What is the meaning of OBD-II code P0455, and what are the possible causes and solutions for this code to be

OBD-II code P0455 refers to a large leak in the Evaporative Emission Control System (EVAP). The EVAP system is responsible for preventing fuel vapor from escaping into the atmosphere, and it is composed of several components, including the fuel tank, fuel filler cap, fuel vapor hoses, and charcoal canister. Possible causes for a P0455 code include the following: -A loose or missing fuel filler cap -A leak in the fuel tank, fuel filler neck, or one of the vapor hoses -A malfunctioning or clogged EVAP canister purge valve -A malfunctioning or clogged EVAP canister vent valve -A problem with the EVAP system's pressure sensor -A problem with the EVAP system's vacuum switch To diagnose the problem, a mechanic will typically use a scan tool to retrieve the stored diagnostic trouble codes and perform a visual inspection of the vehicle's EVAP system, including all hoses, connections, and valves. They may also perform a smoke test to identify the source of the leak. The solution will depend on the cause of the code. It can involve tightening or replacing the fuel filler cap, replacing a leaking fuel tank, repairing or replacing damaged hoses, replacing a malfunctioning valve or sensor, or performing other repairs as necessary.