2024 Hyundai Tucson Engine Problems

I am submitting a vehicle safety complaint regarding my 2024 Hyundai Tucson Hybrid. The vehicle has a recurring engine warning issue (code P0471) that has not been resolved despite multiple repair attempts by an authorized Hyundai dealership. Additionally, there is a concerning discrepancy regarding vehicle usage while in dealership custody. My records indicate a substantial increase in mileage during service, which is not reflected in official service documentation. This raises concerns about vehicle handling and accountability. Hyundai has declined to escalate or properly address the issue and has advised that they will continue repair attempts without further resolution. Given the recurring nature of the issue and the lack of accountability, I am concerned about potential safety risks. I respectfully request that this matter be reviewed and recorded as part of any ongoing safety investigations.

On Wednesday February 4, 2026 my car began to shake and shudder and almost stall out and the check engine light came on again. I had just gotten my car back from Burlington Hyundai the day before for the same problem. I drove it straight to the dealership for service. This time, they said it was a problem with the EGR system. They replaced some things and I got my car back on Friday February 13, 2026.

On Saturday January 31, 2026, I was driving and the tachometer started to go low like the car was going to stall out and the car began to shake. Then the check engine light came on. I was afraid to drive it, so I parked it in a church parking lot and had it towed to Burlington Hyundai on Sunday February 1, 2026. On Monday February 2, 2026 Burlington Hyundai said there was a problem with the spark plugs and that was why the check engine light came on. They replaced the spark plugs and it was covered under warranty. I got my car back on Tuesday February 3, 2026.

Component: Engine/Powertrain/Electrical System Incident Description: I am reporting a recurring, life-threatening "Loss of Motive Power" (Dead Pedal) in a 2024 Hyundai Tucson (Alabama-built). On multiple occasions, the vehicle has failed to respond to throttle input during high-risk maneuvers, specifically while merging into 45+ MPH traffic. The vehicle "chugs" and stalls, refusing to exceed 15 MPH despite full accelerator depression. This defect leaves the vehicle and its occupants stranded and defenseless in the path of oncoming high-speed traffic. Technical Context: This vehicle is currently subject to NHTSA Recall 23V-526 (Hyundai Campaign 246) for electronic controller damage that can cause "CAN communication disruptions." I believe the "Dead Pedal" failure is a direct result of these communication disruptions between the engine and transmission control modules. Furthermore, Hyundai has issued TSB #24-AT-001H-1 for "Hesitation when accelerating," yet the authorized dealer (Ed Voyles Hyundai) has been unable to remedy the defect after 84 cumulative days out of service. Safety Risk: This is not a convenience issue; it is a critical safety failure. The unpredictable nature of the power loss makes it impossible to safely judge gaps in traffic. The vehicle effectively becomes a stationary object on active roadways without warning. Manufacturer Response: The manufacturer has been formally notified via certified legal counsel. Despite 79 consecutive days in the current repair attempt (since Jan 16, 2026), the manufacturer has failed to provide a fix or acknowledge the severity of the safety risk. An informal third-party evaluator attempted to dismiss the claim despite the vehicle's documented inability to maintain motive power. We are requesting that NHTSA investigate the adequacy of Recall 23V-526 and TSB #24-AT-001H-1, as these measures have failed to resolve this life-threatening "Dead Pedal" condition in my vehicle.

My 2024 SEL hybrid has a very annoying acceleration delay after a full or partial stop. The delay has occurred many times. It is present no matter which mode the car is on. It is not a matter of slow acceleration, but a 1-2 second delay of anything happening after I press the pedal. this could be a safety issue when you're at a stop sign and you need to proceed and you can't go.

On October 8, 2025, my car's tachometer started to dip and my car began to shake like it was going to stall as I approached a traffic light. The check engine light came on. I was close to my destination (about a 1/4 mile) so I drove to the parking lot and turned off the car. I started it again and the check engine light turned off and the car was running fine. On October 13, 2025, I took my car in for a routine oil change to a local repair shop and when they tried to reset the oil change reminder, the system would not work. Within a day, the entire computer system for the radio, warning systems, air conditioner/heat, etc, would not work. I took it to Burlington Hyundai on October 15, 2025 and they had to replace the CPU in the car. I got my car back on October 22, 2025. They said the check engine light did not come on again. It was covered under my warranty. I had my brakes replaced while they had the car out of convenience.

The contact owned a 2024 Hyundai Tucson. The contact stated that his wife was reversing out of the work parking space, the brake pedal was depressed, and when the gear shift was shifted into drive(D), the vehicle then accelerated independently. The contact stated that the engine revved, hit a parked vehicle, bounced off that vehicle, and continued to accelerate independently, abruptly veered the steering wheel to the left to avoid hitting a tree. The contact's vehicle then hit a second parked vehicle, where it came to a stop. No warning lights were illuminated, and none of the warning alarms sounded. The driver’s and passenger’s side air bags did not deploy. A police report was not filed. There were no injuries sustained. The insurance company was notified and towed the vehicle to a collision center. The vehicle was not diagnosed. The manufacturer was not notified of the failure. The failure mileage was 17,000.