DTC P0443: Evaporative Emission System Purge Control Valve Circuit

P0443 - EVAPORATIVE EMISSION SYSTEM PURGE CONTROL VALVE CIRCUIT

Description: The PCM monitors the state of the EVAPCP circuit output driver. This DTC sets when the signal moves outside the minimum or maximum limit for the commanded state.
Possible Causes: VPWR circuit open EVAPCP circuit open EVAPCP circuit short to ground EVAPCP circuit short to voltage Damaged EVAP purge valve Damaged PCM
Diagnostic Aids: To verify normal function, monitor the EVMV PID or EVAPCP PID and the signal voltage (PCM control side). With the valve closed, the EVMV indicates 0 mA (0% duty cycle for EVAPCP) and voltage approximately equal to battery voltage. When the valve is commanded fully open, EVMV indicates 1, 000 mA (100% duty cycle for EVAPCP) and a voltage drop of 3 volts minimum is normal.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST HX .