Quest Minivan GXE V6-3.3L (VG33E) (2002)
Oxygen Sensor: Description and Operation
HEATED OXYGEN SENSOR 1 (FRONT) (CIRCUIT)
Component Description
The heated oxygen sensor 1 (front) is placed into the front tube. 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
Operation
HEATED OXYGEN SENSOR 1 HEATER
HEATED OXYGEN SENSOR 2