Because sensors in the car's computer system are getting signals that there is, or are, components that require professional care.
why service engine soon light on 1999 mustang
Yes, the Service Engine Soon light is the same as the Check Engine light.
Yes.
The vehicle is due a service soon
Yes.
reset service engine light on BMW 325
The service engine soon is the same as a check engine light. It has nothing to do with an oil change.
why appear light ( service engine soon), after change oil on a 2001 ford pickup (f150)?
service engine soon 1992 eldorado
The service engine soon, or check engine, light is reset with a scan tool after repairing the cause of the trouble codes.
How do I reset the service engine light on a 2003 Chevy Trailblazer?
Maybe you should service the engine soon. :P