What does the Service Engine Soon Light mean?

The Service Engine Soon (SES) light is a warning light that indicates there is a problem with the vehicle's emission control system. The light will come on when the vehicle's computer detects a problem with the emission control system. If the light comes on, it means that the vehicle is not meeting the emission standards set by the government. A few things can cause the SES light to come on, such as a faulty oxygen sensor, a dirty air filter, or a problem with the catalytic converter. If the light comes on, it is important to have the vehicle checked by a mechanic as soon as possible to diagnose and fix the problem.