The vehicle has gone into a limp mode unexpectedly while driving on the highway at 60+ mph. The first issue was on May 13, 2026. The car immediately stopped driving and went into limp mode and cannot go over 30 mph. It was taken to a service dealer. They could not replicate the problem, therefore the vehicle was given back as undiagnosed. This next incident occurred and almost caused an accident, and that was on June 3, 2026, again driving on the beltway around Maryland. The car went from 70 mph to 30 mph. The vehicle stayed at 25 to 30 mph the entire time. Could not get it to do anything else. Drove cautiously on the side of the road and got to the dealership after driving 30 minutes at 25 mph.

Sudden loss of power while driving on the interstate (65 MPH) , car would no longer accelerate and slowed down to ~10 MPH. Had to merge onto emergency lane, car struggled to power over 30 MPH. Warning light came up to "Park with engine On to charge battery". Parked car and restarted car and still did not resolve issue. Had to switch the car into "Sport" mode to drive home.

Driving home from church this morning, the vehicle experiences a sudden loss of power and the car went into “limp mode”. Even the pedal floored and the engine rpms high, the car would barely go about 25 or 30 mph. A message from the dash board told me to pull over and leave the engine running to charge the EV batteries. The batteries would charge enough for what I thought would get me home but quickly drained leaving repeat the action until I could limp the six miles home with flashers on and cars passing me to get around. No warning lights and no indication there was a problem until it happened leaving me baffled and frustrated. I was just thankful that I wasn’t going faster when it happened. If I had been going faster when this happened, it could have created a major accident. Dangerous! Since this happened on Sunday, the dealer wasn’t open. I hope to get it to the dealer tomorrow to find out what is going on and how to fix it. The car has only 14850 miles on it.

The contact owns a 2025 Hyundai Santa Fe. The contact stated that while driving approximately 65 MPH, the vehicle unexpectedly decelerated to 25 MPH with a “Vehicle Will Shut Down” warning message displayed. The contact stated that the engine then began to shut down, and although the accelerator pedal was depressed, the vehicle failed to accelerate and stalled. The failure occurred on multiple occasions, requiring the vehicle to be towed each time. The vehicle was towed to the dealer; the vehicle was not diagnosed or repaired and the contact was informed that the failure could not be duplicated. The manufacturer was made aware of the failure and multiple cases were opened, The failure mileage was approximately 3,300.

"My 2025 Hyundai Santa Fe Hybrid has experienced repeated parasitic battery drain. Dealer diagnostic reports dated 5/12/26 and 5/14/26 document 'Excessive dark current draw condition identified' with dark current spikes well above the normal threshold of 50mA. Vehicle was at Kelly Hyundai of Stroudsburg PA for approximately two weeks. Dealer replaced fingerprint sensor module as best guess repair but could not confirm it was the definitive cause. Battery replacement was denied as battery did not meet Hyundai's replacement threshold despite documented drain. Service technician verbally acknowledged this is a known issue across 2025 Hyundai Santa Fe vehicles. DTCs C173300 Undervoltage Detected were found on both front door handle sensor modules. Concerned about long term battery health and potential for repeated drain leaving vehicle inoperable."