Fuel line leaks: If there is a broken, rusted or cracked fuel line supplying gas to the engine, it can cause fuel leaks and a subsequent gas smell in the cabin of a vehicle.
Faulty fuel pressure regulator: A malfunctioning fuel pressure regulator can cause the fuel system to overpressurize, which can lead to fuel leaks and the smell of gas in the vehicle.
Evaporative emission system (EVAP) issues: This system aims to trap and store fuel vapor from escaping into the atmosphere. If there is a breach or fault in the EVAP system, it may result in the smell of gas inside a vehicle.
Fuel tank leaks: If there are holes, rust, or damage to the fuel tank, it can result in fuel leakage, which can generate a gas smell in a vehicle.
Clogged carbon canister: The carbon canister is a part of the EVAP system that stores fuel vapors. If it's clogged or blocked, it can affect its efficiency in capturing gas vapor, potentially causing a gas smell.
Damaged or loose gas cap: A worn or damaged gas cap can fail to seal the fuel tank properly, allowing gas vapor to escape and produce a noticeable smell in the cabin of a vehicle.
Fuel filler neck issues: If the fuel filler neck, where fuel is poured into the vehicle, has a problem or isn't properly sealed, it can result in fuel vapor leaking and producing a gas smell.
