i don't agree with the gas comment, I think it can deal with the gas
the only time I got a precat code was when I had a bad sensor when I got the car
come to SZ06 and going out to Indiana, car starts to throw P0420 about half way out and all the way back, with in a few weeks I start getting a code P0430 then they went away completely. All I can figure is the gas was the issue as after a tank or two of CT gas again the code have not come back since
