just back probed sensor 1 bank 1 and the needle sweeps!!!!
back probed bank 2 sensor 1 and nada hooked up my live readout and b1 s 1 was switching and b2s1was not ....

people have been swaping the wrong sensor but the correct sensor for the code found.....

i swapped in the assumed good sensor i removed from the bank 1 s1 position that was less than 6 mo old... and the sensor is still not switching .on my live readout but i will back probe it soon.
it was an audi sensor and the wires were really twisted up from the last guy who worked on it. dealer i assume... one turbo was replaced at 10k

any way i am going to disect the harness on this sensor because i think it might be shorted. could this fry the ecu o2 circut????