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.

[GenesisFitz]

I've been driving for nearly thirty years and have encountered engine shaking with the check engine light on several times. The main causes always revolve around the ignition system and fuel supply issues. Worn spark plugs or faulty ignition coils are the most common culprits—without proper ignition, the engine jerks and vibrates heavily. Another issue is clogged fuel injectors causing uneven fuel delivery, making the engine 'gasp,' or a weak fuel pump leading to unstable power. Faulty sensors like the O2 sensor or mass airflow sensor can trigger the warning light upon detecting abnormalities. Additionally, vacuum leaks disrupt the air-fuel mixture, worsening the shaking. When this happens, don't delay—get to a garage immediately to scan for trouble codes with a diagnostic tool. Ignoring it risks breakdowns, especially on long trips or mountain roads, which can be dangerous. Regular maintenance should include checks on these components.

[KevinFitz]

As a daily commuter who drives every day, I've also encountered this issue. Shaking and warning lights are mostly due to problems with the ignition or fuel system. For example, if the spark plugs are faulty and fail to ignite, the engine will jerk. Clogged fuel injectors with impurities can also cause insufficient fuel supply, making the car shake like it's hiccuping. Additionally, faulty sensors, such as the crankshaft position sensor, can send incorrect signals and trigger the warning light. Vacuum leaks, like small holes, can disrupt the air intake balance. I remember the last time my car's warning light came on and it was shaking. I took it for repairs, and it turned out one of the ignition coils was bad. Replacing it fixed the problem. For safety, don't force the car to keep running. Get it repaired promptly to avoid accidents, especially on highways—be extra careful.

[DelBrianna]

I'm just starting to learn about car maintenance knowledge. Common causes of engine shaking with the malfunction light on include spark plug issues, faulty ignition coils, or clogged fuel injectors leading to incomplete combustion. Sensor failures, such as a bad oxygen sensor, can trigger the engine control system warning light. Vacuum leaks in hoses can also affect engine stability. It's recommended to have a professional shop inspect it for the most reliable diagnosis.