Heated Oxygen Sensor 2 Heater

WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

Heated oxygen sensor 2 heater is integrated in the sensor.

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.

Condition

Heated oxygen sensor 2 heater

Above 7, 500 rpm

OFF

Below 7, 500 rpm after the following conditions are met.

Engine: After warming up
Keeping the engine speed between 3, 500 and 4, 000 rpm for 1 minute and at idle for 1 minute under no load