Here's what it means when the "Check Engine" light is on:
* There's a problem with the engine or emissions system. The light is triggered by an onboard computer called the Engine Control Unit (ECU). The ECU monitors various sensors and data from the engine and its components. If something is out of the expected range, the light illuminates.
* The problem could be minor or serious. It could be something as simple as a loose gas cap or a more complex issue like a faulty oxygen sensor, a clogged catalytic converter, or a problem with the ignition system.
* You need to address the issue. Driving with the "Check Engine" light on could lead to further damage, decreased fuel efficiency, or even failure to pass emissions testing.
What to do when the "Check Engine" light comes on:
1. Don't ignore it. The light is a warning, not a suggestion.
2. Don't panic. While it could be a serious issue, it's often something minor.
3. Have the code read. A mechanic can use a scan tool to read the diagnostic trouble code (DTC) stored by the ECU. This code provides information about the specific problem.
4. Get it diagnosed and repaired. Once the problem is identified, it can be fixed by a qualified mechanic.
Important Note: If the "Check Engine" light is flashing, it means there is a serious issue that needs immediate attention. Pull over safely and have the car towed to a mechanic.
