Service Engine Soon Light remains on

Tiny
TAMMY DINIERI
  • MEMBER
  • 2002 BUICK CENTURY
  • 69,000 MILES
The first time light came on, I figured out the problem by reading the owners manuel, which was I have to use Medium Grade Gasoline or higher. Now the light is back on and the car is running fine. What can be causing the light staying on, all of a sudden?
Wednesday, July 10th, 2013 AT 5:00 AM

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