Here's the proper procedure:
1. Diagnose the Problem: Before doing anything, you need to find out *why* the SES light is on. The most reliable way to do this is with an OBD-II scanner. These are relatively inexpensive and readily available at auto parts stores. The scanner will read the diagnostic trouble codes (DTCs) stored in your car's computer. These codes will give you clues about the problem.
2. Address the Problem: Once you know the DTC(s), you can research the likely cause (online forums, repair manuals, etc.) and either fix it yourself or take it to a mechanic. Ignoring the problem won't make the light go away and could lead to more significant issues.
3. Clear the Codes (After Repair): *Only after* you've addressed the issue that triggered the SES light, you can clear the codes. You can typically do this with your OBD-II scanner. The scanner will have an option to clear codes.
Methods to Clear Codes (using an OBD-II scanner):
* Most OBD-II Scanners: These usually have a menu option to clear codes. The process is generally straightforward and guided on the scanner's screen.
* Some Advanced Scanners: May offer more sophisticated options for clearing codes or resetting adaptive memory.
WARNING: Do NOT attempt to disconnect the battery to reset the light. While this might temporarily turn off the light, it won't address the underlying problem and the light will likely come back on. Furthermore, disconnecting the battery can erase other important settings in your car's computer.
In short: Don't just reset the light. Fix the problem that caused it first. Using an OBD-II scanner is the responsible and effective way to deal with a "Service Engine Soon" light.
