3.5RL V6-3474cc 3.5L (2001)
Oxygen Sensor: Description and Operation
Primary Heated Oxygen Sensor (HO2S) (Sensor 1)
The Heated Oxygen Sensors (HO2S) detect the oxygen content in the exhaust gas and signal the PCM. In operation, the PCM receives the signals from
the sensor and varies the duration during which fuel is injected. To stabilize the sensor's output, the sensor has an internal heater. The Right Primary
HO2S (Bank 1, Sensor 1) is installed in the right exhaust manifold, and the Left Primary HO2S (Bank 2, Sensor 1) is installed in the left exhaust
manifold.
