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Home >> Infiniti >> 2005 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P1276, P1286: A/F Sensor 1 >> Overall Function Check >> With GST
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With GST

  1. Start engine and warm it up to normal operating temperature.
  2. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in the suitable gear position.
  3. Set D position, then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).
    NOTE: Never apply brake during releasing the accelerator pedal.
  4. Repeat steps 2 to 3 for five times.
  5. Stop the vehicle and turn ignition switch OFF.
  6. Wait at least 10 seconds and restart engine.
  7. Repeat steps 2 to 3 for five times.
  8. Stop the vehicle and connect GST to the vehicle.
  9. Make sure that no DTC is displayed.

    If the DTC is displayed, go to "DIAGNOSTIC PROCEDURE ".

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