While you are still checking this thread.
Wanted to pass along a "They said - He Said" moment dealing with EVAP stuff.
The canister is located, in near the bottom well of the Spare tire - if anyone had taken a floor jack to lift up the back of the vehicle, or if you ran over a piece of metal or debris and heard it hit the bottom of your car, the EVAP canister is also under there. It's not guarded - so it can get whacked when you roll over something when you don't not quite have the ground clearance, it can crack that unit.
The other problem lies in fuel vapor pressure and when you have a fuel that is getting too close to warm - boiling temperatures - Gas has a volatility as well as a low boiling point - can cause stalling from the tank pressure building faster than it can safely vent.
Ran into those problems on other vehicles I've owned and warranty doesn't cover due to road hazards or poor fuel grades found at some cheap unbranded gas stations.
Ford's Evap System: Operation & Testing | MOTOR
https://www.motor.com/magazine-summary/fords-evap-system-operation-testing/
But there is an article dealing with Fiestas and their Gas tanks and fuel pressure issues - it's at the bottom of the article, but the reason I even mention this is because of the FUEL PRESSURE Valve that is mentioned, is the SAME as those mentioned in the earlier articles and is even in my vehicle - a 2018 Fiesta SE 1.6L NA.
Yours may be similar...
IF the Valve seems ok, you'll have to check the line to the back and see if it get's kinked or crushed, and or cut - losing ability to maintain vacuum pressure to even provide the ability to perform on-board EVAP testing.
Adding more....
Wanted to show you ANOTHER valve that also pulls from that Gas tank - it actually is used by the ECM during Warm up.
This valve head to the Manifold, but uses a special type of twist on connector.
It's red in color.
IF that hose that runs to the Manifold is off, your Idle will be VERY rough even while warmed up.
That control valve is a lot like a "choke" on carbureted systems. It uses a pinhole valve diaphragm that uses a metered pulse length of time from the ECM to control the Idle Mixture while the engine starts and stabilizes - this valve "clicks" at a given rate until the engine can run lean enough without it and then operates in unison with the EVAP system as a bypass while the EVAP purge works, then closes off, it can also be used in high vacuum moments (shifts and similar actions) during deceleration to help with pressures and mixtures.
The only reason I'm mentioning it, is if you have a vacuum leak, this may be the area that causes the condition.,
