If the car was very low on gas it might stumble on turns and inclines due to loss of pressure from the remaining gas sloshing away from the pickup line in the tank. In my 95-850 I've gone 40-50 miles in flat terrain at moderate speed with the fuel light on (not by choice) with no stumble, but this would depend on the particular car, the terrain, the speed, temperature, load, etc.

Did you disconnect the air flow meter first then refill the tank? When you refilled the tank did the car run ok again? If so then you probably had no reason to disconnect the airflow meter. Maybe nothing is wrong? Depending on the particular problem, the check engine would usually stay on unless reset by someone, even if everything is ok. If the engine does not now run properly it seems possible this problem is independent of running low on fuel. I'm not aware of a loss of fuel pressure triggering codes - does someone know different?