What Causes the Fuel Leakage Warning?
2 Answers
The fuel leakage warning is triggered by actual fuel leakage, which can occur due to reasons such as loose fuel line connections, damaged pipelines, or cracked diesel filter canisters causing oil leakage. Below is relevant information about automotive fuel systems: 1. Basic Function: The fuel system's purpose is to supply the engine with a specific quantity of clean, well-atomized gasoline according to its operational requirements, enabling it to mix with a certain amount of air to form a combustible mixture. Additionally, the fuel system must store a considerable amount of gasoline to ensure the vehicle has a substantial driving range; 2. Development History: New fuel-saving technological devices have replaced carburetors that had been in use for decades. The invention and application of gasoline injection technology led to the introduction of electronically controlled fuel injection systems. Particularly with the widespread adoption of multi-valve engines, electronically controlled injection technology has rapidly gained popularity and application.
The fuel leak warning light is on, and the most common reason is that the fuel tank cap isn't tightened or screwed on properly. I always check this first when repairing a car because a poorly sealed cap allows air to enter the system, triggering the alarm. Additionally, if there's a leak in the fuel line, especially near the fuel tank or if the fuel pipe in the engine compartment is damaged, fuel will seep out, and the sensor will detect the pressure change and sound the alarm. I remember once working on a car where the carbon canister in the evaporative emission system was clogged, causing abnormal release of fuel vapors, and the system mistakenly thought there was a leak. Another possibility is that the fuel pump or the sensor itself is faulty and needs careful troubleshooting. Never ignore this kind of warning—fuel leaks pose a fire risk, so it's essential to visit a professional shop as soon as possible. If the light remains on after checking the cap, diagnostic tools will be needed for further inspection.
