Heated Oxygen Sensor 2 Heater

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Check resistance between HO2S2 terminals as per the following.

Terminal No.	Resistance [at 25°C (77°F)]
2 and 3	8 - 10 Ω
1 and 2, 3, 4	∞ Ω (Continuity should not exist)
4 and 1, 2, 3	∞ Ω (Continuity should not exist)

Fig 1: Checking Resistance Between HO2S2 Terminals 1, 2, 3 And 4

Courtesy of NISSAN NORTH AMERICA, INC.

If NG, replace heated oxygen sensor 2. Refer to REMOVAL AND INSTALLATION .

CAUTION:

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
Before installing new heated oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [Commercial service tool (J-43897-18 or J-43897-12)] and approved Anti-seize Lubricant (Commercial service tool).