Purchase Toyota Sienna Vapor Canister Purge Solenoid & Toyota Sienna Purge Valve Replacement Cost. Discover Toyota Sienna Canister Purge Valve Solenoid. Maintaining the vapor canister purge solenoid in your Toyota Sienna is essential for preventing fuel vapor leaks and ensuring optimal performance. Regularly inspecting for cracks or damage and listening for unusual clicking sounds during engine operation can indicate when a replacement is necessary. To extend the lifespan, avoid overfilling your fuel tank, as this can flood the canister with liquid fuel. When selecting a new solenoid, opt for OEM-quality parts that promise durability and a perfect fit, tailored to your Sienna model. Simple installation tips include ensuring the engine is cool and disconnecting the battery to avoid electrical complications. By choosing the right part and adhering to these maintenance tips, you can enhance your Sienna's fuel efficiency and contribute to a cleaner emission system.