Question about 2008 Pontiac G6 Sedan

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I have a pontiac g6 that i just bought its a 2007 and it told me earlier to check my gas cap which i did then my check engine light came on and wont come off we went to auto zone and the machine said that it had a large evap leak but i dont know how to fix it or what a large evap leake is please help!!

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An Evap leak in a car is usually fuel fumes leaking from the evap system. The purpose of the system is to expel pressure built in the gas tank, collect the fumes, and then at the right moment, purge the fumes into the intake to be burned. On newer cars, a leak in the system will set off the check engine light. The leak doesn't have to be big... in fact, it can be tiny. As in, can't see with the naked eye, tiny. A smoke machine is usually used to find the leak. A popular cause of an evap code is a loose gas cap, as the gas tank and filler neck itself are part of the system.

Posted on Aug 26, 2010

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