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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1165 (Engine Control System - Qr25DE) >> DTC P1148: Closed Loop Control >> Diagnostic Trouble Code (DTC) Confirmation Procedure (A/T MODELS ULEV AND M/T MODELS) >> Testing Condition: >> With CONSULT-II

With CONSULT-II

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start engine and warm it up to normal operating temperature.
  2. Select "DATA MONITOR" mode with CONSULT-II.
  3. Hold engine speed at 2, 000 RPM and check one of the following.
    • "HO2S1 (B1)" voltage should go above 0.70V at least once.
    • "HO2S1 (B1)" voltage should go below 0.21V at least once.

      If the check result is NG, perform "DIAGNOSTIC PROCEDURE (A/T MODELS ULEV AND M/T MODELS) ".

      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 1: Displaying Data Monitor Mode With Consult-II
    G00778207Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: B/FUEL SCHDL, ENG Speed, Selector Lever & VHCL Speed Specifications
    G00778208Courtesy of NISSAN MOTOR CO., U.S.A.

    During this test, P0134 may be displayed on CONSULT-II screen.

  6. If DTC is detected, go to "DIAGNOSTIC PROCEDURE (A/T MODELS ULEV AND M/T MODELS) ".