Sub-Heated Oxygen Sensor

DESCRIPTION
The Sub-Heated Oxygen Sensor (Sub-HO2S) is located on the exhaust system, after the Three Way Convertor and detects the concentration of oxygen in the exhaust gases.

CONSTRUCTION
The Sub-HO2S consists of the zirconia element (with thin platinum surface coating) which generates electromotive force, a lead wire which provides a voltage signal to the PCM, a heater which promotes activation of the zirconia element, lead wires for the heater power and ground circuit and cover and housing which protect the zirconia element from damage.