Car Shaking When Idling and Check Engine Light On
If your car is shaking when idling and the check engine light is on, it could be indicative of a serious underlying issue. Here are some of the most common causes and what you can do about it:
1. Engine Misfire
An engine misfire occurs when one or more of the engine’s cylinders are not firing properly. This can cause the engine to shake and vibrate, and it can also lead to reduced power and fuel efficiency. The most common cause of an engine misfire is a faulty spark plug or ignition coil. Other potential causes include a vacuum leak, a clogged fuel injector, or a problem with the engine’s timing.
2. Vacuum Leak
A vacuum leak can occur anywhere in the engine’s intake system. This can cause the engine to run lean, which can lead to shaking and idling problems. A vacuum leak can also cause the check engine light to come on. The most common cause of a vacuum leak is a cracked or damaged hose. Other potential causes include a loose intake manifold gasket or a faulty PCV valve.
3. Fuel Injector Problems
Fuel injectors are responsible for delivering fuel to the engine’s cylinders. A clogged or faulty fuel injector can cause the engine to run lean or rich, which can lead to shaking and idling problems. The most common cause of a fuel injector problem is a buildup of carbon deposits. Other potential causes include a faulty electrical connection or a problem with the fuel injector’s solenoid.
4. Ignition Coil Problems
The ignition coil is responsible for providing the spark that ignites the air-fuel mixture in the engine’s cylinders. A faulty ignition coil can cause the engine to misfire, which can lead to shaking and idling problems. The most common cause of an ignition coil problem is a faulty electrical connection. Other potential causes include a damaged coil or a problem with the coil’s driver circuit.
5. Engine Mounts
Engine mounts are responsible for holding the engine in place. Worn or damaged engine mounts can allow the engine to move around excessively, which can cause shaking and idling problems. The most common cause of worn engine mounts is age and wear. Other potential causes include excessive vibration or a hard impact.
What to Do If Your Car Is Shaking When Idling and the Check Engine Light Is On
If your car is shaking when idling and the check engine light is on, it’s important to get it checked out by a qualified mechanic as soon as possible. The mechanic will be able to diagnose the problem and recommend the appropriate repairs. In some cases, the problem may be minor and can be fixed quickly and easily. In other cases, the problem may be more serious and require more extensive repairs.
Here are some tips for preventing car shaking when idling and the check engine light from coming on:
- Keep up with regular maintenance, including oil changes, tire rotations, and spark plug replacements.
- Avoid driving over rough roads or potholes.
- Don’t overload your car.
- If you notice any unusual noises or vibrations, get your car checked out by a mechanic as soon as possible.
By following these tips, you can help keep your car running smoothly and prevent costly repairs.
