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Home >> Nissan-Datsun >> 2020 >> Altima SL, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Pr25DD) (1 Of 2) >> System Description >> Component Location >> Engine Control System >> Heated Oxygen Sensor 2 >> Individual Function Within The System
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Individual Function Within The System

Heated Oxygen Sensor 2 

Under normal conditions, heated oxygen sensor 2 is not used for engine control. When A/F sensor 1 is malfunctioning, the signal from heated oxygen sensor 2 is used to control the A/F ratio to the stoichiometric ratio.

Heated Oxygen Sensor 2 Heater 

The heated oxygen sensor 2 heater activates heated oxygen sensor 2.

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