EVAP Purge Valve

This procedure covers the removal and replacement of the EVAP purge valve (also called the vacuum switching valve or VSV) on the 2018-2024 Toyota Camry 2.5L I4 engine.

Warnings

Tools required

Parts

• EVAP purge valve (VSV) × 1 — Toyota 25701-21010 or equivalent
• Vacuum hose clamps (if damaged) × 2 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake
2. Turn ignition off and remove key
3. Allow engine to cool completely if recently driven
4. Open hood and secure with prop rod

Procedure

1. 1

   Disconnect battery negative terminal
   Using a 10mm socket, loosen the negative battery terminal bolt and remove the cable. Secure it away from the battery post to prevent accidental reconnection during the procedure.
2. 2

   Locate the EVAP purge valve
   The EVAP purge valve is mounted on a bracket on the driver's side of the engine bay, near the firewall and below the intake manifold. It is a black cylindrical component with two vacuum hoses and an electrical connector attached.
3. 3

   Disconnect electrical connector
   Press the locking tab on the electrical connector and pull it straight off the purge valve. Do not pull on the wires themselves.
4. 4

   Remove vacuum hoses
   Using needle-nose pliers, squeeze and slide the hose clamps back away from the purge valve connections. Carefully twist and pull each vacuum hose off the valve nipples. Note the orientation of the hoses for reassembly - the hose from the intake manifold connects to the side marked 'IN' or with an arrow pointing toward the valve, and the hose from the charcoal canister connects to the 'OUT' port.
   Torque spec

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

   Remove purge valve mounting bolt
   Using a 10mm socket, remove the mounting bolt securing the purge valve to its bracket. Keep the bolt for reinstallation.
6. 6

   Remove purge valve
   Lift the purge valve out of its mounting bracket and remove it from the engine bay. Inspect the vacuum hose ports on the valve for cracks or damage.
7. 7

   Install new purge valve
   Position the new EVAP purge valve into the mounting bracket with the electrical connector facing outward for easy access. Ensure the valve is seated properly in the bracket before installing the bolt.
8. 8

   Install mounting bolt
   Thread the mounting bolt by hand to avoid cross-threading, then tighten to the specified torque. If the bolt secures to a bracket rather than directly to the valve body, use the appropriate torque specification.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
9. 9

   Reconnect vacuum hoses
   Push each vacuum hose firmly onto the correct purge valve nipple until fully seated. The hose from the intake manifold connects to the port typically marked 'IN' (toward the solenoid end), and the canister hose connects to the 'OUT' port. Slide the hose clamps into position over the connections, approximately 5-10mm from the end of each nipple.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
10. 10

    Reconnect electrical connector
    Align the electrical connector with the purge valve terminals and push firmly until you hear or feel a click, indicating the locking tab has engaged. Gently tug on the connector to verify it is locked in place.
11. 11

    Reconnect battery
    Reconnect the negative battery cable to the battery post and tighten the 10mm bolt securely. Ensure the connection is clean and tight.

Reassembly

1. Verify all vacuum hoses are properly connected and hose clamps are positioned correctly
2. Ensure electrical connector is fully seated and locked
3. Confirm no tools or parts are left in the engine bay

Verification

• Start the engine and verify it idles smoothly with no vacuum leaks (no hissing sounds)
• Check that the check engine light does not immediately illuminate
• Use an OBD-II scanner to verify no EVAP-related diagnostic trouble codes are present, or monitor the vehicle through several drive cycles
• Perform a visual inspection to confirm the purge valve is not leaking and all connections are secure
• If codes were present before replacement, they may need to be cleared and the vehicle driven through a complete drive cycle for the system to reset

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