P2626 KIA - spectra5 2007

Question

I got code p2626 in my 2007 kia spectra5 .
I checked on the scanner and it shows that code number and the Mechanic told me that i should replace the O2 sensor (upstream).
my question is should I replace the upstream & downstream sensor or only the upstream one.

Thanks

Answer 1

P2626 -02 sensor pumping current trim Bank 1 Sensor

This is for the front 02 sensor, it is the upstream