DTC P0443: EVAP Purge Solenoid Control Circuit: Description

An ignition voltage is supplied directly to Evaporative (EVAP) emission purge valve. EVAP purge valve is Pulse Width Modulated (PWM). Powertrain Control Module (PCM) controls EVAP purge valve 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 driver. DTC sets when control module detects an incorrect voltage for commanded state of driver.