LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2004 >> QX56 RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> DTC P0456: EVAP Control System >> DTC Confirmation Procedure >> With Consult-II
April 5, 2026: LEMON Manuals is launched! Read the announcement.

With Consult-II

  1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-II.
  2. Make sure the following conditions are met.

    FUEL LEVEL SE: 0.25 - 1.4V 

    COOLAN TEMP/S: 0 - 32°C (32 - 90°F) 

    FUEL T/TMP SE: 0 - 35°C (32 - 95°F) 

    INT A/TEMP SE: More than 0°C (32°F) 

    If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle) or refilling/draining fuel until the output voltage condition of the "FUEL LEVEL SE" meets within the range above and leave the vehicle for more than 1 hour. Then start from step 1).

  3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
  4. Select "EVAP V/S LEAK P0456/P1456" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT-II.

    Follow the

    Fig 1: Selecting "EVAP SML LEAK P0442/P1442" Of "EVAPORATIVE SYSTEM" In "DTC WORK SUPPORT" Mode With CONSULT-II
    G02691501Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Make sure that "OK" is displayed.

    If "NG" is displayed, refer to DIAGNOSTIC PROCEDURE .

    NOTE:
    • If the engine speed cannot be maintained within the range displayed on CONSULT-II screen, go to BASIC INSPECTION .
    • Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.