2022 Kia Carnival electrical system problems

The back tailgate door, when opened, will go up to desired height set in car settings, then slam back down 1/4 to 1/2 of the total height. Turning off auto open and close it continues to do so. When manually pushing the door to the open position, it will continue the problem. We have had numerous incidents of heads being hit by the door, arms and hands have also been hit. We took the car to the dealership and they said the door actuator would be over $2000 to fix.

The contact owns 2022 Kia Carnival LX. The contact stated that while driving at 55 MPH, the engine misfired, and the check engine warning light was illuminated. In addition, the vehicle would shudder when warming up. The vehicle was driven to local repair and diagnosed several times with the same failure, but not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 9,000