The generator matrix

 1  0  0  0  1  1  1  4  1  2  1  0  1  1  1 14  1  1 12  1  1
 0  1  0  0  2  9  5  1  4  0  9  1 12  7 10  0  2  8  1  7  8
 0  0  1  0  3  1  6  7  3  1  1  5  6  4 11  1  9  5 11  6  0
 0  0  0  1  1  4  3  3  2  1  3  4  9  4 10  7 15 10 11 10  0
 0  0  0  0  4  8  0  8  0  8  4  4  4  4 12 12  0  0 12  8 12

generates a code of length 21 over Z16 who´s minimum homogenous weight is 15.

Homogenous weight enumerator: w(x)=1x^0+98x^15+834x^16+3376x^17+11416x^18+26756x^19+56073x^20+64374x^21+56952x^22+27034x^23+11129x^24+3116x^25+752x^26+160x^27+59x^28+14x^29

The gray image is a code over GF(2) with n=168, k=18 and d=60.
This code was found by Heurico 1.16 in 129 seconds.