Lexus LX570 fuel smell from A/C while parked with engine running in summer on Lexus LX570

Some vehicle owners report experiencing a fuel smell from the A/C while parked with the engine running in summer, which may indicate a leak in the fuel system. This issue can arise particularly when the A/C is on, suggesting that the smell could be entering the cabin. Additionally, some owners have noted a raw fuel odor near the filler area, which may point to problems with aftermarket fuel tank installations, even if the pipes, cap, and connections appear sound. A gas smell when the fuel tank is full, but not when it's half full or less, has been linked to potential issues around the tank area at the rear of the vehicle. Furthermore, a loose or faulty gas cap can also contribute to this problem. Lastly, malfunctioning components such as the fuel pressure regulator may lead to an imbalance in the fuel mixture, causing unburned fuel to be expelled through the exhaust and resulting in a gas odor. It is recommended that owners inspect the fuel system for leaks and check these components to address the issue promptly.