So, this code comes on when there is high resistance in the circuit, I would remove the connectors from the valve and the PCM to inspect the terminals for corrosion. Also here are the wiring diagrams for the EVAP system and a guide to help you do the tests.
Also, even though the valve tested good I would replace it anyway if you can't find a connection problem. Check out the images (below). Please let us know what you find. We are interested to see what it is.
Images (Click to make bigger)
Friday, September 9th, 2022 AT 12:06 PM