Oxygen sensors produce a voltage between approx 0.1 (lean) and 0.9 vdc (rich) depending on the oxygen content of the exhaust stream. In a normally running engine the upstream O2 sensor voltage should rapidly fluctuate from approx 0.1 to 0.9 vdc. The downstream O2 sensor voltage should be steady at approx 0.5 vdc if the catcon is functional.Sensor 2 bank 1 only measures Voltage and short term fuel trim which it says N/A. Should it be measuring current as well? This is why I think I need a different app for scanning live data. I'd even be willing to pay for an app that does this.