DTC P0444: EVAP Emission Control System Purge Control Solenoid Valve (PCSV) Circuit Open: Description

Fig 1: PCSV Location & Flow Vs. Differential Pressure Graph

Courtesy of HYUNDAI MOTOR CO.

The evaporative emissions 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 ECM controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the engine for combustion. This valve is actuated by the purge control signal from the ECM and controls fuel vapor from the canister to the intake manifold.