Cross sections for excitation of the 3914-¿ (0, 0) band of the B2Ju+→X2Jg+ transition of N2+ by proton impact on N2 have been determined in the impact range from 100 eV to 6 keV. Cross sections for excitation of the B2Ju+ (v'=0) state are inferred from these measurements. The cross sections decrease by 2 orders of magnitude in a near-monotonic fashion in this energy range. Comparisons are made with total electron capture.