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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Qr25DE >> DTC P1144: Ho2S1 >> Diagnostic Trouble Code (DTC) Confirmation Procedure >> Testing Condition: >> With CONSULT-II
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With CONSULT-II

  1. Start engine and warm it up to normal operating temperature.
  2. Stop engine and wait at least 5 seconds.
  3. Turn ignition switch ON and select "HO2S1 (B1) P1144" of "HO2S1" in "DTC WORK SUPPORT" mode with CONSULT-II.
  4. Touch "START".
  5. Start engine and let it idle for at least 3 minutes.
    NOTE: Never raise engine speed above 3, 600 RPM after this step. If the engine speed limit is exceeded, return to step 5.
    Fig 1: Selecting HO2S1 (B1) P1144 Mode With Consult-II
    G00778159Courtesy of NISSAN MOTOR CO., U.S.A.
  6. When the following conditions are met, "TESTING" will be displayed on the CONSULT-II screen. Maintain the conditions continuously until "TESTING" changes to "COMPLETED". (It will take approximately 50 seconds or more.)
    Fig 2: ENG Speed, Vehicle Speed, B/FUEL SCHDL & Selector Lever Specifications
    G00778160Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Displaying TESTING On Consult-II Screen
    G00778161Courtesy of NISSAN MOTOR CO., U.S.A.

    If "TESTING" is not displayed after 5 minutes, retry from step 2. 

  7. Make sure that "OK" is displayed after touching "SELF-DIAG RESULTS". If "NG" is displayed, refer to "DIAGNOSTIC PROCEDURE ".
    Fig 4: Displaying COMPLETED On Consult-II Screen
    G00778162Courtesy of NISSAN MOTOR CO., U.S.A.