oklatom
And, do you have a question? The fuel you put in would not cause that error, a leak failure in your exhaust would. Get if fixed.
Old Man Dirt
10% ethanol by itself would not cause this code. This is cat below efficiency. The only times I have seen this code is when there is a leak in the exhaust system. This could be a bad gasket or an cracked weld. There appears to be a "flex joint" in the area of the cat and that could have blown out (failed).