What are the reasons for the vibration after starting the Magotan car?

[StDiana]

The reasons for the vibration after starting the Magotan car are as follows: 1. Poor quality gasoline that does not meet standards: This is usually caused by refueling with lower-quality gasoline at non-standard gas stations, resulting in insufficient combustion of the air-fuel mixture during engine operation and the engine warning light turning on. This does not affect driving safety but may cause some degree of harm to the engine. 2. Oxygen sensor failure: Modern cars are equipped with two oxygen sensors, one before and one after the three-way catalytic converter. The front oxygen sensor is used to detect the air-fuel ratio under different engine conditions, while the ECU adjusts the fuel injection amount and calculates the ignition timing based on this signal. The rear sensor mainly monitors the performance of the three-way catalytic converter. Therefore, if the oxygen sensor is damaged or the sensor connector is damaged or loose, it can lead to an overly lean or rich air-fuel mixture, causing the warning light to turn on.