[nonda Auto DIY Center] P0455 is one of the most common engine error codes, it stands for [Evaporative Emission Control System Leak Detected (Gross Leak)]. Different than P0456 which indicates a small leak, P0456 means that the leak is normally more than 0.04 inches in diameter, and thus, more serious. Check out this self-repair video tutorial created by nonda's expert mechanics. Fix it yourself and save $$$ on your repair fees. Don't forget to claim your FREE ZUS Smart Vehicle Health Monitor he