The generator matrix

 1  0  0  0  1  1  1  1  1  2  1  1  1  1  1  1  1  1  1  1  1 2a+2  1  1  1  1  0  1  1 2a 2a  0  0 2a  1  1  1  1 2a  1  1  1  1 2a  1  0  1  0
 0  1  0  0  0  2  2 2a+3 2a+1  1 3a 3a+3 a+2 a+3 a+1 2a 3a 2a+2 2a 2a+1 a+3  1 2a+1  3 3a+1 3a+2  1 3a+2 2a+3  1  1  2  1  2 3a+1 2a+2  a 3a+2  1 a+2  3  1 2a  2  0  1 3a  1
 0  0  1  0  1 3a+2 a+1  a 2a+2 3a+2 2a+3 3a+1  a 3a+2 3a+3  0 3a 3a+3  a a+3  0 3a+1  1 3a 2a+1 a+2  1  1 2a+3  2 a+2  1  3  1 a+2 3a+3  2 3a+1 3a+2 3a+1 3a a+1 a+1  1 3a 3a+1  2 2a
 0  0  0  1 3a+3  a  1  2 a+2 a+2  0  2 3a+1 2a+3 3a+1 a+2  0  2 a+3  a 3a+1 2a+2  3 2a+1 a+2 2a+1  a 3a+3 3a+2  1  3 3a+1 2a  1 3a+1 2a+1  0  2  2 2a+3  3 3a+3 3a a+2 3a+2 2a+2  2 2a+1
 0  0  0  0  2  0 2a  0  0  0  2 2a  2 2a  2 2a 2a+2 2a+2 2a+2 2a  0 2a  0  2  0 2a 2a 2a+2  2  2  0  2  0 2a 2a  0 2a+2  2 2a 2a 2a+2  2  2  2 2a+2  2 2a  2

generates a code of length 48 over GR(16,4) who´s minimum homogenous weight is 126.

Homogenous weight enumerator: w(x)=1x^0+372x^126+696x^127+504x^128+840x^129+2508x^130+2676x^131+2568x^132+2892x^133+6432x^134+6120x^135+4770x^136+5676x^137+12984x^138+12120x^139+8844x^140+10344x^141+20892x^142+18132x^143+11520x^144+13344x^145+24588x^146+18468x^147+11556x^148+11292x^149+17592x^150+11760x^151+5769x^152+4140x^153+6000x^154+3408x^155+1425x^156+624x^157+792x^158+348x^159+57x^160+30x^164+39x^168+9x^172+12x^176

The gray image is a code over GF(4) with n=192, k=9 and d=126.
This code was found by Heurico 1.16 in 176 seconds.