The generator matrix

 1  0  0  1  1  1  1  1  1  3  1  1 X+3  1  X 2X+3  1  1  1  1  6  1  1  1  1  1  1  1  1  1  6 2X+3 2X  1  1  1  1  1  1 X+3  1  1  1  0  1  1  1 X+3 2X+6  1 2X+6  1  1  1  1  1  1  1 2X+3  1  1 X+3  0  1  1  1  1  1  1  1  1 2X+6  1  1 2X+6  1  1  1 2X X+3  1  1  1  1
 0  1  0  3  1  4  2  X  8  1 2X+4 2X+2  1 X+3  1 2X+6  6  2 X+6 2X+7 2X+6 2X X+8 X+2 X+7 X+1  0 2X+1 2X+5 X+5  1  1  1 X+4 2X+1 2X+3  5  4  3  1 2X+2 X+3 X+1  1  7 2X+6 X+4 2X+3  1  X  0 X+5 2X+2 X+8  7 X+2  8 X+6  1 X+6  6 X+3  1 2X+8 2X 2X+3  5  0 2X+2 2X+1  1  1 2X+8 2X+1 X+3 X+4  8 2X+3  1  1 X+1  1  6 X+5
 0  0  1 2X+4 2X+1  3 X+8 X+5 2X+6  4 2X+2  4  2 2X X+6  1  7  5 2X+8  2  1 X+3 2X+6  4 2X+2 X+7 2X+5 2X  5 X+4 2X+7 2X+8  0  6 2X+1  0  X  8 X+1 2X+8 X+6 X+4  8  2 X+7  7 2X  1 X+3  X  1 X+5 2X+3 X+6 2X+8  6 2X+1 2X+4 2X+2  4 X+8  1 2X+6 X+5 X+8 2X+7  3  X X+1  7  7 X+4 2X+4  3  1 2X+4  5  8 2X+1  6  4 X+8 X+7 2X+7

generates a code of length 84 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 162.

Homogenous weight enumerator: w(x)=1x^0+1220x^162+1698x^163+1224x^164+2688x^165+2016x^166+954x^167+1830x^168+1584x^169+810x^170+1528x^171+936x^172+558x^173+1050x^174+606x^175+180x^176+500x^177+270x^178+8x^180+12x^181+6x^184+4x^186

The gray image is a code over GF(3) with n=756, k=9 and d=486.
This code was found by Heurico 1.16 in 15.2 seconds.