You really need to find out what code is causing the light to come on. Visit your local auto parts store. Most of them will read it for you in hopes of selling you the part necessary to fix the problem.
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reset service engine light
How do I reset the service engine light on a 2003 Chevy Trailblazer?
reset service engine light on BMW 325
On a 2003 Lincoln Navigator : The check engine light / service engine soon light is a drawing of an engine located directly under the center of the tachometer
Service required is the oil change reminder. Service engine soon would be the check engine light.
The head lights have nothing to do with the check engine light.
fill the coolant reserve and the light should go out
get the engine serviced.
When service engine light is on on a 2003 Chevy Trailblazer, the problem could be a faulty thermostat, a circuit range performance problem, or any other problem.
Because your vehicle needs a certain service. That service will be listed in your owner's manual.