Frontier XE King Cab 2WD V6-3.3L (VG33E) (2001)
Oxygen Sensor: Description and Operation
Heated Oxygen Sensor 1 (Front)
COMPONENT DESCRIPTION
The heated oxygen sensor 1 (front) is placed into the front tube. It detects the amount of oxygen in the exhaust gas compared to the outside air. The
heated oxygen sensor 1 (front) has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1 V in richer
conditions to 0 V in leaner conditions. The heated oxygen sensor 1 (front) 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 1 V to 0 V.
System Description
Heated Oxygen Sensor 1 Heater (Front)
Heated Oxygen Sensor 2 (Rear)
COMPONENT DESCRIPTION