Front Heated Oxygen Sensor (Left Bank)

FRONT HEATED OXYGEN SENSOR (Front HO2S) (LEFT BANK) (DTC: P0150)
The front heated oxygen sensor (left bank) is placed into the front tube (left bank). It detects the amount of oxygen in the exhaust gas compared to the outside air. The front heated oxygen sensor (left bank) has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1 volt in richer conditions to 0 volts in leaner conditions. The front heated oxygen sensor (left bank) signal is sent to the Engine Control Module (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 volt to 0 volts.