Subaru Code P0037 Oxygen Sensor

Subaru Outback

I replaced my converters and the oxygen sensor but my check engine light is still on. I took it and the code was P0037 bank 1, sensor 2 low voltage ? It is a 2003 Subaru Outback with 2.5.

Subaru Code P0037

– HO2S Heater Control Circuit Low Bank 1 Sensor 2

How to Diagnose Code P0037