Cadillac Seville Problem Report
Cadillac Seville Check Engine Light Due to Gas Cap Issue
Illumination of the Check Engine Light may be the result of a loose or worn gas cap.
Fiddled with gas cap and, probably will replace. - Visitor
An intake manifold vacuum leak can develop from a variety of sources, often causing illuminatio...
I have a 1990 cadillac seville. It has been missfiring on me and it backfires and looses power...
The EGR control solenoid or EGR valve may fail causing the Check Engine Light to illuminate.
The EGR valve may stick open, causing a rough idle and/or the Check Engine Light to illuminate.
The "check engine" light comes on and sometimes goes off. Lately it has been staying on. The...