Nissan Rogue (T33) 2021-Present Service Manual: P2271 Ho2s2

DTC Description

The heated oxygen sensor 2 has a much longer switching time between rich and lean than the air fuel ratio (A/F) sensor 1. The oxygen storage capacity of the three way catalyst (manifold) causes the longer switching time.

: 0.71 V

To judge the malfunctions of heated oxygen sensor 2, ECM monitors whether the maximum voltage of the sensor is sufficiently high during various driving conditions such as fuel cut.

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (The heated oxygen sensor 2 circuit is open or shorted.)

• Heated oxygen sensor 2

• Fuel pressure

• Fuel injector

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

TESTING CONDITION:

Check that “COOLANT TEMP/S” indicates between 0°C to 30°C (30°F to 86°F) before conducting following procedure.

Will CONSULT be used?

GO TO 2.

GO TO 5.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Turn ignition switch ON and select “DATA MONITOR” mode of “ENGINE” using CONSULT.

2. Start engine and warm it up to the normal operating temperature.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Restart engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

5. Let engine idle for 1 minute.

6. Check that “COOLANT TEMP/S” indicates more than 70°C (158°F).

   If not, warm up engine and go to next step when “COOLANT TEMP/S” indication reaches 70°C (158°F).

7. Open engine hood.

8. Select “HO2S2 (B1) P1147” in “HO2S2” in “DTC WORK SUPPORT” mode of “ENGINE” using CONSULT.

9. Follow the instruction of CONSULT display.

   NOTE:

   It will take at most 10 minutes until “COMPLETED” is displayed.

10. Touch “SELF-DIAG RESULTS”

Is “OK” displayed on CONSULT screen?

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: GO TO 4.

Refer to DTC Diagnosis Procedure.

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE AGAIN

1. Turn ignition switch OFF and leave the Nissan Ariya vehicle in a cool place (soak the vehicle).

2. Perform DTC confirmation procedure again.

GO TO 2.

ERASE DTC

Erase DTC of ECM.

INSPECTION END

PERFORM COMPONENT FUNCTION CHECK

Perform Component Function Check. Refer to Component Function Check.

Is the inspection result normal?

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: GO TO 6.

Refer to DTC Diagnosis Procedure.

ERASE DTC

Erase DTC of ECM.

INSPECTION END

DTC Diagnosis Procedure

PERFORM AIR FUEL RATIO INITIAL LEARNING

1. Start engine and warm it up to the normal operating temperature.

2. Clear the air fuel ratio initial learning. Refer to Work Procedure.

3. Run engine for at least 10 minutes at idle speed.

Is the 1st trip DTC P0171 detected? Is it difficult to start engine?

Perform trouble diagnosis for DTC P0171. Refer to DTC Diagnosis Procedure.

GO TO 2.

CHECK HEATED OXYGEN SENSOR 2 GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Disconnect heated oxygen sensor 2 (HO2S2) harness connector.

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

   HO2S2		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F67	1	F71	97	Existed

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

Is the inspection result normal?

GO TO 3.

Repair or replace malfunctioning part.

CHECK HO2S2 INPUT SIGNAL CIRCUIT

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

   HO2S2		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F67	2	F71	92	Existed

2. Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and ground.

   HO2S2		—	Continuity
   Connector	Terminal
   F67	2	Ground	Not existed

   ECM		—	Continuity
   Connector	Terminal
   F71	92	Ground	Not existed

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

Is the inspection result normal?

GO TO 4.

Repair or replace malfunctioning part.

CHECK HEATED OXYGEN SENSOR 2

Refer to Component Inspection.

Is the inspection result normal?

INSPECTION END

GO TO 5.

REPLACE HEATED OXYGEN SENSOR 2

Replace heated oxygen sensor 2. Refer to Exploded View.

INSPECTION END