Here's the proper procedure:
1. Diagnose the problem: The most crucial step. You need to find out *why* the light is on. This can be done in a few ways:
* OBD-II Scanner: This is the best method. An OBD-II scanner (available relatively cheaply at auto parts stores) will read the diagnostic trouble codes (DTCs) stored by your vehicle's computer. These codes provide clues about the specific issue causing the light. You can then research the codes online or in a repair manual to understand the problem.
* Professional Mechanic: A mechanic has the tools and expertise to quickly diagnose and repair the problem. This is often the most efficient and reliable method, though it will cost more.
2. Repair the Problem: Once you know the cause, you need to fix it. This might involve replacing a sensor, fixing a leak, or performing more extensive repairs.
3. Clear the Code (After Repair): *Only after* successfully repairing the issue, you can clear the code. This can often be done with the same OBD-II scanner you used for diagnosis. The scanner usually has an option to clear codes. Some auto parts stores will clear codes for free if you bought a part from them.
Important Considerations:
* Simply clearing the code without fixing the problem will only temporarily turn off the light. The light will likely come back on, and the underlying issue will remain.
* Disconnecting the battery's negative terminal for a short period might clear the code, but this is not a reliable method and may not work on all vehicles. It's also not recommended as it can disrupt other vehicle systems. Use an OBD-II scanner instead.
In short: Don't just reset the light; fix the problem that's causing it. This is essential for your vehicle's safety and reliability.
