The generator matrix

 1  0  1  1  1 X^2+X  1  1 X^2+2  1  1  1  1 X^2  X
 0  1 X+1 X^2+X X^2+3  1 X^2+2 X^2+X+1  1 X+2  2  1 X+1  2 X^2+X
 0  0 X^2  0 X^2+2  2  2 X^2+2  2  2 X^2 X^2+2  0 X^2  2
 0  0  0  2  2  2  0  0  0  2  2  0  2  0  0

generates a code of length 15 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+102x^12+208x^13+482x^14+464x^15+460x^16+272x^17+36x^18+16x^19+4x^20+2x^22+1x^24

The gray image is a code over GF(2) with n=120, k=11 and d=48.
This code was found by Heurico 1.16 in 0.016 seconds.