Oxygen Sensor

HO2S SENSOR VOLTAGE (with engine at operating temperature):

At 3000 RPM 0.5 Volts
During deceleration from 3000 RPM Below 0.5 Volts
Lean Less Than 0.4 Volts
14.7 to 1 Stoichiometric 0.4 - 0.6 Volts
Rich More Than 0.6 Volts

HO2S HEATER RESISTANCE
Between terminals 3 and 4 (black wires) 10 - 40 ohms