It is required under federal law as it ensures your evaporative emission system (evap) is functioning correctly. A faulty leak detection pump will cause a check engine warning and is an emission relevant component. The product is generally easy to install and effectively resolves common issues like check engine lights and evap leaks on a variety of vehicles
Evaporative Emissions System Leak Detection Pump - Walmart.com
Many customers report that the installation was straightforward and took less than 10 minutes, and that the part was a direct replacement that fit perfectly.
This pump is designed to test for vapor leaks in any part of the fuel system by pressurizing the evap system and communicating with the vehicle's computer to locate and correct any leaks.
This evaporative emissions system leak detection pump is designed to match the fit and function of the original pump on specified applications, and is engineered for reliable performance and durability. The leak detection pump is a vital component in a vehicle’s evaporative emissions control system (evap), responsible for identifying and signaling fuel vapor leaks. Leak detection pumps provide pressure so the system can be checked for leaks while other evap system valves are closed
