u/ChefJasonB

I've recently filled with E88 a couple times due to gas costs. E88 was over $1.50 less per gallon. Shortly after running the second tank it threw this code. It's been intermittent since (about 6 months ago) and just threw the code again last week.

Should I just start with O2 sensors on bank 2? Do them all? I really don't think it's the CAT itself.

96k miles, all maintenance on time or early.