I don't see the point in having a scanner unless you have the ability to interpret the fault code, and then fix it.

In this case, as the poster above notes, the gas cap was probably loose. If the same fault comes back after your warranty expires, you have a work order reference to a pre-existing condition, so it should be handled by BMW. That assumes that there may be a leak in the evaporative emission control system, as opposed to the gas cap simply being loose.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue