DTC P0443: Evaporative Emission Purge Solenoid Control Circuit: Description

Ignition voltage is supplied directly to Evaporative Emission (EVAP) purge solenoid. The EVAP purge solenoid is Pulse Width Modulated (PWM). Powertrain Control Module (PCM) controls EVAP purge solenoid on time by grounding control circuit via an internal switch called a driver. Scan tool displays amount of on time as a percentage. PCM monitors status of the driver.