What does it mean service engine soon light comes on for Nissan Sentra 2011?

When the "Service Engine Soon" light comes on in a 2011 Nissan Sentra, it indicates that the vehicle's onboard diagnostic system has detected an issue that requires attention. This could range from minor problems, like a loose gas cap, to more significant issues with the engine or emissions system. It's advisable to have the vehicle checked by a mechanic or use an OBD-II scanner to retrieve the error codes for proper diagnosis and resolution. Ignoring the light could lead to more severe damage or reduced fuel efficiency.