This code is to the Evaporation system to my car. And it has a large leak.
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2005 Chevrolet Cobalt
Question: My car has this engine code, "p0455" problem.I want to know how i can fix?
Answer #1chinasinoy May 02, 2012, 23:36Journeyman
P0455 means a gross leak detected in the Evaporative Emissions System. Some call this a "gas cap" code, because the most common cause a loose or failed gas cap. But it could be caused by any vapor leak in the fuel tank, filler neck, or anywhere else in the vapor management system. If it isn't a gas cap, you will need tol take it someplace where they have a smoke machine that can find the leak using smoke.