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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (1 Of 3)) >> DTC/Circuit Diagnosis >> DTC P0137, P0157: Ho2S2 >> DTC Logic >> DTC Confirmation Procedure

DTC Confirmation Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. INSPECTION START

    Will CONSULT be used?

    Will CONSULT be used?

    YES 

    GO TO STEP 2. 

    NO 

    GO TO STEP 5. 

  2. PRECONDITIONING

    If DTC confirmation Procedure has been previously conducted, always perform the following 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 STEP 3. 

  3. PERFORM DTC CONFIRMATION PROCEDURE

    G-20With CONSULT 

    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. 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. 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).

    9. Open engine hood.
    10. Select "HO2S2 (B1) P1147" (for DTC P0137) or "HO2S2 (B2) P1167" (for DTC P0157) of "HO2S2" in "DTC WORK SUPPORT" mode with CONSULT.
    11. Follow the instruction of CONSULT display.
      NOTE:

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

    12. Touch "SELF-DIAG RESULTS".

    Which is displayed on CONSULT screen?

    OK 

    INSPECTION END

    NG 

    Proceed to DIAGNOSIS PROCEDURE .

    CAN NOT BE DIAGNOSED 

    GO TO STEP 4. 

  4. 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 STEP 3. 

  5. PERFORM COMPONENT FUNCTION CHECK

    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 .