FA20 ENGINE CONTROL: SFI SYSTEM: EVAP System; 2013 MY FR-S [03/2012 - ]
Don't need techstream.
Get a hand vacuum pump, a tee fitting, and some hose. Hook it inline where the manual instructs to feel for vacuum on the valve test.
Clear the code and fire up the engine.
Compare measured with specs.
Is it a leak, or a dead solenoid?
Profit.