Helpful Automotive Resources
Evaporative Emission Control (EVAP) System 101: The BasicsThe EVAP system traps smog-forming fuel vapors and prevents them from entering the atmosphere. When there’s a problem—such as a leaking gas cap—somewhere in the system, your car’s primary computer (often referred to as the powertrain control module) will turn on the check engine light. At the same time, the Why Does My Car Smell Like Gas?So, what are you going to do about the problem? To answer that question, you’ll need to find out what’s causing the smell in the first place.
A loose gas cap can cause your car to smell like gas.
4 Potential Reasons Why Your Car Smells Like Gas