Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HEATED OXYGEN SENSOR 2 HEATER

Turn ignition switch OFF.
Disconnect heated oxygen sensor 2 harness connector.

Check resistance between HO2S2 terminals as per the following.

+	-	Resistance
Heated oxygen sensor 2
Terminal
1	2	3.4 - 4.4 Ω [at 25°C (77°F)]
3	1	∞Ω (Continuity should not exist)
	2
	4
4	1
	2
	3

Is the inspection result normal?

YES

INSPECTION END

Replace malfunctioning heated oxygen sensor 2. Refer to REMOVAL AND INSTALLATION (BANK 2) , REMOVAL AND INSTALLATION (BANK 1) .