Check Engine Light "ON"

Used Scan Tool and DTC P0449 appeared on the screen Twice Evap Emissions Circuit Intermittent.
Checked the connector and wiring, no loose connector or any damage to the wiring.

 

Where would I look for a wiring diagram on the Evap Emissions Vent Solenoid Intermittent circuit P0449. Also should I replace the soleniod or the fuse for the circuit?

 

Welcome to the forum. I had assumed you were working from a diagram. See my responses in thread https://chevroletforum.com/forum/impala-14/p0449-43122/. The wire color may be different, depending on what year and model vehicle, but they're all implemented about the same.