The generator matrix

 1  1  1  1  1  1  1  1  1  1  X  1  1  1  1
 0 X^3  0  0  0  0  0 X^3  0 X^3 X^3  0  0 X^3 X^3
 0  0 X^3  0  0  0 X^3 X^3  0 X^3  0  0 X^3 X^3  0
 0  0  0 X^3  0  0 X^3  0  0 X^3 X^3 X^3 X^3  0  0
 0  0  0  0 X^3  0 X^3  0 X^3 X^3  0 X^3  0 X^3  0
 0  0  0  0  0 X^3 X^3  0 X^3  0 X^3  0  0 X^3 X^3

generates a code of length 15 over Z2[X]/(X^4) who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+27x^12+32x^14+384x^15+55x^16+12x^20+1x^28

The gray image is a linear code over GF(2) with n=120, k=9 and d=48.
This code was found by Heurico 1.16 in 3.62e-008 seconds.