Santa Fe GLS V6-2.7L (2002)
Oxygen Sensor: Description and Operation
HEATED OXYGEN SENSOR (HO(2)S)
The heated oxygen sensor senses the oxygen concentration in exhaust gas and converts it into a voltage which is sent to the PCM. The oxygen sensor
outputs about 0 V when the air fuel ratio is richer than the theoretical ratio, and outputs about 5 V when the ratio is more lean (higher oxygen
concentration in exhaust gas.). The PCM controls the fuel injection ratio based on this signal so that the air fuel ratio is maintained at the stoichiometric
ratio. The oxygen sensor has a heating element which ensures sensor performance during all driving conditions.