Engine Misfire:
* Causes: This is the most frequent reason for shaking and an illuminated engine light. It means one or more cylinders aren't firing properly, leading to uneven power output. This could be caused by:
* Spark plug problems: Worn or fouled spark plugs.
* Ignition coil issues: Faulty coil preventing proper spark delivery.
* Fuel injector malfunctions: Clogged or failing injectors.
* Compression loss: Damaged valves, worn piston rings, or a blown head gasket.
* Bad fuel: Contaminated or low-quality fuel.
Other Potential Issues:
* Vacuum leak: A leak in the intake manifold or other vacuum lines can disrupt engine operation.
* Engine mounts: Worn engine mounts allow the engine to vibrate excessively.
* Transmission problems: Issues with the transmission, like a slipping clutch or failing torque converter, can cause shaking.
* Suspension problems: Worn suspension components can contribute to vibrations, though they usually don't trigger the engine light.
What to do:
1. Don't ignore the issue: A shaking car with an engine light on is a clear sign of a potential problem that could worsen and become more expensive to fix.
2. Read the codes: Use an OBD-II code reader to read the trouble codes stored in your car's computer. These codes can give you valuable clues about the specific issue.
3. Consult a mechanic: Take your car to a trusted mechanic for a diagnosis and repair. They can properly inspect the engine and determine the root cause of the problem.
Important Note: Ignoring a shaking car with an engine light on can lead to more serious damage and potentially hazardous driving conditions. Seek professional help as soon as possible.
