Service Engine Light or Check Engine Light?
If it is a Service Engine Light, then you are do for maintenance, like an oil change. Check the owner’s manual about it.
If it is a Check Engine light (CEL) then have the codes read and post back with the actual error code like [P1234] Note: CELL’s DO NOT tell you to replace this or that part. At most it is tilling you that it is getting an unexpected message from that part.