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What does it mean when the engine light is on?

When the engine light (also known as the check engine light) is on, it means the car's computer has detected a problem with the engine or emissions system.

Here's a breakdown:

* It's not always a serious issue: The engine light could be triggered by something minor, like a loose gas cap.

* It's a warning sign: The light indicates a problem that needs attention. Ignoring it can lead to more serious issues and potentially damage your car.

* You need to get it checked: The only way to know the exact cause is to have the car diagnosed by a mechanic.

* Don't panic: While it's important to get it checked, the engine light doesn't necessarily mean your car is about to break down.

Possible reasons for the engine light to turn on:

* Oxygen sensor malfunction

* Catalytic converter issue

* Spark plug problem

* Faulty mass air flow sensor

* Loose gas cap

* Evaporative emissions system leak

* Engine misfire

What to do when the engine light comes on:

1. Don't ignore it: It's important to address the issue as soon as possible.

2. Check your gas cap: A loose gas cap can trigger the engine light. Tighten it and see if the light goes off.

3. Get a diagnostic code: A mechanic can use a code reader to determine the specific fault code that triggered the light.

4. Have the issue repaired: Once the problem is identified, have it fixed by a qualified mechanic.

In short: The engine light is a warning signal that you should take seriously. Get your car diagnosed and repaired to avoid potential damage and ensure your vehicle is running smoothly.