The error codes are bogus about 40% of the time, we can diagnosis the old fashion way if you like.
Repeat this test 3 or 4 times until you get familiar with what the furnace is doing at each stage.
LISTEN TO FURNACE START UP
Next stand next to the furnace after the thermostat has been turned off for 5 minutes. Listen intently as someone else turns the thermostat to heat and sets it for 85F.
You should hear the small inducer fan start right away.. then a faint click after 1to 3 seconds, that is the pressure switch closing.
....then in15 to 45 seconds you should hear2 more faint clicks, that is the ignition relay and gas valve relay closing.
....then within 5seconds you should hear the main burner fire..
In about 30seconds the main blower should come on.
If the main burner goes off after 2 to 5 seconds or within a minute or so tell me about it and the number of seconds involved.
Repeat that a few times until you get familiar with the sounds, then tell me in detail how far the sequence goes before it stops.
It is also a good idea to replug all of the connections in the unit, that burnishes any oxidized terminal connections and will sometimes solve the problem,especially at the printed circuit card and in any sensor molex connectors. Do that with the power off to theunit of course.
We can go from there.