Isuzu Rodeo OBDII code P0440: EVAP purge valve solenoid?

guesser

New Member
My Rodeo 96 has a P0440 code (Evaporative Emissions Control System problem). I have visually inspected the hoses on the engine; double-checked the gas cap is tight; but have not looked at the fuel tank sensors and connections. I've noticed that the EVAP canister purge valve solenoid is "switching" non-stop ("click-click-click" noise without stopping). Is it the expected behavior?
 
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