DTC P0443: Evaporative Purge Solenoid Control Circuit: Description

An ignition voltage is supplied directly to the Evaporative Emission (EVAP) purge solenoid. The EVAP purge solenoid is Pulse Width Modulated (PWM). The PCM controls the EVAP purge solenoid ON time by grounding the control circuit via an internal switch called a driver. The scan tool displays amount of ON time as a percentage. The PCM monitors the status of the driver. If PCM detects an incorrect voltage for the commanded state of the driver, DTC sets.