2016 Buick Encore Acceleration problems

Multiple lights came on at once and needed an intake manifold, pvc tube, valve cover, all which were repaired and the car continues to jerk forward intermittently on acceleration and deceleration. *Tr

While traveling at higher speeds (60+ mph), the check engine light will come on and the car will lose significant power in 4th and higher gear. This will present as speed can still be gained although very slowly in 4th gear, speed can be maintained but not gained while in 5th gear, and speed will only be lost while in 6th gear. 3Rd gear and below all work fine. This issue is resolved by turning the car off for a while and then it continues to operate as it should thereafter, however, the check engine light will remain lit for a few days. The main concern is that the car loses the capability to get out of the way in the case of an emergency due to the lack of power while in this state.

Tl* the contact owns a 2016 buick encore. The contact stated that the vehicle would crank unexpectedly while driving at extremely low speeds. The vehicle was equipped with the auto start feature when coming to a complete stop, which could not be disengaged. The contact described the failure as if the ignition were being started while the engine was already running. During the failure, the vehicle would stall and the contact would have to come to a complete stop and restart the engine. George nahas chevrolet (4135...