This procedure replaces the EVAP vent valve (canister vent solenoid) on a 2015-2020 Ford F-150 with the 3.5L EcoBoost engine, which controls the purging of fuel vapors from the evaporative emissions system.

Warnings

Tools required

Parts

• EVAP canister vent valve/solenoid × 1 — Use OEM specification or Motorcraft CX-2443

Preparation

1. Park vehicle on level ground and engage parking brake
2. Disconnect negative battery terminal and wait 2 minutes for system depressurization
3. Raise rear of vehicle and secure on jack stands rated for vehicle weight
4. Allow exhaust system to cool completely if vehicle was recently driven
5. Locate EVAP canister assembly on driver side frame rail forward of fuel tank

Procedure

1. 1

   Access the EVAP canister area
   Position yourself under the vehicle on the driver side. The EVAP canister and vent valve are mounted to the frame rail forward of the fuel tank. Use a shop light to clearly identify the canister assembly and the vent valve solenoid mounted to it or nearby.
2. 2

   Disconnect electrical connector
   Locate the electrical connector on the EVAP vent valve. Press the locking tab and pull the connector straight off the valve. If the connector is difficult to remove due to corrosion, gently wiggle it while pulling. Do not pull on the wiring harness itself.
3. 3

   Disconnect vent hose
   Identify the fresh air vent hose connected to the valve outlet (typically the side facing outward/down). Press the quick-connect release tabs or squeeze the hose clamp depending on your specific configuration, then pull the hose off the valve fitting. Inspect the hose end for damage or cracking.
   Torque spec

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

   Disconnect canister hose
   Locate the vapor hose connecting the valve to the EVAP canister. This is typically a quick-connect fitting. Press the release tabs or use a flat-blade screwdriver to depress the locking mechanism, then pull the hose away from the valve. Note the orientation of the valve for installation.
5. 5

   Remove mounting hardware
   Using a 10mm socket, remove the mounting bolt(s) securing the vent valve to its bracket or the canister assembly. Some configurations use a single bolt while others use a mounting bracket with two bolts. Keep hardware organized for reinstallation.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
6. 6

   Remove old EVAP vent valve
   Carefully pull the vent valve from its mounting location. If the valve is stuck due to corrosion or debris, gently twist while pulling. Inspect the mounting area and clean any dirt, debris, or corrosion from the bracket and surrounding area.
7. 7

   Install new EVAP vent valve
   Position the new vent valve in the mounting bracket, ensuring it is oriented the same way as the original (fresh air port facing downward/outward). Hand-thread the mounting bolt(s) to prevent cross-threading. Verify the valve is seated properly in the bracket before tightening.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
8. 8

   Torque mounting hardware
   Using a torque wrench, tighten the mounting bolt(s) to 31 Nm (23 lb-ft). Ensure the valve does not rotate or shift during tightening. The valve should be firmly secured but not over-tightened which could crack the plastic housing.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
9. 9

   Reconnect canister hose
   Push the vapor hose from the canister onto the appropriate port of the new valve until you hear or feel a click indicating the quick-connect is fully seated. Gently tug on the hose to verify it is locked in place.
10. 10

    Reconnect vent hose
    Attach the fresh air vent hose to the outlet port of the valve. Push the hose onto the fitting until fully seated. If using a hose clamp, position it properly and tighten to 3 Nm (2 lb-ft) using a torque wrench or small socket. Ensure the hose is not kinked or pinched.
    Torque spec

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

    Reconnect electrical connector
    Push the electrical connector onto the vent valve solenoid until it clicks into place. Verify the locking tab is fully engaged. Give the connector a gentle tug to ensure it is secured.
12. 12

    Lower vehicle and reconnect battery
    Carefully lower the vehicle from the jack stands. Reconnect the negative battery terminal and tighten securely. This will restore power to the vehicle systems and allow for testing.

Reassembly

1. Ensure all hose connections are fully seated and locked in place
2. Verify electrical connector is properly engaged with locking tab secure
3. Double-check that the vent valve is securely mounted and all bolts are torqued to specification
4. Confirm no tools or parts were left in the work area under the vehicle

Verification

• Start the engine and verify no Check Engine Light or EVAP-related diagnostic trouble codes (P0440, P0441, P0446, P0455, P0456) are present using an OBD-II scanner
• Listen for proper clicking sound from the vent valve solenoid during key-on self-test (may be faint)
• Perform an EVAP system monitor drive cycle: drive vehicle at steady highway speed for 10-15 minutes, then allow to idle for several minutes
• Re-scan for codes after drive cycle to ensure EVAP system is operating correctly
• Visually inspect under vehicle for any disconnected hoses or loose components
• Verify no fuel vapor odors are present around the EVAP canister area

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