TL V6-3.2L (2004)
Oxygen Sensor: Description and Operation
Secondary Heated Oxygen Sensor (Secondary HO2S)
Secondary Heated Oxygen Sensor (Secondary HO2S)
The secondary HO2S detects the oxygen content in the exhaust gas downstream of the warm up three way catalytic converter (WU-TWC), and sends
signals to the ECM/PCM. To stabilize its output, the sensor has an internal heater. The ECM/PCM compares the HO2S output with the A/F sensor
output to determine catalyst efficiency. The secondary HO2S is on the WU-TWC.
