Are there more than 1 O2 sensors?

Question

I had a rear pre cat O2 sensor replaced about a month ago, now the check engine light is on again and the code is P2629.  Is this the same sensor again?

Answer 1

P2629 - 02 sensor pumping current trim circuit / open Bank 2 Sensor 1

This is sensor 1 which is before the catalytic convertor. Yes this is a faulty or not connected 02 sensor,

 This 02 sensor here is Bank 2 Sensor 1,