Component Inspection (HO2 Sensor 2 Heater)

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD and 2019 Nissan NV2500 HD. 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 (HO2S2) harness connector.

Check resistance between HO2S2 terminals as follows.

Terminal	Resistance
2 and 3	3.4 - 4.4 Ohm [at 25 deg.C (77 deg.F)]
1 and 2, 3, 4	INF.Ohm (Continuity should not exist)
4 and 1, 2, 3	INF.Ohm (Continuity should not exist)

Is the inspection result normal?

YES

INSPECTION END

GO TO 2.

REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning 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 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).
INSPECTION END