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?
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2005 Pontiac Bonneville Question: The check engine light comes on, it might be the fuel cap not sealing tight.
Answer #1Chevy Power August 16, 2012, 06:24Journeyman
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 #2Greg's Orange Auto (13656 Answers) , Orange, CA - (714) 361-9386globalhelper August 16, 2012, 06:26Master
could be several issues but if there is a seal issue with cap that needs to addressed 1st