The problem could range from something minor, like a loose gas cap, to something more serious, like a malfunctioning catalytic converter or sensor. Ignoring it could lead to further damage and potentially expensive repairs.
To find out the specific problem, you need to:
* Get the diagnostic trouble code (DTC): You can do this yourself with an OBD-II scanner (available relatively cheaply at auto parts stores), or have a mechanic do it. The scanner will read the code(s) stored by the car's computer.
* Look up the code: Once you have the code(s), you can look them up online (many free resources are available) or in a repair manual to get a description of the potential problem.
* Address the problem: Based on the code and its description, you can decide whether to attempt a repair yourself (if you're mechanically inclined) or take it to a mechanic.
Don't just reset the light without addressing the underlying issue. Resetting it will only temporarily turn off the light, and the problem will likely persist and potentially worsen.
