The generator matrix

 1  1  1  1  1  1  1  1  2  2  0  2  0  2  1  1  8  1
 0  2  0  2  0  0  6 14 10 14  4  4  2 14  8  0  0 10
 0  0  2  2  0 14  6  0  6  4  2  2  0  6  2  4  2  4
 0  0  0  4 12  4  0  4  0  8 12  0  0 12  8  4 12  4
 0  0  0  0  8  0  0  0  0  0  0  8  8  8  0  0  8  8
 0  0  0  0  0  8  0  0  8  8  8  0  8  8  0  0  8  8
 0  0  0  0  0  0  8  0  8  8  8  8  8  0  8  8  0  0

generates a code of length 18 over Z16 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+67x^12+270x^13+473x^14+1700x^15+3271x^16+6162x^17+8748x^18+6296x^19+3284x^20+1746x^21+494x^22+196x^23+32x^24+14x^25+12x^26+1x^28+1x^30

The gray image is a code over GF(2) with n=144, k=15 and d=48.
This code was found by Heurico 1.16 in 2.35 seconds.