DTC P0441 EVAP. Emission System Incorrect Purge Flow: General Description

The evaporative emission control system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The evaporative canister is designed to trap and store fuel vapor emissions from the fuel tank.

When the carbon in the canister is unsaturated, fuel vapor passing over and through the activated carbon surface is absorbed and fresh air can pass out through the vent system with very little residual fuel vapor. When fresh air is drawn through the canister from the vent system, fuel vapors recombine with the air and are metered into the engine.