Heated Oxygen Sensor (Ho2S)

WARNING: This page is about a different car, the 1997 Mercury Mountaineer. However, it is still accessible from the selected car via links, so may be relevant.

HO2S SPECIFICATIONS

Condition

⁽¹⁾ Voltage

Rich

Increases

Lean

Decreases

⁽¹⁾	Measure between oxygen sensor connector and ground. Voltage should toggle above and below 0.45 volt when system in closed loop. See the TESTS W/CODES article for terminal identification.