The generator matrix

 1  0  1  1  1  6  1  1  8  1  1 10  1  1 12  1  1  4 14 12  1
 0  1 11  6 13  1  7  8  1 10  5  1 12  1  1 14  3  1  1  2  8
 0  0 12  0  4  8 12  4  4  0  0  8  8 12  8  4  0  4  4  8  4
 0  0  0  8  0  8  8  0  8  0  8  8  8  8  0  0  8  0  0  8  0
 0  0  0  0  8  0  8  0  0  8  8  8  8  0  8  0  8  0  8  8  8

generates a code of length 21 over Z16 who´s minimum homogenous weight is 17.

Homogenous weight enumerator: w(x)=1x^0+34x^17+182x^18+492x^19+897x^20+894x^21+948x^22+456x^23+119x^24+30x^25+22x^26+12x^27+7x^28+2x^29

The gray image is a code over GF(2) with n=168, k=12 and d=68.
This code was found by Heurico 1.16 in 0.285 seconds.