The problem could range from something minor, like a loose gas cap, to something more serious, such as a failing sensor or a malfunctioning component.
To find out what's causing the light:
* Get the Diagnostic Trouble Codes (DTCs): You'll need to have the codes read by a mechanic, an auto parts store (many offer free code reading), or with an OBD-II scanner that you can buy. The DTCs will give a much clearer indication of the problem.
* Don't ignore it: While it might be a minor issue, driving with the light on can lead to further damage and potentially more expensive repairs down the line.
Ignoring the SES light could lead to reduced fuel economy, increased emissions, and even damage to the catalytic converter or other engine components. Get it checked out as soon as possible.
