The generator matrix

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

generates a code of length 23 over Z4[X]/(X^2+2X+2) who´s minimum homogenous weight is 20.

Homogenous weight enumerator: w(x)=1x^0+35x^20+32x^21+32x^22+320x^23+30x^24+32x^25+16x^26+13x^28+1x^40

The gray image is a code over GF(2) with n=184, k=9 and d=80.
This code was found by Heurico 1.16 in 0.015 seconds.