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Home › Nissan-Datsun › 2017 › Versa Note SL › Repair and Diagnosis › Engine Performance › System › Engine Control System (DTCS) (1 Of 3) › DTC/Circuit Diagnosis › DTC P0138: Ho2S2 › DTC Logic › DTC Confirmation Procedure

DTC Confirmation Procedure

  1. PRECONDITIONING OF DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A

    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 STEP 2  .

  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 DIAGNOSIS PROCEDURE .

    NO-1 

    With CONSULT: GO TO STEP 3  .

    NO-2 

    Without CONSULT: GO TO STEP 5  .

  3. 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 "COOLAN TEMP/S" indication is more than 70°C (158°F).

      If not, warm up engine and go to next step when "COOLAN 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 DIAGNOSIS PROCEDURE .

    CAN NOT BE DIAGNOSED 

    GO TO STEP 4  .

  4. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B 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 STEP 3  .

  5. 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 

    INSPECTION END

    NO 

    Proceed to DIAGNOSIS PROCEDURE .

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