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There are multiple safety, environmental, and motor vehicle inspection problems which can result from neglecting a vehicle's evaporative system. These are the leaking of fuel and its vapor, and failing emissions inspections.
Trouble code P1456 means: Evaporative emissions control system leakage (fuel tank system)
usually this means the gas cap is not on tight or is leaking
Trouble code P0445 means: Evaporative Emission System Purge Control Valve Circuit Shorted
can u reroute serp. belt to bypass a\c compressor
evaporative emission control system incorrect puge flow
The evaporative emissions control system reduces pollution by storing and recovering the evaporation products (fumes) from the gas tank. This is why modern gas caps are designed to not leak. The fumes are fed into the engine to be burned. There is a check made by the computer to verify that there is no leak, and a trouble code will be set if there is one. This is why is is essential to make sure the gas cap is tight after refueling.
buy a new one
No, that code is for the evaporative emissions control system in the fuel tank. It has nothing to do with the catalytic converter.
The primary function of the evaporative emissions system (EVAP system) is to regulate the engine and fuel tank vapors. It keeps the vapors from being released into the air by collecting them in an activated charcoal storage tank.
P0441 - Evaporative Emissions System "Leak Detection Pump" or "Powertrain Control Module" replace whatever is under warranty first.
Both of these codes indicate a leak in the evaporative emissions control system. The most common cause of this code is a bad fuel gas cap.