What Causes Car Body Shaking and Engine Light Illumination?

[StEloise]

The main reasons for car body shaking and engine light illumination are: 1. Poor combustion of the engine's air-fuel mixture. When the mixture in the cylinder is too rich, the vehicle may experience knocking and shaking. When the mixture is too lean, the vehicle may exhibit poor acceleration. 2. Malfunctions in the spark plugs, high-voltage wires, or ignition coils. Poor performance of the ignition system or weak spark plug firing can also trigger the engine warning light and cause shaking with insufficient power. 3. Abnormal fuel supply pressure or faults in the intake pressure sensor. Incorrect fuel pump pressure or faulty readings from the intake pressure sensor can lead to body shaking and power loss.