Here's the proper procedure:
1. Diagnose the problem: Take your Mazda Millenia to an auto parts store like AutoZone, Advance Auto Parts, or O'Reilly Auto Parts. They'll usually scan your car's OBD-II system for free and tell you what the trouble code(s) are. This code will give you a clue as to what's causing the light.
2. Fix the problem: Once you know the trouble code, you can research the problem online or consult a repair manual. You might be able to fix it yourself (if you're mechanically inclined), or you'll need to take it to a mechanic.
3. Clear the code (after fixing the problem): *Only after repairing the issue* can you clear the code. There are a few ways to do this:
* OBD-II Scanner: The same scanner used to read the trouble codes can usually clear them as well. This is the most reliable method.
* Disconnecting the Battery: This is a less reliable method. Disconnect the negative (-) terminal of your car battery for about 15-20 minutes. This will often reset the computer, but it doesn't guarantee the CEL won't come back on if the problem persists. *Note*: This might clear other stored settings in the car's computer, like radio presets.
Important Considerations:
* Don't just reset the light: Simply resetting the CEL without fixing the problem will only temporarily turn off the light. The underlying issue will likely cause further damage or even lead to a breakdown.
* Get a professional diagnosis if you're unsure: If you're not comfortable diagnosing and fixing car problems yourself, take your Mazda to a qualified mechanic.
In short, focusing on fixing the *cause* of the service engine light is crucial, not just turning the light off. Ignoring it can lead to more expensive repairs down the road.
