2025 Kia Carnival Hybrid Other or unknown Problems

“My 2025 Kia Carnival Hybrid is experiencing repeated electrical and hybrid battery failures. The battery has died multiple times, and the vehicle has shut off while driving, including at higher speeds. When the vehicle shuts off, all electrical systems reset, warning lights flash, and the dashboard displays “User Authorization” notifications. This creates a serious safety hazard for me and my passengers. The defect has occurred multiple times and remains unresolved despite dealer visits. …”

“While driving at random times, there is no acceleration while pressing the gas pedal. The battery shows low charge and gradually goes down instead of up. Sometimes the “check hybrid system stop safely” warning light comes on. Our safety was put at risk because it has happened while trying to merge on to the freeway or when there is no shoulder or area to stop safely. Since we can only glide no more than 30 mph we can easily cause an accident if we are not able to exit the road safely. …”

“I was driving on a secondary road that has a 45 MPH speed limit when the vehicle decelerated to 31 MPH on its own. I could not make it go faster with any application of the accelerator. This lasted for about 5 minutes. I called the dealer service and they said it was probably a glitch and they could not investigate unless I left the vehicle with them until they could reproduce it. One unusual fact is that it was very cold the morning it happened, 9 degrees fahrenheit. I believe this could be very dangerous, particularly if hit happens on a highway. …”

“In May 2026, after driving through a heavy rainstorm on the highway, the car suddenly cut off cruise control and showed multiple warning lights (for most, if not all assistance systems) and an error message that was some version of check hybrid system. When searching the code it seemed to be related to an electrical short in the hybrid system. I had no electric power to the engine, but the gas functionality still sort of worked, so I could drive, but there was a 2-3 second delay between pushing the gas pedal and getting any acceleration, and said acceleration was minimal. …”

“UNKNOWN. While driving, an alert will pop up Consider taking a break. It is very distracting and actually startles me to the point of almost having had an accident several times. It will pop up several times while driving at random intervals. I have tried to disable it, but cannot. I called the KIA hotline and they said for me to not drive the vehicle, but also, they would not purchase the vehicle back from me. They did not offer any other solutions beyond that. I have talked with the dealership and they do not have a solution. They did not mention this feature when purchasing. …”