2006 Toyota Sienna P0051

I had a check engine light in my 06 Toyota Sienna LE and the error code was “P0051: HO2S Heater Control Circuit Low Bank 2 Sensor 1”. I have already replaced the O2 sensor, checked the wires and the connectors, also checked the fuses and all of them seemed to be fine. Has anyone experienced anything like this and got to a solution? Please let me know.