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Home >> Infiniti >> 2004 >> FX45 >> Repair and Diagnosis >> External Pages >> Different car >> Section 250 (Engine Control System) >> DTC P1276 & P1286 A/F Sensor 1 >> Overall Function Check
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Overall Function Check

WARNING: This page is about a different car, the 2004 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

Use this procedure to check the overall function of the air fuel ratio (A/F) sensor 1 circuit. During this check, a DTC might not be confirmed.

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 minuts in the suitable gear postion.
    3. NOTE: Never apply brake during releasing the accelerator pedal.
  3. Set D position, then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).
  4. Repeat steps 2 to 3 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 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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