The generator matrix

 1  0  0  1  1  1  2  1  2  1  1  2  2  1  1  0  1  0  1  0  0  1  1
 0  1  0  1  0  1  1  0  1  1  2  1  2  3  3  1  2  0  2  0  1  3  0
 0  0  1  1  1  0  1  0  3  1  3  3  1  1  0  0  3  1  2  1  2  3  0
 0  0  0  2  0  0  0  0  0  2  0  0  0  2  2  2  2  2  2  0  2  0  0
 0  0  0  0  2  0  0  2  2  2  0  2  0  0  2  0  2  2  0  2  2  0  0
 0  0  0  0  0  2  0  2  2  0  0  0  2  2  2  2  2  0  2  2  2  2  0

generates a code of length 23 over Z4 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+34x^18+46x^19+52x^20+72x^21+50x^22+46x^23+47x^24+40x^25+30x^26+34x^27+23x^28+16x^29+14x^30+2x^31+4x^32+1x^36

The gray image is a code over GF(2) with n=46, k=9 and d=18.
This code was found by Heurico 1.16 in 0.0105 seconds.