The generator matrix

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

generates a code of length 48 over Z4[X]/(X^2+2X+2) who´s minimum homogenous weight is 42.

Homogenous weight enumerator: w(x)=1x^0+20x^42+64x^43+67x^44+72x^45+179x^46+380x^47+516x^48+384x^49+160x^50+80x^51+43x^52+16x^53+21x^54+20x^55+11x^56+8x^57+3x^58+2x^60+1x^82

The gray image is a code over GF(2) with n=384, k=11 and d=168.
This code was found by Heurico 1.16 in 0.157 seconds.