Speaking of O2 sensors:

I have an '03 Accord sedan, I4 & 5AT, 48,000 miles, twice in the past
few months my Engine light has come on twice. First time was right after
I bought gas and noticed the gas guy (this is NJ, we can't pump our own
gas here) didn't turn the cap so it clicked. I opened the gas cap and
replaced it making sure I heard several clicks. The Engine light went
off after 3 ON/OFF cycles.

The 2nd time was about 10 days ago, not immediately after buying gas. I
went thru the same drill and the Engine light went off after 3 ON/OFF
cycles. This time, however, I hooked up my OBD II Data Recorder & laptop
computer, which told me my last DTC P0141, which says "O2 Sensor Heater
Circuit Malfunction (Bank 1 Sensor 2)" (the one after the cat). So I
guess I'm looking at replacing the sensor. My inclination is to buy an
OEM sensor instead of the various ones I see online, e.g., with 2/3/4
leads (and no connector).

Any opinions/advice?