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Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (Engine Control System) >> DTC P1271, P1281: A/F Sensor 1 >> DTC Confirmation Procedure >> With CONSULT-II
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With CONSULT-II

WARNING: This page is about a different car, the 2004 Nissan Quest. 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 "A/F SEN1 (B1)" or "A/F SEN1 (B2)" in "DATA MONITOR" mode with CONSULT-II.
  3. Check "A/F SEN1 (B1)" or "A/F SEN1 (B2)" indication.

    If the indication is constantly approx. 0V, go to DIAGNOSTIC PROCEDURE  .

    If the indication is not constantly approx. 0V, go to next step.

  4. Turn ignition switch OFF, wait at least 10 seconds and then restart engine.
  5. Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine.
  6. Maintain the following conditions for about 20 consecutive seconds.
    Fig 1: Displaying Data Monitor
    G00884230Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Engine Speed Specification
    G00884231Courtesy of NISSAN MOTOR CO., U.S.A.
    NOTE:
    • Keep the accelerator pedal as steady as possible during the cruising.
    • If this procedure is not completed within 1 minute after restarting engine at step 4, return to step 4.
  7. If 1st trip DTC is displayed, go to DIAGNOSTIC PROCEDURE  .
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