Check Engine Light: What It Means and What to Do
The check engine light is one of the most dreaded sights for any driver. It can be a sign of a minor problem, or it can indicate a major issue that could lead to costly repairs. If you see the check engine light come on, it’s important to take action as soon as possible.
What does the check engine light mean?
The check engine light is a warning light that is triggered when the engine control unit (ECU) detects a problem with the engine or emissions system. The ECU is a computer that controls various aspects of the engine, including the air-fuel mixture, spark timing, and emissions. When the ECU detects a problem, it will turn on the check engine light to alert the driver.
There are many different reasons why the check engine light can come on. Some of the most common causes include:
- Loose or faulty gas cap
- Faulty oxygen sensor
- Faulty spark plugs or wires
- Catalytic converter problems
- Engine misfire
- Vacuum leak
What should I do if the check engine light comes on?
If you see the check engine light come on, it’s important to take action as soon as possible. The sooner you address the problem, the less likely it is to cause serious damage to your engine.
Here are some steps to follow if the check engine light comes on:
- Check the gas cap. Make sure it is tight and secure. A loose or faulty gas cap can cause the check engine light to come on.
- Have the code read. An auto repair shop can use a code reader to determine the cause of the check engine light. This will give you a better idea of what needs to be repaired.
- Repair the problem. Once you know the cause of the check engine light, you can have it repaired. This may involve replacing a faulty part, such as an oxygen sensor or spark plugs.
What if I ignore the check engine light?
Ignoring the check engine light is not a good idea. If you ignore the problem, it could lead to serious damage to your engine. In some cases, ignoring the check engine light can even void your warranty.
If you see the check engine light come on, it’s important to take action as soon as possible. The sooner you address the problem, the less likely it is to cause serious damage to your engine and the more likely it is to be a quick and inexpensive repair.
