Wells 4B1964 Evaporative Emissions System Leak Detection Pump

The Wells 4B1964 is a direct-fit replacement Evaporative Emissions System (EVAP) Leak Detection Pump engineered to restore proper function to your vehicle's evaporative emissions control system. The EVAP system is responsible for capturing fuel vapors from the fuel tank and preventing them from being released into the atmosphere, and the leak detection pump plays a critical role in pressurizing the system so the ECM can verify its integrity.

Key Features:

• Designed to meet or exceed OE specifications in form, fit, and function
• Direct-fit replacement for straightforward installation
• Application-specific design ensures proper mounting and connectivity
• Engineered and tested by Wells Vehicle Electronics for maximum reliability and long service life
• Includes OE-style electrical connectors where applicable

Common Symptoms of a Failing EVAP Leak Detection Pump:

• Check Engine light illumination (typically EVAP-related fault codes such as P0440, P0442, P0455)
• Failed emissions inspection
• Fuel odor near the vehicle

Wells Vehicle Electronics is a leading engineer, manufacturer, and supplier of advanced vehicle electronics solutions for both OE and aftermarket replacement applications. Every Wells component is rigorously tested to ensure superior performance, reliability, and ease of installation.