Check Engine Light On problems of the 2015 Mitsubishi Outlander

At only 76,000 miles, my vehicle started to shudder when going anywhere from 10 mph-40 mph. This started when I was on a city street but continued on the highway. There is a lag in acceleration when going from neutral to drive. My transmission service light and check engine light went on so, I took the car in to a Mitsubishi dealership and they notified me that after the diagnostic test and test driving it, they simply had to reset the sensor. After leaving the dealership, the transmission service light went on and my car was still shuddering when trying to accelerate. After getting a transmission service, which is what I was advised to do by the Mitsubishi mechanics, the problem still persisted. I bought this car used from the dealership with only 40,000 miles. At 76,000 there should not be any major transmission or engine issues. I am now unable to drive my car in fear that I will end up in a car accident.

During initial acceleration from a standstill, or when accelerating again after either constant speed operation or coasting the transmission will delay in the vehicle accelerating. While at 60-65 mph the vehicle will fluctuate in rpm and try to accelerate on its own. The service transmission light came on and the check engine light has been going off and on since the vehicle was purchased in October 2017. When bringing it in for service dealer says there is nothing wrong. I went to autozone when the check engine light went on and it is stating the catalytic converter bank 1 has issues. So when I parked it this morning 4-24-18 because of the light going one for the transmission, I tried starting it and it started but hesitated and then all the check engine lights went off. I believe there is something up with the ecu too. I know there are recalls for 2015 Outlander sports but why not mine when I am having the same issues. Thank you.