I dont seem to be having much luck with my zafira at the moment, problem now is when you put your foot down (mainly in 3rd) it makes a bobing noise (like the exhaust it blowing) then either the car will voom off or it will stay and the exhaust light comes on flashing, sometimes you turn off the car and back on again and the light goes but the last time it did it the exhaust light has stayed on.

Anyone got any ideas what it might be or things i could check?