EVAP Vent Valve

This procedure replaces the EVAP vent valve on the 2017 Maserati Levante 3.0L V6 Twin Turbo, located in the rear near the fuel tank, to restore proper evaporative emissions system operation.

Warnings

Tools required

Parts

• EVAP vent valve × 1 — Use OEM specification
• EVAP hose clamps (if damaged) × 2 — Spring-type hose clamps

Preparation

1. Park vehicle on level surface and apply parking brake
2. Place wheel chocks at front wheels
3. If equipped with air suspension, set to normal height mode
4. Allow engine to cool completely if recently operated
5. Clear any stored EVAP system diagnostic codes and note them for reference
6. Raise rear of vehicle and support securely on jack stands at manufacturer-approved lift points
7. Remove right rear wheel for improved access (optional but recommended)

Procedure

1. 1

   Access EVAP vent valve area
   From underneath the vehicle on the right side, locate the EVAP vent valve assembly near the fuel tank. It is mounted to a bracket ahead of the fuel tank on the frame rail. Remove any protective shields or covers that obstruct access using panel removal tools. The valve has two hoses connected and an electrical connector.
2. 2

   Disconnect electrical connector
   Locate the electrical connector on the EVAP vent valve. Press the release tab and carefully pull the connector straight off the valve. Inspect the connector terminals for corrosion or damage. Do not pull on the wires themselves.
3. 3

   Release vent hose connection
   Identify the vent hose (runs to charcoal canister) connected to the valve inlet port. Using a pick or small screwdriver, carefully release the spring-type hose clamp by squeezing or prying the tabs. Slide the clamp back on the hose away from the valve. Twist and pull the hose off the valve port. Expect some residual fuel vapor odor.
   ⚠Fuel vapors will be released when disconnecting hoses. Ensure adequate ventilation.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
4. 4

   Release atmospheric vent hose
   Locate the atmospheric vent hose (typically has a filter or opens to atmosphere) on the outlet port of the valve. Release the hose clamp using the same method as the previous step. Slide the clamp back and remove the hose from the valve. Note the orientation of hoses for reinstallation.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
5. 5

   Remove mounting bracket bolt
   Using a 10mm socket, remove the bolt securing the EVAP vent valve to its mounting bracket. The valve may be held by a single bolt or integrated into a bracket assembly. Support the valve as you remove the fastener to prevent it from falling.
   Torque spec

   Bracket Bolts21 Nm (16 lb-ft)
6. 6

   Remove old EVAP vent valve
   Once the mounting bolt is removed, carefully extract the old EVAP vent valve from its bracket. Inspect the mounting bracket for damage or corrosion. Clean the mounting area with a shop towel if debris is present.
7. 7

   Inspect hoses and clamps
   Examine both EVAP hoses for cracks, deterioration, or damage. Check inside the hose ends for blockages or debris. Inspect the hose clamps for proper spring tension; replace if weak, corroded, or damaged. Verify the atmospheric filter (if present) is not clogged.
8. 8

   Install new EVAP vent valve
   Position the new EVAP vent valve into the mounting bracket, ensuring proper orientation. The electrical connector should face in the same direction as the original. Insert the mounting bolt hand-tight initially.
9. 9

   Torque mounting bolt
   Using a torque wrench, tighten the EVAP vent valve mounting bracket bolt to specification. Ensure the valve is seated properly in the bracket and does not shift during tightening.
   Torque spec

   Bracket Bolts21 Nm (16 lb-ft)
10. 10

    Connect atmospheric vent hose
    Push the atmospheric vent hose (outlet side) firmly onto the corresponding port of the new valve until it bottoms out. Slide the hose clamp into position approximately 5-10mm from the end of the hose. Ensure the clamp is positioned over the raised bead on the valve port if present.
    Torque spec

    Hose Clamps3 Nm (2 lb-ft)
11. 11

    Connect vent hose to canister
    Push the vent hose (inlet side from charcoal canister) firmly onto the inlet port of the new valve until fully seated. Position and secure the hose clamp over the connection point. Verify both hoses are fully seated and clamps are properly engaged.
    Torque spec

    Hose Clamps3 Nm (2 lb-ft)
12. 12

    Reconnect electrical connector
    Align the electrical connector with the new EVAP vent valve terminals and push firmly until you hear or feel a positive click. Gently tug on the connector to verify it is locked in place. Ensure no wires are pinched or stressed.
13. 13

    Reinstall shields and lower vehicle
    Reinstall any protective shields or covers removed during disassembly. If the wheel was removed, reinstall it and torque lug nuts to specification (typically 120 Nm but verify in owner's manual). Carefully lower the vehicle from jack stands and remove support equipment.

Reassembly

1. Verify all hose connections are secure and clamps are properly positioned
2. Ensure electrical connector is fully seated and locked
3. Confirm no tools or parts were left in the work area
4. Double-check all mounting hardware is tightened to specification

Verification

• Start the engine and allow it to idle for 2-3 minutes, listening for unusual hissing sounds indicating vacuum leaks
• Using an OBD2 scanner, clear any stored EVAP system codes
• Perform an EVAP system self-test using the scanner if equipped, or drive vehicle through normal operating conditions
• Monitor for return of EVAP-related diagnostic trouble codes (P0440, P0441, P0446, P0455, etc.) over the next 50-100 miles
• Verify the EVAP vent valve operates correctly during key-on and key-off cycles (should hear a faint click)
• Inspect the installation area underneath the vehicle for any signs of leaks or loose connections after test drive

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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