3.2TL TYPE S V6-3.2L SOHC (2002)
Oxygen Sensor: Description and Operation
Primary Oxygen Sensor
Primary Heated Oxygen Sensors (Primary HO2S)
The primary HO2S detects the oxygen content in the exhaust gas and sends signals to the PCM which varies the duration of injection accordingly. To
stabilize its output, the sensor has an internal heater. The Primary HO2S is installed in the exhaust manifold.
By controlling the air fuel ratio with primary HO2S and secondary HO2S, the deterioration of the primary HO2S can be evaluated by its feedback
period. When the feedback period exceeds a certain value during stable driving conditions, the sensor is considered deteriorated and the PCM sets a
DTC.
