To find out *what* problem triggered the light, you need to use one of these methods:
* OBD-II Scanner/Code Reader: This is the most reliable method. You can buy a relatively inexpensive OBD-II scanner at most auto parts stores. Plug it into the OBD-II port (usually located under the dashboard, often near the steering column) and it will read the diagnostic trouble codes (DTCs). These codes correspond to specific problems. You can then look up the code's meaning online or in a repair manual to understand the issue.
* Dealership or Repair Shop: A mechanic can use a professional-grade scanner to read the codes and diagnose the problem. This is the most expensive option but offers the most comprehensive diagnosis and potential repair.
* Some Advanced Onboard Computers (Less Reliable): Some newer vehicles might display a description of the problem directly on the instrument panel, but this is not guaranteed and often only provides a general indication.
Important Note: Simply clearing the code with a scanner without fixing the underlying problem will only temporarily turn off the light. The light will likely return until the problem is addressed.
