Nissan Rogue (T33) 2021-Present Service Manual: P0138 Ho2s2

Nissan Rogue (T33) 2021-Present Service Manual / Engine :: Engine Control System / Kr15ddt :: Dtc/circuit Diagnosis / P0138 Ho2s2

DTC Description

DTC DETECTION LOGIC

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.

MALFUNCTION A

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

MALFUNCTION B

To judge the malfunctions of heated oxygen sensor 2, ECM monitors whether the minimum voltage of sensor is sufficiently low during the various driving condition such as fuel-cut.

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P0138 00

O2 sensor bank 1 sensor2(B1)

(O2 sensor circuit high voltage bank 1 sensor 2) 		A Diagnosis condition —
Signal (terminal) Heated oxygen sensor 2 signal
Threshold An excessively high voltage from the sensor is sent to ECM
Diagnosis delay time —
B Diagnosis condition —
Signal (terminal) Heated oxygen sensor 2 signal
Threshold The minimum voltage from the sensor is not reached to the specified voltage
Diagnosis delay time —

POSSIBLE CAUSE

P0138-A

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

  • Heated oxygen sensor 2

P0138-B

  • 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.

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

  2. Turn ignition switch ON.

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

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A

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

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

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

  4. Let engine idle for 2 minutes.

  5. Check 1st trip DTC.

Is 1st trip DTC detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO-1>>

With CONSULT: GO TO 3.

NO-2>>

Without CONSULT: GO TO 5.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B

NOTE:

For better results, perform “DTC WORK SUPPORT” at a temperature of 0 to 30°C (32 to 86°F).

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

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

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

  4. Start 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. Make sure that “COOLANT TEMP/S” indication is 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) P1146” of “HO2S2” in “DTC WORK SUPPORT” mode of “ENGINE” using CONSULT.

  9. Follow the instruction of CONSULT.

    NOTE:

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

  10. Touch “SELF-DIAG RESULT”.

Which is displayed on CONSULT

OK>>

INSPECTION END

NG>>

Proceed to DTC Diagnosis Procedure.

CAN NOT BE DIAGNOSED>>

GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B 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 3.

PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

Perform component function check. Refer to Component Function Check.

NOTE:

Use component function check to check the overall function of the heated oxygen sensor 2 circuit. During this check, a 1st trip DTC might not be confirmed.

Is the inspection result normal?

YES-1>>

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

YES-2>>

Confirmation after repair: INSPECTION END

NO>>

Proceed to DTC Diagnosis Procedure.

DTC Diagnosis Procedure

INSPECTION START

Confirm the detected malfunction (A or B). DTC Description

Which malfunction is detected?

A>>

GO TO 2.

B>>

GO TO 7.

CHECK HO2S2 CONNECTOR FOR WATER

  1. Turn ignition switch OFF.

  2. Disconnect heated oxygen sensor 2 harness connector.

  3. Check connectors for water.

Water should not exist.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

CHECK HO2S2 GROUND CIRCUIT

  1. Disconnect ECM harness connector.

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

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

  3. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

CHECK HO2S2 INPUT SIGNAL CIRCUIT

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

    + − Continuity
    HO2S2 ECM
    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.

    + − Continuity
    HO2S2
    Connector Terminal
    F67 2 Ground Not existed
    + − Continuity
    ECM
    Connector Terminal
    F71 92 Ground Not existed

  3. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace error-detected parts.

CHECK HEATED OXYGEN SENSOR 2

Check the heated oxygen sensor 2. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 6.

REPLACE HEATED OXYGEN SENSOR 2

Replace heated oxygen sensor 2. Refer to Exploded View.

>>

INSPECTION END

CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE

  1. Clear the mixture ratio self-learning value. Refer to Description.

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

Is the 1st trip DTC P0172 detected? Is it difficult to start engine?

YES>>

Perform trouble diagnosis for DTC P0172. DTC Description

NO>>

GO TO 8.

CHECK HO2S2 GROUND CIRCUIT

  1. Turn ignition switch OFF.

  2. Disconnect heated oxygen sensor 2 harness connector.

  3. Disconnect ECM harness connector.

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

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

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

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Repair or replace error-detected parts.

CHECK HO2S2 INPUT SIGNAL CIRCUIT

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

    + − Continuity
    HO2S2 ECM
    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.

    + − Continuity
    HO2S2
    Connector Terminal
    F67 2 Ground Not existed
    + − Continuity
    ECM
    Connector Terminal
    F71 92 Ground Not existed

  3. Also check harness for short to power.

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

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

CHECK HEATED OXYGEN SENSOR 2

Check the heated oxygen sensor 2. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

GO TO 11.

REPLACE HEATED OXYGEN SENSOR 2

Replace heated oxygen sensor 2. Refer to Exploded View.

>>

INSPECTION END

    P0137 Ho2s2
    DTC Description DTC DETECTION LOGICThe 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 c...
    P0139 Ho2s2
    DTC Description DTC DETECTION LOGICThe 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 c...

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