Famous Why Is My Check Engine Light Flashing And Car Shaking References. Web common causes include faulty spark plugs and fuel delivery issues. Common causes of a flashing check engine light and car shaking include a cylinder misfire due to issues such as a misfiring engine, bad ignition coil, faulty spark plugs, clogged fuel filter, faulty fuel injector, or a vacuum leak.

In most cases, these plugs work well for up to 100,000 miles and if you do not replace them timely, they are likely to create an issue with the cylinder’s functioning. Web the first reason can be the worn spark plugs. Driving with these issues can lead to further car damage.