Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Average mileage: 180,750 (149,000–218,000)
15 people reported this problem
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Check engine light came on, required only a gas cap replacement.
This isn't unusual for a car that's 12 years old. I just had to replace my Saturn's gas cap because after 12 years, its seal had become worn out and caused the check-engine light to come on.