Frontier SE King Cab 4WD L4-2.4L (KA24DE) (1998)
Oxygen Sensor: Description and Operation
Front Heated Oxygen Sensor
COMPONENT DESCRIPTION
The front heated oxygen sensor is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air.
The front heated oxygen sensor has a closed- end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer
conditions to 0V in leaner conditions. The front heated oxygen sensor signal is sent to the ECM. The ECM adjusts the injection pulse duration to
achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.