Is There A Way To Send Too Much Volatge Using An Efie And Burn Up An 02 Sensor?

[95CHERJUST]

well i got home and if i plug the pos side of the mulitmeter into the 02 tuning port on the efie and ground the black it is still saying that voltage is being increased to the 02 with the turn of the knob so i guess its fine but when i first hooked up the efei i can kill the motor i maxed out the 02 knob all the way. i can still do it to the map side of the efie it will kill the motor if i turn it all the way up so not sure what has happened but the white wire is no longer bright white its a dirty white now.