QX60 fault code in England and finidi: Air leakage in the air intake system.

The reasons are as follows: 1, the fuel tank ventilation valve is normally open; 2. The intake manifold is cracked; 3. The throttle gasket is damaged; 4.DME seal has a problem; 5. There is a problem with crankcase ventilation; 6. The engine body leaks air.

The secondary air inlet "refuels" the throttle. On the one hand, the secondary air intake is for environmental reasons, and the evaporated engine oil will be discharged into the throttle through the air duct to participate in combustion again. On the other hand, the evaporated engine oil is pumped out of the crankcase through the negative pressure of the air inlet to reduce the crankcase pressure. There is a ventilation pipe from the engine crankcase to the throttle. When the engine is hot, the oil evaporates, and the oil and gas enter the throttle through the ventilation pipe. Part of the oil and gas will condense on the throttle valve, resulting in carbon deposition.