1996 Geo Tracker Check Engine Light

[sina27]

after clearing the check engine light and driving for some time, the light came back on only this time I got the p0171 (engine lean) code and not the p0443; 
does this mean my evap VSV is okay? Or can both codes be caused by a bad evap VSV? what about a bad gas cap? 
Womdering if I should order a new evap vsv...