A scan tool check of the canister purge valve control solenoid shows that it's always open. Which of the following could be the cause?

The correct answer to the following question will be "Defective ECM (Engine Control Module) ".

Explanation:

In the given question. the options are not given. So that the complete question will be:

A. Vacuum source problem

B. Vacuum passage restriction

C. Broken purge valve vacuum diaphragm

D. Defective ECM (Engine Control Module)

Now,

A faulty or defective ECM (Engine Control Module) will force the control valve capacitor to be somehow accessible.

A is incorrect because although the valve isn't vacuum operated. B is incorrect because although the valve control is indeed not vacuum operated. C is incorrect since the diaphragm was never used in the solenoid valve command rinse.

So that the above is the right answer.