Had two Hondas, my SIL has one. The catalytic 2nd stage O2 sensors kept alarming. Ethanol can damage wide band O2 sensors. My solution was to not use any gas that had ethanol....problem solved. Corn is for eating, not burning (unless you forget the popcorn in the MW). Screw ethanol.
Don’t mention O2 sensors to me. This spawn of Satan ethanol has fried my sensors. My 1999 Toyota has it’s catalytic converter(sp) and sensors as a single, sealed unit. Can’t replace one without replacing the whole d@amnned thing. Looking at an expensive trip to the dealership.
I HATE ethanol and the DemocRATS that think this crap somehow helps the environment. All it does is drive up the cost of food. Stupid SOB’s.