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Home › Nissan-Datsun › 2011 › Sentra SE-R › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS P0137 To P0445 (Qr25DE) › DTC P0139, P0159 Ho2S2 › DTC Confirmation Procedure

DTC Confirmation Procedure

  1. INSPECTION START

    Do you have CONSULT-III?

    Do you have CONSULT-III? 

    YES: GO TO 2.

    NO: GO TO  3.

  2. 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.

    TESTING CONDITION: 

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

    GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE

    With CONSULT-III 

    1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-III.
    2. Start engine and warm it up to the normal operating temperature.
    3. Turn ignition switch OFF and wait at least 10 seconds.
    4. Turn ignition switch ON.
    5. Turn ignition switch OFF and wait at least 10 seconds.
    6. Start engine and keep the engine speed between 3, 500 and 4, 000 RPM for at least 1 minute under no load.
    7. Let engine idle for 1 minute.
    8. Make sure that "COOLAN TEMP/S" indicates more than 70°C (158°F).
    9. Drive the vehicle at a speed of 60 km/h (38 MPH) on the suitable gear position and keep the speed.
      CAUTION: Always drive vehicle at a safe speed.
    10. Release the accelerator pedal fully at least 5 seconds.
      CAUTION:
      • Make it the condition that engine brake operates.
      • Always drive vehicle safely.
      • Never apply brake when releasing the accelerator pedal.
    11. Repeat step  9 and  10 at least 8 times.
    12. Check the following item of "DATA MONITOR".
    DATA MONITOR ITEM CHART

    DTC Data monitor item Status
    P0139 HO2 S2 DIAG1 (B1) CMPLT
    HO2 S2 DIAG2 (B1)
    P0159 HO2 S2 DIAG1 (B2)
    HO2 S2 DIAG2 (B2)

    Is "CMPLT" displayed on CONSULT-III screen? 

    YES: GO TO  6.

    NO-1: "CMPLT" are not displayed on DIAG 1: Perform DTC confirmation procedure again.

    NO-2: "CMPLT" are not displayed on DIAG 2: GO TO 4.

  4. PERFORM DTC WORK SUPPORT
    1. Open engine hood.
    2. Select "HO2S2 (B1) P0139" or "HO2S2 (B2) P0159" of "HO2S2" in "DTC WORK SUPPORT" mode with CONSULT-III.
    3. Start engine and follow the instruction of CONSULT-III display.
    NOTE: It will take at most 10 minutes until "COMPLETED" is displayed.

    Is "COMPLETED" displayed on CONSULT-III screen? 

    YES: GO TO  6.

    NO: GO TO 5.

  5. PERFORM DTC CONFIRMATION PROCEDURE AGAIN
    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.

  6. PERFORM SELF-DIAGNOSIS

    With CONSULT-III 

    Perform ECM self-diagnosis.

    Is DTC "P0139" or "P0159" detected? 

    YES: Proceed to "DIAGNOSIS PROCEDURE ".

    NO: INSPECTION END

  7. PERFORM COMPONENT FUNCTION CHECK

    Perform component function check. Refer to "OVERALL 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: INSPECTION END

    NO: Proceed to "DIAGNOSIS PROCEDURE ".

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