DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HO2S2 POWER SUPPLY CIRCUIT

Disconnect heated oxygen sensor 2 (HO2S2) harness connector.
Turn ignition switch ON.

Check the voltage between HO2S2 harness connector and ground.

+			-	Voltage
HO2S2
Bank	Connector	Terminal
1	F13	3	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO 2.

Repair or replace error-detected parts.

CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between HO2S2 harness connector and ECM harness connector.

+			-		Continuity
HO2S2			ECM
Bank	Connector	Terminal	Connector	Terminal
1	F13	2	F54	7	Existed

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

GO TO 3.

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK HEATED OXYGEN SENSOR 2 HEATER
Refer to Component Inspection .

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

GO TO 4.
REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning heated oxygen sensor 2. Refer to Exploded View .
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).
INSPECTION END