NHTSA Complaint #11507630 — 2016 KIA SOUL

My 2016 Kia Soul began having acceleration problems mid-December 2022, around 100k miles. I took my car to Kia Service and was told the ECU needed to be updated and that was most likely the cause of the problem. I received the update on 12/14/2022. My car drove a little better for two days but began experiencing the same acceleration issues. I couldn't go over 60 mph on the interstate. It also seemed to be burning gas fast. Although a diagnostic test was attempted twice, there were no findings since the engine light still hadn't come on. It wasn't until 2 months later, 2/11/2023, that my car stalled out on the interstate at 10:00pm at night. I had it towed to Kia and they confirmed the same thing that my reader did on 2/12/23: engine code P1326, knock sensor. On 2/16/23, Kia ran a diagnostic test and came up with the same code, however, they said it is my catalytic converter that needs to be replaced, for approximately $3100. I've read hundreds of reports at this point about the same issues, and they all say the catalytic converter ends up not being the fix or has to be replaced multiple times. It seems like Kia is just determined to not recall these vehicles even though they seem to be a huge safety & liability concern at this point.