a loose fuel cap changes the pressures in the fuel system making the computer think there is a problem on older cars it set off the check engine light and a computer check was necessary..a common problem was just a loose fuel cap causing a false alarm
It might cause the "check engine" light to come on.
check lugnutpatterns.com
check out lugnutpatterns.com
94 grand ams are fuel injected, not carburated. There is no carburetor to check
after the cause of the code is repaired, you reset with a scan tool, or by unhooking the battery.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Check the fuse. It says [guages]
sealed system or not
check under the dash by the sterring wheel
the steering wheel..
Check the catalytic converter.
A malfunctioning coil pack can cause your 2001 Pontiac Grand Am to backfire. The more likely cause is a faulty fuel injector.