I got that code on my 2007 accord some months back. From what I read it just meant that the O2 sensor just didn't respond quickly enough. It doesn't mean anything is wrong. It just means that the computer didn't receive a signal from the sensor as quickly as it expected to. So I blew it off and haven't seen it since. If I were you I would blow it off. It doesn't mean anything is wrong. It might be an indication that you have a dirty/corroded connection or something but it doesn't mean you have a problem that needs to be addressed.