Q: Check Engine Light on 2005 Honda Odyssey Touring Van.

I have a 2005 Odyssey Touring Van. I used Techron fuel injector cleaner to help clean the engine. Later that same evening, my check engine light came on. I went to Valvoline to check the codes, and I was advised that it was a misfire code for all 6 cylinders. I then went to Firestone, and I was told that both of my catalytic converters and my O2 sensor needed to be replaced. Firestone had also just replaced my serpentine belt and starter over the previous 2 weeks. They could not tell me exactly which one needs to be replaced, just that all of it needed to be replaced. I advised no, then went home. Next morning, the check engine light was gone. There was no issue until 3 days later, when I filled up the tank with a higher grade gasoline. Later that day, the check engine light comes back on. Could the Techron and higher grade gasoline be causing the buildup in the engine to breakup and cause the light to come on?