the 2 isometry classes of irreducible [5,2,4]_9 codes are:

code no       1:
================
1 1 1 2 0
3 2 1 0 2
the automorphism group has order 8
and is strongly generated by the following 3 elements:
(
8 0 0 
0 3 0 
1 3 6 
, 1
, 
8 0 0 
4 4 4 
0 0 8 
, 1
, 
6 0 0 
4 1 2 
2 2 2 
, 1
)
acting on the columns of the generator matrix as follows (in order):
(3, 5), 
(2, 4), 
(2, 5)(3, 4)
orbits: { 1 }, { 2, 4, 5, 3 }

code no       2:
================
1 1 1 2 0
4 3 1 0 2
the automorphism group has order 20
and is strongly generated by the following 3 elements:
(
5 0 0 
7 1 6 
0 2 0 
, 1
, 
0 4 0 
8 8 8 
4 0 0 
, 1
, 
1 5 8 
7 0 0 
0 3 0 
, 1
)
acting on the columns of the generator matrix as follows (in order):
(2, 3, 4, 5), 
(1, 3, 4, 2), 
(1, 2, 3, 5)
orbits: { 1, 2, 5, 4, 3 }