Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Resources for the Repair and Maintenance of your 2004 Saturn Ion Red Line
2004 Saturn Ion Red Line
2004 Saturn Ion Red Line Problems
Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.
GM recommends replacing the engine coolant at 100,000 miles; however, our technicians tell us that the coolant may become contaminated and require a complete cooling system flush every 60,000 to 70,000 miles.
2004 Saturn Ion Red Line Questions and Answers
my car is a 2004 saturn ion redline supercharged
2004 Saturn Ion Red Line Reviews
Overall A GREAT car, although I am experiencing transmission difficulties right now and am having trouble locating a new tranny to replace my broken one. But other than that a great car, good steering and brakes and i love the 'suicide' doors. lol