The generator matrix

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

generates a code of length 17 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+50x^12+68x^13+82x^14+356x^15+1047x^16+792x^17+1054x^18+536x^19+54x^20+36x^21+14x^22+4x^23+2x^26

The gray image is a code over GF(2) with n=136, k=12 and d=48.
This code was found by Heurico 1.16 in 0.031 seconds.