hi im new to this but need some advice iv just bought a o3 impreza wrx which iv been told by a m8 that its has been de catted but the engine management light keeps comin on is there anyway i can stop this happening my has plugged something in to turn it off and it said the cats knackered but it aint got 1 ????????? the light has come back on now any 1 no how to sort it ??????????????

 

Has the car been remapped?? If not it will need it urgently otherwise you could destroy your engine as the car will overboost.