Verified answer

It can mean a variety of things ranging from a malfunctioning fuel pump, fuel cap off, or more serious it's hard to be specific because it's just one light.

Like that other guy said, take your car to autozone. There they will do this test that is almost always free where they plug this little device into your car to read the error code, which will give them and you more info on the actual problem.

From there, depending on the severity of the problem, you can either tell them to turn off the light (if you have fixed the problem yourself, like the open/broken fuel cap problem), or take your car to a repair shop/dealer and tell them of your findings.

2

means you need to take the car to a qualified repair shop, the computer has sensed a problem in the cars electronic engine management system.

It means you need to go to auto zone for their free "professional diagnostics".