O2 sensor voltages

[Mark #2]

FYI,

volts air/fuel Lambda(open circuit) =====================================
.250 15.0:1 1.02
.375 14.5:1 0.99
.500 14.0:1 0.95
.625 13.5:1 0.92
.750 13.0:1 0.88
.875 12.5:1 0.85
1.000 12.0:1 0.82