I'm not sure the capabilities of your scanner, but most can show a readiness state. Many faults require the vehicle to go through a drive cycle after the code is cleared to be 'ready'. After completing the drive cycle, the car's computer will either show 'ready', or turn on the SES light again.

On my Innova scanner, it has three lights just below the screen; red (current fault), yellow,(waiting to complete drive cycle), and green. In many states, you can not pass emissions inspections until the car is ready.

Also, there are techniques for accelerating the drive cycle.

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2014 BMW 328i Xdrive
2011 BMW 335i M-Sport
2008 BMW X5 4.8i Sport
2000 BMW 528i 5sp