The generator matrix

 1  1  1  1
 0  3  0  0
 0  0  3  0
 0  0  0  3

generates a code of length 4 over Z9 who´s minimum homogenous weight is 3.

Homogenous weight enumerator: w(x)=1x^0+8x^3+24x^6+162x^8+32x^9+16x^12

The gray image is a code over GF(3) with n=12, k=5 and d=3.
This code was found by Heurico 1.16 in 5.7e-005 seconds.