To properly address the light, you need to determine *why* it's on. There are two main approaches:
1. OBD-II Scanner: This is the best method. An OBD-II scanner (available relatively inexpensively at auto parts stores) will read the Diagnostic Trouble Codes (DTCs) stored by the car's computer. These codes pinpoint the specific problem causing the light. Once you know the code(s), you can research the issue online or consult a repair manual. After fixing the problem, you then need to clear the codes with the scanner. Simply clearing the codes without fixing the underlying issue will just make the light come back on.
2. Professional Mechanic: A mechanic has the tools and expertise to diagnose and fix the problem efficiently. This is the best option if you're not comfortable working on your car yourself.
Important Note: Simply disconnecting the battery for a short period *might* temporarily turn off the SES light, but it will not fix the underlying problem. The light will almost certainly reappear, and the problem could worsen. This is not a solution, it's a temporary masking of the issue.
In summary, don't just reset the light. Diagnose the problem first to ensure the health and longevity of your vehicle.
