My check engine light came on in May I took it to Auto Zone and they checked it for free and told me it was the gas cap. Well, I tightened the gas cap and reset the check engine light by unhooking the battery cables. It was fine until July. Then when I took it to have it inspected they did a diagnostic test on it and said it was the code P0442 a leak. So, now I'm stumped and confused. I'm a 39yr old woman trying to survive with two kids. I can't afford to have it worked on, I can barely make the payments...So, I wondering is the anyone out there that can take me step by step through the process of trying to solve this on my own? I'm desperate!