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Home >> Infiniti >> 2004 >> M45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P1146, P1166: Ho2S2 >> DTC Confirmation Procedure >> With CONSULT-II
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With CONSULT-II

  1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-II.
    Fig 1: Scan Tool Display - Data Monitor
    G00796317Courtesy of NISSAN MOTOR CO., U.S.A.
  2. Start engine and warm it up to the 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" indicates more than 70 ° C (158°F).

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

  7. Open engine hood.
  8. Select "HO2S2 (B1) P1146" or "HO2S2 (B2) P1166" of "HO2S2" in "DTC WORK SUPPORT" mode with CONSULT-II.
  9. Start engine and following the instruction of CONSULT-II.
    Fig 2: Following Instructions Displayed On Scan Tool
    G00796318Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Make sure that "OK" is displayed after touching "SELF-DIAG RESULTS".

    If "NG" is displayed, refer to DIAGNOSTIC PROCEDURE .

    If "CAN NOT BE DIAGNOSED" is displayed, perform the following.

    1. Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
    2. Return to step 1.
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