Q: A US-spec BMW X5 has traveled more than 60 kilometers, and the engine fault light is on, indicating a fuel tank vapor leak. How should it be repaired?
A: This fault is only found in most US-spec cars, not in Chinese-spec cars. It is mainly to prevent fuel vapor from polluting the atmosphere and detect fuel vapor leakage in the fuel tank. Generally, check whether the fuel tank cap is tightened first, and then check whether the carbon canister and carbon canister solenoid valve are faulty. Usually, the carbon canister of this car is more likely to fail, and if necessary, a new carbon canister needs to be replaced.