2024 Hyundai Santa Fe Hybrid: sudden loss of power

Filed Jul 4, 2026 · Electrical, Engine · WA

While driving on the highway the vehicle lost power and then lowered the transmission gear and would not accelerate over 17mph regardless of pressure on accelerator. I switched from auto hybrid mode over to sport mode so the gasoline engine could be used yet the transmission would not increase power to the tires. I stopped several times and restarted with no corrections. Vehicle battery drained quickly and vehicle alarm told me to pull over to charge battery. Sat for a few minutes to charge battery, put in drive and vehicle went forward to 17-20 mph and would not go any faster. Pedal was to the floor. The vehicle then gave several alarm lights and system failures. I limped the car home and called roadside assistance. Tried to put car in reverse for an easy tow and the car wouldn't move in reverse.

Filed Jun 23, 2026 · Brakes, Electrical · TX

While driving on the highway, my 2024 Santa Fe Hybrid suddenly and without warning lost propulsion power. The loss of power was immediately accompanied by multiple simultaneous warning lights across the instrument cluster, glitching and abnormal behavior of the cluster display, and then a complete electrical shutdown of the vehicle. After the shutdown, the vehicle would not restart. The failure occurred in connection with a software update on the vehicle. At the time of the incident the vehicle had approximately 12,828 miles on it. Losing motive power while traveling at highway speed created a serious crash risk, as the vehicle was unable to maintain or recover speed in moving traffic. No crash, injury, or fire resulted. The vehicle was towed to an authorized Hyundai dealer for diagnosis. I have photographs of the instrument cluster taken at the time of failure showing numerous warning indicators illuminated at once. The symptoms I experienced — progressive or sudden loss of drive power, 12-volt/charging-related faults, and failure to restart — appear consistent with charging-control and DC-to-DC converter failures that have been the subject of prior recalls and complaints on Hyundai electrified vehicles. I am filing this report to document the incident as a safety concern.

Filed Apr 8, 2026 · Engine, Fuel system · MI

Original letter to Hyundai below. The car is currently at a dealer again for repair of the same issue. Fuel pump replaced in Nov 2025 but issue has returned in March 2026. Videos of the issue recently occurring are available. Good morning, We had our 2024 Santa Fe Hybrid lose power while merging onto the freeway in November 2025. I was pressing the accelerator and it did not do anything, just kept rapidly decelerating. Pulled the car to the shoulder and turned it off completely and back on, and the car started up with the engine running which was unusual- typically the car starts up in silent electric mode. It would not accelerate past a few miles per hour. This has now happened on multiple occasions, disappearing for a few days only to return. It has gotten very dangerous to lose speed and acceleration into a busy freeway and almost caused an accident yesterday. We were thankfully close to a dealer (Glassman Hyundai in Southfield, MI) and were able to limp it a mile down the shoulder at low speed to drop it off. However, they are telling us they have no loaners available to provide us which seems unacceptable with a car under warranty with 18k miles on it. Is there anything you’re able to do to assist? Are there any known fixes for the issue that can be reported to the dealer? Thanks, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 19, 2026 · NC

The vehicle has gone into limp mode multiple times with no check engine indication displayed, causing significant safety issues in that the sudden loss of power occurred while traveling on the interstate highway. Each time, by loosing power and trying to get to the side of the road to safety was terrifying and very unsafe to us and the cars/trucks around us. The issue began on 11/5/24 and continues up through 11/12/26. Videos of vehicle performance are available upon request since they are unable to be uploaded via this form. The vehicle has been towed to three different Hyundai service departments. No diagnostic codes show up, nor have they been able to duplicate the issue. We have provided videos of the display screen and the performance of the vehicle while in limp mode. We have been told by Hyundai Service that unless a code shows up in the diagnostics, there is nothing they can do for us. At this point, since most of our driving is on the interstate, we are afraid to drive the vehicle for fear of a serious accident occurring when it loses power.

Filed Sep 10, 2025 · Transmission · UT

Vehicle Information: 2024 Hyundai Santa Fe Hybird SEL VIN: [XXX] Purchased date: [XXX] (Less than one year) Mileage at incident: 12,753 Incident date: [XXX] Dealer: Kengarff Downtown Hyundai Summary of Problem: I am filing this complaint because of a serious safety concern caused by clear dealership negligence and potential engine failure. During a routine service, the dealership failed to add engine oil, but recorded in the service invoice that it was added. I unknowingly drove the vehicle 3–5 miles without oil, and multiple DTC error codes (P052400, P001100, P001400) appeared. The oil warning light, which should have alerted me, did not activate. Although a later borescope inspection stated there was “no immediate damage,” since then, the vehicle has shown: Significant loss of power and acceleration Abnormally high RPMs, even when the car is stopped Louder engine noises RPM is increasing suddenly while driving downhill without acceleration This vehicle is less than one year old and costs over $40,000. I should not be forced to drive a new car that may have hidden or delayed engine damage. Safety Concern: I have a [XXX], and I cannot risk sudden engine failure, stalling, or fire while driving. This is not only a reliability issue, but a serious safety hazard for my family and others on the road. Attempts to Resolve: Reported to Hyundai corporate, case opened. The dealership admitted the mistake but denied responsibility after the inspection. Hyundai corporate stated “no action until further inspection,” despite clear evidence of negligence. I continue to experience performance and safety issues. Requested Action: I urge the federal safety agency to investigate this incident and hold Hyundai accountable for both the dealership’s negligence and the potential safety defects (oil light failure, possible hidden engine damage). Consumers should not be left to drive unsafe vehicles, especially when children’s safety is at stake. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)