code 0443?

i have a 1999 silverado and the s.e.s. light is on. i bought a generic obd2 code scanner tool and it gives code 0443. i looked it up and it is evaporative emmission control module purge valve circuit malfunction. anyone know what that means in lamens terms? how do i fix it?

An ignition voltage is supplied directly to the EVAP canister purge valve. The PCM controls the solenoid by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the controlled component. Each driver has a fault line which the PCM monitors. The voltage of the control circuit should be low (near 0 volts) when the PCM commands a component ON. The voltage potential of the circuit should be high (near the battery voltage) when the PCM commands the control circuit to a component OFF. If the fault detection circuit senses a voltage other than what the PCM expects, the fault line status changes causing the DTC to set.