July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
HO2S 1
The scan tool range is 0-1275 mV: The HO2S 1 parameter represents the fuel control HO2S output voltage. When operating in Closed Loop, the HO2S voltage should fluctuate between 10 mV (lean exhaust) and 1000 mV (rich exhaust).