The car starts but idles rough. After driving it a few feet the accelerator will stop working. Shows engine codes for a cylinder 2 misfire and a MAF issue. Have tried changing spark plugs, coils, sensors and gaskets and nothing seems to resolve the issue.

Sometimes stalling when stopped or sputtering when accelerating from stopped. Comes and goes but get's more frequent in the drive. Got a code P0131 02 Sensor 1. I replaced it, same issue. I unplug the 02 sensor and it will run. I thought it was the harness on the vehicle and had dealership take a look. They did an overlay on it "as a start". They said it was done, I kept asking about the 02 sensor before pick up. "It's good, we drove it, etc.". After pick up about 12 miles later I stall/sputter. They say it's the ECM and Cat. Converter.

Looking for second opinion.
I've replaced spark plugs, wires, coil. MAF, MAP sensors. Purge valve.