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Home >> Nissan-Datsun >> 2021 >> Sentra S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (1 Of 4) >> DTC/Circuit Diagnosis >> DTC P0136: O2 Sensor 2 Bank 1 >> Confirmation Procedure
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Confirmation Procedure

  1. PRECONDITIONING 

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

    GO TO 2.

  2. DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A 
    1. Start engine and warm it up to the normal operating temperature.
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Restart engine and keep the engine speed between 3, 500 and 4, 000 RPM for at least 1 minute under no load.
    4. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES

    Refer to DTC Diagnosis Procedure .

    NO

    With CONSULT: GO TO 3.

    NO

    Without CONSULT: GO TO 5.

  3. DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-1 

    SYMBOL WITH CONSULT

    Test condition : For better results, perform "DTC WORK SUPPORT" at a temperature of 0 to 30 deg. C (32 to 86 deg. F).

    1. Turn ignition switch ON and select "DATA MONITOR" mode with 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 "COOLAN TEMP/S" indicates more than 70 deg. C (158 deg. F).

      If not, warm up engine and go to next step when "COOLAN TEMP/S" indication reaches 70 deg. C (158 deg. F).

    7. Open engine hood.
    8. Select "O2 (B1) P0136" of "HO2S2" in "DTC WORK SUPPORT" mode with 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".

    Which is displayed on CONSULT screen?

    OK-1

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

    OK-2

    Confirmation after repair: INSPECTION END

    NG

    Refer to DTC Diagnosis Procedure .

    CAN NOT BE DIAGNOSED

    GO TO 4.

  4. DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-2 
    1. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
    2. Perform DTC confirmation procedure again.

    GO TO 3.

  5. PERFORM COMPONENT FUNCTION CHECK-1 

    SYMBOL WITHOUT CONSULT

    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.
    1. Start engine and warm it up to the normal operating temperature.
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Restart 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 1 minute.
    5. Check the voltage between ECM harness connector terminals under the following conditions.

      ECM

      Condition

      Voltage

      Connector

      +

      -

      Terminal

      F25

      77

      76

      Revving up to 4, 000 RPM quickly under no load at least 10 times. (Depress and release the accelerator pedal as quickly as possible.)

      The voltage should be above 0.73 V at least once during this procedure.

      The voltage should be below 0.18 V at least once during this procedure.

    Is the inspection result normal?

    YES

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

    YES

    Confirmation after repair: INSPECTION END

    NO

    GO TO 6.

  6. PERFORM COMPONENT FUNCTION CHECK-2 

    SYMBOL WITHOUT CONSULT

    Check the voltage between ECM harness connector terminals under the following conditions.

    ECM

    Condition

    Voltage

    Connector

    +

    -

    Terminal

    F25

    77

    76

    Keeping engine at idle for 10 minutes.

    The voltage should be above 0.73 V at least once during this procedure.

    The voltage should be below 0.18 V at least once during this procedure.

    Is the inspection result normal?

    YES

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

    YES

    Confirmation after repair: INSPECTION END

    NO

    GO TO 7.

  7. PERFORM COMPONENT FUNCTION CHECK-3 

    Check the voltage between ECM harness connector terminals under the following conditions.

    CAUTION: Always drive vehicle at a safe speed.

    ECM

    Condition

    Voltage

    Connector

    +

    -

    Terminal

    F25

    77

    76

    Coasting from 80 km/h (50 MPH) with selector lever in the D position.

    The voltage should be above 0.73 V at least once during this procedure.

    The voltage should be below 0.18 V at least once during this procedure.

    Is the inspection result normal?

    YES

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

    YES

    Confirmation after repair: INSPECTION END

    NO

    Refer to DTC Diagnosis Procedure .

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