Bank 1 is nearest the firewall. Bank 2 is nearest the radiator. The upstream sensors are called LAF sensors. The downstream sensors are called secondary 02 sensors. Bank 1 sensor 2 is the downstream 02 sensor (Honda p/n 36542-RCA-A01) for the bank of cylinders nearest the firewall. This, according to your "code read out" is THE ONE YOU NEED.

The other Honda p/n's are as follows: Bank 2 sensor 1 (upstream near radiator = 36531-RDV-004). Bank 2 sensor 2 =36532-RCA-A51. Bank 1 sensor 1 = 36531-RCA-A02.

Are we confused yet?

 

just FYI...as i've reported in this thread, i finally and successfully replaced my a/f sensors (both upstream) and my CEL has remained off. Now for the bad news. While replacing the rear upstream a/f sensor Bank 1 sensor 1, I must have damaged the power steering pressure hose trying to move it out of the way to gain access to the sensor. The other possibility is that I damaged the p/s hose when replacing the spark plugs on the bank of cylinders nearest the firewall.

Bottom line, I must have been too careless moving the p/s hose because it has sprung a leak...near the p/s pressure switch...where the hose transitions from rubber to metal tubing. It appears the fluid leak is coming from around the metal "clamp" at the transition point.

Now I'm looking at a new p/s pressure hose $150...plus labor to remove/install. First estimates are around $375 from an indy mechanic. I'd sure like to DIY...but the job looks bigger than I'm willing to tackle. A/f sensor was a piece of cake (finally) buy the p/s hose...not so much!!!