2005 Pontiac Bonneville Q&A

2005 Pontiac Bonneville Question: The check engine light comes on, it might be the fuel cap not sealing tight.

I was told that rust where the gas cap screws on will cause a sensor to trip and turn the check engine light on. Will sanding the rust help by making better contacy? -
Answer 1
You can try cleaning off the rust and replacing the cap. But be very careful not to allow any debris to fall into tank when cleaning the rust. -
Answer 2
could be several issues but if there is a seal issue with cap that needs to addressed 1st -