Check Engine Light Due to Gas Cap Issue on Pontiac Bonneville

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

RepairPal Verified
Average mileage: 129,508 (112,372–189,000)
10 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002, 2003, 2004, 2005
22 people reported this problem
4 people shared problem details
For as long as I can remember the check engine light is on. Replaced the gas cap. Works for about a week. Light back on. I gave up
When I put my gas cap on, I have to turn it past being on. I turn it until it clicks several times. Otherwise, my service engine light comes on.
my check engine light has came on and there is nothing wrong with it
And I have a brand new gas cap from auto zone for my make and model and it's still happening, cleared the computer n all.
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