Altima V6-3.5L (VQ35) (2003)
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Oxygen Sensor: Description and Operation
HO2S1 Heater
System Description
Description
The ECM performs ON/OFF control of the heated oxygen sensor 1 heater corresponding to the engine speed and engine coolant temperature. The duty
percent varies with engine coolant temperature when engine is started.
Operation
HO2S2 Heater
System Description
Description
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed, amount of intake air and engine coolant
temperature.
Operation
HO2S1
