Here's the proper approach:
1. Diagnose the Problem: The most important step. You need to determine *why* the SES light is on. This can be done in a few ways:
* OBD-II Scanner: The best approach. Buy or borrow a relatively inexpensive OBD-II scanner (available at most auto parts stores). Plug it into the OBD-II port (usually under the dashboard) and it will read the diagnostic trouble codes (DTCs). These codes will give you clues about what's wrong. Search online for the specific code(s) to learn more.
* Auto Parts Store Scan: Many auto parts stores will scan your car's codes for free. They can then tell you what the codes mean and often suggest possible fixes or parts.
* Mechanic: If you're uncomfortable diagnosing the problem yourself, take your Eldorado to a qualified mechanic. They have the tools and expertise to accurately diagnose and repair the issue.
2. Repair the Problem: Once you know the DTCs and the likely cause, fix the problem. This might involve replacing a sensor, fixing a leak, or performing more extensive repairs.
3. Clear the Code (After Repair): *Only after you've addressed the underlying problem* should you clear the SES light. There are a few ways to do this:
* OBD-II Scanner: Most scanners have a function to clear diagnostic trouble codes. Follow the instructions for your specific scanner.
* Disconnect the Battery: Disconnect the negative (-) terminal of your car battery for about 10-15 minutes. This will often reset the computer, but it's not guaranteed to work for all codes and may reset other settings in your car, such as radio presets.
Important Note: Simply disconnecting the battery or using a generic code clearer *without* fixing the underlying issue is a temporary fix at best. The SES light will almost certainly return, and the underlying problem could worsen, leading to more significant damage or even safety hazards. Always diagnose and repair the cause of the light before clearing the code.
