1989 Buick Skylark mileage: 75,000. The check engine light comes on frequently but with no certain pattern. We asked our technician about this indicating there was no change in "functionality" of the car when the light comes on and he said not to worry about it. I have also been told this is a common trait with this vehicle. What is your professional opinion?
The check engine light will light when there is a malfunction in the engine management system. The fault code is then stored in the computer. The computer must be scanned to retrieve these stored faults to pinpoint the malfunctioning component. Because the check engine light indicates something is wrong, a trip to you neighborhood automobile service center sooner rather than later is recommended.