bank 2 sensor 1 oxygen sensor reference voltage was not within acceptable limits

anyone knows where this sensor is located?

 

Okay i found it but how do i reach it from below? K member and lower control arm seems to be in the way. The other end of the connector is behind the engine between firewall i cant see or reach......
is it safe to drive with an bad o2 sensor? possible engine damage? i have a trip tomorrow about 1k miles. Can i wait till then?