yet another trans failsafe error

[Ryoken]

last sunday I went out in the car to take a friend home , got in the car and she started ok however the battery seemed a little low on power, but she started , she then threw a trans failsafe error , so i turned her off and left her 5 mins then started again , started ok , but still popped the trans failsafe error , I thought it was a bug so carried on , she drove perfect , no other problems no gearbox issues nothing , any who, I got told to get the battery checked took it to battery shop they said the battery was ok but my alternator was a little "lazy"

as in I fired car up no throttle and the output on the alternator was low, gave it a tickle on the gas and the voltage popped up
any whoo , this morning , after no other issues I got home , I decided to read the codes using my laptop , couldn't see any so I reset my codes, , ive now got...........
no speedo , no rev counter, dcs, abs and TC all on , temp and fuel guage on full , and she is definatly stuck in 3rd
so I decided to buy another battery just to be on the safe side, disconnected battery for 1 hour , put new one in and started it up , still same issues

any ideas??

Steve

02 4.4