2025 Kia Carnival Hybrid

The vehicle shows a Driver Assistance System Warning randomly. Then the vehicle is unable to accelerate past ~30MPH. We almost got hit when this happened. The warning does not show up in notifications nor does it show up in diagnostics. It gets reverts back to normal when the vehicle is turned off then turned back on. It seems to reset.

The contact owns a 2025 Kia Carnival Hybrid. The contact stated that while driving at undisclosed speeds, the vehicle hesitated before accelerating while depressing the accelerator pedal. There were no warning lights illuminated. The vehicle was taken to the dealer, who was able to duplicate the failure; however, the vehicle was not diagnosed, and the cause of the failure was not yet determined. The vehicle was not repaired. The manufacturer was made aware of the failure, and a case was opened. The failure mileage was approximately 3,000. The VIN was not available.

The hybrid car intermittently switches into EV mode after coming to a complete stop (e.g., at a traffic signal or after briefly stopping to pick up my child). When this happens, the vehicle does not accelerate properly once back on the road and feels stuck in EV mode, unable to accelerate beyond ~45 mph. This creates a safety concern when merging or crossing intersections.

The Kia Carnival Hybrid wouldn't allow me to accelerate, topping out at 30/31 MPH despite me fully pressing down on the accelerator. It has happened twice now (a few days apart) and can only be resolved by turning the car off and then back on. Compared to similar complaints logged on the NHTSA website, the difference is that this happened when it was roughly 50-60 degrees outside--not during extremely low temperatures as the other examples have described.

The shifter would indicate it's in neutral but the car would think it's in drive. The car was immobilized and could not be moved when hitting the accelerator. This happened in the middle of Baltimore. I had to 'reboot' the car to get it to work, 3-4 times, while sitting in traffic. Problem has surfaced multiple times and is currently at the dealer for this issue. Was recreatable at the dealer. This was after some issue with the hybrid system on the highway where the electrical part of the drive train was inoperable and I had put it in park at a stop light to to try and see if that would fix it. I know the electrical part was inoperable because of how sluggish the car was and the car itself was saying Regen options were not available and the hybrid battery was drained to 0.

I own a 2025 Kia Carnival SX Prestige Hybrid, and the vehicle intermittently fails to exceed 31 mph when the outside temperature is cold, typically in the single digits or low teens. This issue occurs when I use the remote start system and get into the car to leave for work around 6:50 to 7 am. I have not attempted to replicate this without using the remote start. I have taken the vehicle to the dealership, and they are aware of the problem. They have attempted to recreate the issue but were unable to do so. I have also provided them with a video of the situation and have multiple videos documenting the occurrence.

When driving the vehicle it would not accelerate beyond 31 mph. We were in traffic so not being able to drive the speed limit posed a risk of other vehicles hitting us. Also when merging into highway speed traffic this was very unsafe. No warning limits or check engine lights came on and the dealer can not replicate the issue nor can they tell us why this happened.