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Home >> Infiniti >> 2021 >> Q60 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (4 Of 7) >> Engine (ECM) >> DTC P0441: EVAP Control System >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK DTC PRIORITY 

    If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform the confirmation procedure (trouble diagnosis) for other DTC.

    Is DTC P2122, P2123, P2127, P2128 or P2138 detected?

    YES

    Perform diagnosis of applicable.

    NO

    GO TO 2.

  2. CHECK EVAP CANISTER 
    1. Turn ignition switch OFF.
    2. Check EVAP canister for cracks.

    Is the inspection result normal?

    YES

    With CONSULT: GO TO 3.

    YES

    Without CONSULT: GO TO 4.

    NO

    Replace EVAP canister. Refer to EVAP CANISTER : Exploded View .

  3. CHECK PURGE FLOW 

    SYMBOL With CONSULT

    1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port.
    2. Start engine and let it idle.
    3. On CONSULT screen, select "ENGINE">>"Active Test">>"PURG VOL CONT/V".
    4. Touch "Qd" and "Qu" on CONSULT screen to adjust "PURG VOL C/V" opening and check vacuum existence.

      PURG VOL C/V

      Vacuum

      100%

      Existed

      0%

      Not existed

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    GO TO 5.

  4. CHECK PURGE FLOW 

    SYMBOL Without CONSULT

    1. Start engine and warm it up to normal operating temperature.
    2. Stop engine.
    3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge. For the location of EVAP service port, Refer to FUEL SYSTEM : Hydraulic Layout .
    4. Start engine and let it idle.

      Do not depress accelerator pedal even slightly.

    5. Check vacuum gauge indication before 60 seconds passed after starting engine.

      Vacuum should not exist.
    6. Revving engine up to 2, 000rpm after 100 seconds passed after starting engine.

      Vacuum should exist.

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    GO TO 5.

  5. CHECK EVAP PURGE LINE 
    1. Turn ignition switch OFF.
    2. Check EVAP purge line for improper connection or disconnection.

      Refer to System Description .

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair it.

  6. CHECK EVAP PURGE HOSE AND PURGE PORT 
    1. Disconnect purge hoses connected to EVAP service port SYMBOL and EVAP canister purge volume control solenoid valve SYMBOL .
      G04074089Courtesy of NISSAN NORTH AMERICA, INC.
    2. Blow air into each hose and EVAP purge port SYMBOL .
    3. Check that air flows freely.
      G04074090Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES

    With CONSULT: GO TO 7.

    YES

    Without CONSULT: GO TO 8.

    NO

    Repair or clean hoses and/or purge port.

  7. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE 

    SYMBOL With CONSULT

    1. Start engine.
    2. On CONSULT screen, select "ENGINE">>"Active Test">>"PURG VOL CONT/V".
    3. Check that engine speed varies according to the valve opening.

    Does engine speed vary according to the valve opening?

    YES

    GO TO 9.

    NO

    GO TO 8.

  8. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE 

    Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    Replace EVAP canister purge volume control solenoid valve. Refer to INTAKE MANIFOLD COLLECTOR : Exploded View .

  9. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR 
    1. Disconnect EVAP control system pressure sensor harness connector. Refer to EVAP CANISTER : Exploded View .
    2. Check connectors for water.

      Water should not exist.

    Is the inspection result normal?

    YES

    GO TO 10.

    NO

    Replace EVAP control system pressure sensor. Refer to EVAP CANISTER : Exploded View .

  10. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION 

    Refer to DTC Description  for DTC P0452, refer to DTC Description  for DTC P0453.

    Is the inspection result normal?

    YES

    GO TO 11.

    NO

    Replace EVAP control system pressure sensor. Refer to EVAP CANISTER : Exploded View .

  11. CHECK RUBBER TUBE FOR CLOGGING 
    1. Disconnect rubber tube connected to EVAP canister vent control valve.
    2. Check the rubber tube for clogging.

    Is the inspection result normal?

    YES

    GO TO 12.

    NO

    Clean the rubber tube using an air blower.

  12. CHECK EVAP CANISTER VENT CONTROL VALVE 

    Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 13.

    NO

    Replace EVAP canister vent control valve. Refer to EVAP CANISTER : Exploded View .

  13. CHECK EVAP PURGE LINE 

    Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.

    Refer to System Description .

    Is the inspection result normal?

    YES

    GO TO 14.

    NO

    Replace it.

  14. CLEAN EVAP PURGE LINE 

    Clean EVAP purge line (pipe and rubber tube) using air blower.

    INSPECTION END

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