Here's what you *should* do:
1. Get the diagnostic trouble code (DTC): You have several options:
* OBD-II Scanner: The most reliable method. Purchase a relatively inexpensive OBD-II scanner (available at most auto parts stores) that reads and clears codes. This will give you a specific code that you can look up online to understand the problem. Many scanners also provide some level of diagnostic help.
* Auto Parts Store: Most auto parts stores will scan your car's computer for free. They can tell you the code and often suggest possible solutions.
2. Address the Problem: Once you know the DTC, research the likely cause. This could range from a loose gas cap to a more serious issue requiring professional repair. Attempting repairs yourself depends on your mechanical aptitude and the nature of the problem.
3. Clear the Code (After Repair): *Only after you've addressed the underlying issue and believe the problem is fixed* should you clear the code. Many OBD-II scanners have a "clear codes" function. Some advanced scanners will even let you monitor live data to confirm the repair was successful. If you've cleared the code and the light comes back on, the problem wasn't fixed.
Important Note: Simply disconnecting the battery for a short period might temporarily clear the light, but the code will likely return and the underlying problem will remain. This is not a proper solution. You need to diagnose and fix the issue before clearing the light.
