P0318 O2 sensor circuit high voltage bank 1 sensor 2

Hello Sir,

Recently I have subject code comes on car dashboard. Three light came ON DASHBOARD
1) check engine
2) 4WD
3) VSC

Somebody advise me to use the super gas twice to check if works. I am waiting for the gas to be burn all then I will fill up the super gas with fuel injector.
I notice the light came on only when ever I on highway running and speed is more the 50 miles/hour after a while.

Can you please advise your expertise to eleimate the problem and avoid such issue.

Thanks
Asif