What are the causes of engine shaking and the malfunction indicator light coming on?

[LaFernando]

Engine shaking and the malfunction indicator light coming on can be caused by: 1. Engine carbon deposits: Excessive carbon buildup can intensify shaking, which may be transmitted to the vehicle body, and the engine malfunction light may illuminate; 2. Engine knocking: If low-octane gasoline is used or the engine temperature becomes too high, knocking is highly likely to occur. An engine is a machine that converts other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (such as Stirling engines, steam engines), jet engines, and electric motors. The term engine can refer to both the power-generating device and the entire machine including the power unit.