DCCD green "O" flashing 1997/P WRX STI Type R 2 door
 

I've had my Japanese imported yellow 1997 2 door Impreza WRX STI Type R from new and it has never let me down in 21 years. Got in it today as it's -4c in London and I fancied a bit of 4wd fun in the snow. Tried to lock the diff and noticed the green "O" light is flashing constantly. Any ideas? The car does not have ABS - it is too old and pre ABS! Any suggestions? Michael +44 (0)7973 115597

Means you have a fault somewhere check wires on top of gearbox for starters.