And then the ECM is missing or destroyed.
Spoiler: an OBD2 scanner is not going to tell you the exact problem, also, and with ZERO mechanics skill those parameters are going to tell you nothing.
You look at the scanner and see no errors. But your air filter is three years old and crunchy as a dorito. The scanner won’t help you here.
Usually when troubleshooting the issue, the car scanner is a nice thing to start with, but it is not supposed to tell you what to do, even if the exact error is diagnosed. And with mechanics zero you don’t even know what an air filter is, so… good luck with fixing your black sedan, friendly stranger.
P.S.: just not to be unsubstantiated, here’s an error from a manual I have.
DTC P0301, NO. 1 CYLINDER MISFIRE
Possible cause:
Improper spark plug
Insufficient compression
Incorrect fuel pressure
The injector circuit is open or shorted
Fuel injectors
Intake air leak
The ignition signal circuit is open or shorted
Lack of fuel
Drive plate or flywheel
Heated oxygen sensor 1
Incorrect PCV hose connection
That’s the real thing you’re going to see on your scanner screen, not the “Change the car’s spark plug in cylinder one, dear mister”.
Unless you have high mechanics level, and are familiar with vehicle mechanics, these are not going to help you.
Thing is, even a futuristic vehicle is not going to tell you what to do, because you are not supposed to do anything besides taking you car to the dealer’s for troubleshooting.
The logics of the manufacturing companies is simple: the user sees the warning light (check engine) or the sing on the display and takes the car to the service depot.
There simply is no need to tell the driver exactly what’s wrong, because 90% of the world drivers are not going to repair their cars with their own hands, therefore telling a housewife that her fuel pump has failed is completely pointless.