Automatic Transmission Control Module problems of the 2019 Subaru Ascent

The contact owns a 2019 Subaru Ascent. The contact stated that while the vehicle was stopped and attempting to accelerate on several occasions, the vehicle jolted forward while shifting from 1st to 2nd gear. The vehicle was taken to the dealer where it was diagnosed that the computer software needed to be updated. The software updated but the failure reoccurred after almost two months. The vehicle was taken to the dealer where it was diagnosed that another software needed to be updated; however, the failure reoccurred after almost two months. The contact believed that the failure was associated with manufacturer recall number: 16-139-22 cvt assembly (wrk-21) warranty extension (tcm reprogramming to prevent cvt chain slip). The manufacturer was notified of the failure. The failure mileage was approximately 106,000.

Vehicle has experienced total loss of power while driving under normal circumstances. This has occurred in a drive-thru, at 45 and 50mph, and also twice during 70mph highway driving. The entire vehicle shuts down and multiple dash board lights illuminate at the time of power loss. I first documented this on 4/7/22 and it randomly occurs every month, once it even happened twice in the same day. I had called the dealership (where I purchased the vehicle and have it serviced) multiple times throughout the spring and summer awaiting parts for the tcm recall with the assumption that this could be the issue. However , my vehicle passed the recall and even after the new tcm was placed on 8/19, I again had the same event on 10/1. Vehicle was taken in on 10/6 for diagnostics on this issue again and nothing found. I do not feel like the dealership has been accurately documenting my issues so I will need to be more persistent in getting someone to address the problem as this could be a serious safety issue.