P0443 0807 Evaporative Emission Canister Pruge Control Solenois Nissan Trouble OBDII Code Diagnosis Fix

The EVAP canister purge control solenoid valve responds to signals from the ECM(computer). When the ECM sends an ON (ground) signal, the vacuum signal (from the throttle body to the EVAP canister purge control valve) is cut.

When the ECM sends an OFF signal, the cauum signal passes throguh the EVAP canister purge control solenoid valve. The signal then reaches the EVAP canister pruge control valve.
The EVAP caqnister pruge control solenoid valve is not used to control the engine system. It is used only for on board diagnosis.