NHTSA Complaint #11515531 — 2015 KIA SOUL

My 2015 Kia Soul ! has been losing power upon acceleration for around 6 months now. We have had two different mechanic shops attempt repairs. First repair found a broken spark plug. Kia Soul continued to lose power upon acceleration and a second repair shop found a bent engine valve. All engine valves were repaired/replaced. After the engine valve repairs, around a month later, Kia Soul loses all power upon acceleration over 4,000 rpm or at an incline, absolutely no power when pressing the accelerator and this caused an instant safety issue for the owner/driver. The owner/driver was on the highway driving around 70 mph when the Kia Soul lost power and she had to maneuver onto the side of a busy highway three times to shut off the Kia Soul and re-start it to get power again. (Shutting off the vehicle and re-starting it temporarily fixes the power issue.) The owner/driver was almost hit by other cars twice trying to get to the side of the highway since there was absolutely no power and no way to accelerate. There were and are still no warning lights, no engine lights, no codes, absolutely nothing stating that anything is wrong with this Kia Soul. This Kia Soul also dumps 100% of its oil at random times. It will throw engine codes of O-ring 1 and 3 at random times not at the same time as the oil dumping. The owner has checked the oil level if the Kia Soul right before driving the vehicle and she has had the vehicle dump its oil during a drive and go into "limp mode" where it loses its power and will not go over a certain RPM to protect the integrity of the engine. The owner has had this happen twice since a KIA dealership did computer reprogramming after the latest recall. There is absolutely no warning, engine codes with this as well. The last time happened on a highway as well and safety was also and issue trying to get off the highway at 45 mph. There is no warning for when it loses power putting its driver in danger of getting hit by other cars.