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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Qr25DE >> DTC P1146: Ho2S2 >> Diagnostic Trouble Code (DTC) Confirmation Procedure >> With Consult-II >> Testing Condition:
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Testing Condition:

For the best 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 with CONSULT-II
  2. Start engine and warm it up to the normal operating temperature.
    Fig 1: Displaying Data Monitor Mode With Consult-II
    G00778177Courtesy of NISSAN MOTOR CO., U.S.A.
  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 "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 to 70°C (158°F).

  7. Open engine hood.
  8. Select "HO2S2 (B1) P1146" of "HO2S2" in "DTC WORK SUPPORT" mode with CONSULT-II.
  9. Start engine and following the instruction of CONSULT-II.
    Fig 2: Confirming DTC With Consult-II
    G00778178Courtesy 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  1.