How much would it cost to fix codes po301,po422,po322,po116

SOURCE: how to fix check engine from showing po422 code

The PO442 code is for a "small" leak in the EVAP system. A good starting point is to make sure your gas cap is on tight. When you install it always turn it till you hear and feel the cap click. You should also look at the top of filler neck where the cap tightens down to if its rusted or cracked this will set the code. Check the sealing rig on the gas cap also make sure its not cracked or split. If nothing is obvious there you will want to look at the vacuum lines around the gas tank you will be looking for loose lines or cracks in them. Good luck these leaks are sometimes hard to fine with all the spacial equipment they tell us it takes.

Testimonial: "THANKS SO MUCH FOR YOUR HELPFUL INFO. I WAS AT WITS END AND DIDN'T KNOW WHAT ELSE TO DO. I APPRECIATE THIS VERY MUCH!!"