What is a evap leak?

An evaporative emission (EVAP) leak is a common issue in vehicles that occurs when fuel vapor escapes from the fuel system. This can happen due to a variety of reasons, such as a loose or damaged gas cap, a cracked or broken fuel tank, or a leak in the EVAP system components.

EVAP leaks can lead to a decrease in fuel efficiency, as well as potential emissions of harmful gases into the environment. In some cases, a check engine light may illuminate on the dashboard to indicate that there is a problem with the EVAP system.

To diagnose and fix an EVAP leak, a mechanic will typically perform a smoke test to locate the source of the leak. Depending on the severity of the issue, the repair may involve replacing faulty components, such as the gas cap, fuel tank, or EVAP canister.

It is important to address an EVAP leak promptly to prevent further damage to the vehicle and ensure that it remains in compliance with emissions regulations.