Check Engine Light Due to Gas Cap Issue on Cadillac Seville STS

Problem Description and Possible Solution

A Loose or worn gas cap may cause Check Engine Light to illuminate.

Problem Data
RepairPal Verified
Average mileage: 121,680 (42,000–233,000)
8 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002, 2003
14 people reported this problem