The epc light of Volkswagen Golf 4 is on, and the instrument shows the engine fault maintenance station. What's the problem?

Hello, the reason why Volkswagen epc light is on:

1, engine oil problem, possibly adding inferior gasoline.

2. The throttle body is too dirty. This situation requires cleaning the throttle body and then re-matching.

3. If the sideslip light comes on at the same time and the car feels dead, especially the acceleration is weak, it is necessary to replace the "accelerator harness" connector, that is, cut the original wires and reconnect them with new ones according to the wire sequence.

4. There is a leak in the air intake system, which affects the engine adjustment unit to light the epc warning light after checking the problem.

5. There is leakage in the crankcase ventilation system.

6. If the brake light is not on, check the brake switch and circuit. Solution: When the epc indicator light is on, the owner can try to turn it off and restart it to see if the epc indicator light is still on. If the epc indicator light is not on, there may be some faults in the system or circuit of the car, and poor contact may also cause the epc light to be on. ...