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Home >> Infiniti >> 2004 >> G35 Base, 2D Coupe, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 2004 - Engine Control System - Coupe >> DTC P1148, P1168: Closed Loop Control >> Diagnostic Trouble Code (DTC) Confirmation Procedure >> With Consult-II

With Consult-II

  1. Start engine and warm it up to normal operating temperature.
  2. Select "DATA MONITOR" mode with CONSULT-II.
    Fig 1: CONSULT-II Display Screen
    G00720384Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Hold engine speed at 2,000 rpm and check one of the following.
    • "HO2S1 (B1)/(B2)" voltage should go above 0.70V at least once.
    • "HO2S1 (B1)/(B2)" voltage should go below 0.21V at least once.

      If the check result is NG, perform "Diagnostic Procedure ".

      If the check result is OK, perform the following step.

  4. Let engine idle at least 5 minutes.
  5. Maintain the following condition at least 50 consecutive seconds.
    Fig 2: CONSULT-II Display Screen Parameters
    G00720385Courtesy of NISSAN MOTOR CO., U.S.A.

    During this test, P0132 and/or P0152 may be displayed on CONSULT-II screen.

  6. If DTC is detected, go to "Diagnostic Procedure ".
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