Car Shakes When Starting Check Engine Light
What It Means
When your car shakes when starting and the check engine light is on, it usually means that there is a problem with the engine. This could be due to a number of different factors, including:
* **Bad spark plugs:** Spark plugs are responsible for igniting the air-fuel mixture in the engine. When they are worn out or damaged, they can cause the engine to misfire, which can lead to shaking.
* **Dirty fuel injectors:** Fuel injectors are responsible for delivering fuel to the engine. When they are dirty, they can cause the engine to run lean or rich, which can also lead to shaking.
* **Vacuum leak:** A vacuum leak can cause the engine to suck in too much air, which can also lead to shaking.
* **Exhaust system problem:** An exhaust system problem can cause the engine to backfire, which can also lead to shaking.
What to Do
If your car is shaking when starting and the check engine light is on, there are a few things you should do:
1. **Check the spark plugs.** Remove the spark plugs and inspect them for wear or damage. If the spark plugs are worn out or damaged, they should be replaced.
2. **Clean the fuel injectors.** You can clean the fuel injectors yourself using a fuel injector cleaner. Follow the directions on the cleaner bottle.
3. **Check for a vacuum leak.** Inspect the vacuum hoses for cracks or leaks. If you find a leak, replace the hose.
4. **Check the exhaust system.** Look for any holes or leaks in the exhaust system. If you find a hole or leak, have it repaired.
If the Problem Persists
If you have checked all of the above and the problem persists, you should take your car to a mechanic to have it diagnosed. The mechanic will be able to determine the exact cause of the problem and recommend the appropriate course of action.
Conclusion
If your car is shaking when starting and the check engine light is on, it is important to take action to diagnose and fix the problem. By following the steps outlined above, you can help to ensure that your car is running smoothly and safely.
