

While driving, the vehicle will suddenly fail to accelerate beyond approximately 45 mph, even with the accelerator fully depressed. During these events, the engines RPMs increase significantly without a corresponding increase in vehicle speed. When this occurs, the hybrid battery fails to hold or maintain a charge, and the vehicle appears to enter a reduced-power or limp mode condition. This condition makes the vehicle unsafe to operate, particularly in traffic, on highways, or when merging or passing is required. This issue has occurred multiple times and is ongoing. The vehicle has been taken to the dealership 5 separate times (currently in there now for the 5th time) for the same issue. Despite repeated repair attempts, the dealership has been unable to identify or permanently correct the problem, and the condition continues to occur. The safety impacts are as follows: -Vehicle cannot maintain normal traffic speeds -Sudden loss of acceleration -High RPMs without propulsion -Inability to safely merge or respond to traffic. This defect substantially impairs the use and safety of the vehicle. Yes, the problem has been reproduced and confirmed by the dealership on each occasion and the issue continues even after several repair attempts. No warning lights have ever been displayed. The first time in the dealership was 5/10/25 No injuries/accidents (the issue is still safety-critical even without a crash)

Sitting at stoplight and attempted to go. Car wouldn’t go above 10mph even with pedal all the way down. Drove for a bit trying to figure out what was wrong. Then flashing red lights and beeping telling me to pull over safely. Pulled over and turned the car off. Restarted and car said charge battery. Apparently this is called “limp mode” and happens when there is something seriously wrong with the car in order to prevent further damage. Very dangerous to not be able to go about 10mph on the highway. Took to dealership. Vehicle isn’t throwing any codes and blue link shows nothing of the incident. Dealership supposedly checked battery and connections. Nothing done

Supplemental Update – Ongoing Safety Concerns and Extended Loss of Use Since submitting my initial complaint, my leased Hyundai vehicle (VIN [XXX] ) has now been presented for service for the third time for the same unresolved safety-related issues. The vehicle has been held by the dealership for eight (8) consecutive days during this service visit with no resolution and no clear timeline for return. Safety concerns remain unresolved, including: Persistent toxic/chemical odor inside the cabin Random rear hatch opening while vehicle is parked and locked Repeated false “windows open” alerts Electrical/body control system irregularities To date, I have not been provided with documentation confirming that cabin air quality testing, exhaust intrusion testing, or comprehensive electrical diagnostics have been performed. These unresolved conditions present ongoing safety risks and loss of use. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I was stopped at a red light. When the light turned green, I proceeded to apply the gas and accelerate. I quickly noticed that the vehicle began accelerating at a faster rate than I was intending. The vehicle continued to accelerate without me applying my foot to the gas pedal. Nothing would stop the continued acceleration (application of brake). I crashed into the rear of a vehicle in my lane going approximately 50-60mph (estimate). I am unsure what the issue was that resulted in this crash. In doing some internet searching, it seems it could have something to do with the transition from electric to gas when I was stopped temporarily at the intersection. It could have been a faulty sensor (throttle position) or software glitch. These components have not been inspected by the manufacturer, police, or insurance representatives. There were no warning lamps, messages or other symptoms of the problem prior to the failure. The crash resulted in the airbags being deployed, I was taken to the hospital with a likely concussion and moderate injuries to my chest and hand. The vehicle that I rear ended was a [XXX] woman with a [XXX] old in the vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On August 8, I was traveling to work on the interstate. The car started losing speed even though my foot was on the accelerator. I was unable to get the car above 30 mph despite having my foot on the accelerator. I exited the interstate to try and find a safe place to pull over. I parked the car, turned it off, restarted it and attempted to drive it. The problem continued. There were no icons or alerts showing up on the dashboard of the car to alert me that there was an issue. The vehicle has been at the dealership for repair for over 100 days. They will not communicate with me about the issue or provide updates.

Stopped for gas, vehicle started but would not go into gear, engine lights indicated 'Check hybrid system', warning lights shown. 1/2 hr on the phone with dealership to assist. No problem detected when returning to home dealer. Second episode occurred, vehicle at dealer for the past 4 weeks. Episode repeated at dealership yet "no abnormalities are detected with diagnostics ".