Check Engine Light Due to Gas Cap Issue on Saturn L300

Problem Description and Possible Solution

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Problem Data
RepairPal Verified
Average mileage: 110,000 (14,500–169,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
25 people reported this problem
Viewing 1 - 7 of 7 comments
The check engine light came on and the repair shop replaced the gas cap. The light came on again and they checked the system with smoke. No leaks were found in the system but the light did not come back on.
The light now comes on and goes off intermittently.
engine light comes and goes due to gas cap. replacing th cap resolved the issue for a few weeks then it reappeared.
everytime i put gas in my car approx 1/2 hr later my ck eng light comes on and my saturn dealer can't find the problem
Had the same problem and lived with it for 3 years; finally check engine light didn't turn off with new gas cap and needed to replace catalytic converter. Unrelated, have put in two water pumps one at 90M miles and this one at 148M miles. Still love my car and parts do fail. This has been a very reliable auto. Now I've learned I should have had my brake fluid flushed with the brake jobs...that's next on the maintenance schedule.