The generator matrix

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

generates a code of length 39 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 37.

Homogenous weight enumerator: w(x)=1x^0+20x^37+66x^38+86x^39+55x^40+18x^41+6x^42+2x^43+2x^53

The gray image is a code over GF(2) with n=312, k=8 and d=148.
This code was found by Heurico 1.16 in 0.032 seconds.