At the end of 2007, Jetta wasted a lot of oil in spring. Who knows what went wrong?

There are five main reasons: 1. The oxygen sensor is not working well, which leads to the wrong judgment of the computer and the long injection time. The possible reasons are that the oxygen sensor is broken or doesn't work, and the air cabin is too dirty and the air intake is not enough, which leads to the wrong judgment. Need professional testing instruments. ) 2. The throttle valve is too dirty, and the large opening leads to long fuel injection time. 3. The nozzle is not tightly sealed, oil drops when it is not working, and the oil pressure is too high due to dirty or bad oil pressure regulator. 4. The valve of the activated carbon tank is always open, causing the fuel air in the fuel tank to go to the air inlet. 5. The internal program of the computer is incorrect or the computer is damaged. Where 1 and 2 are common failure points.