Now I know from reading up on here, its either a bad o2 or cat. When I get on it a bit I get a slight burning smell. Now it could be my newbie m6 skills lettin the clutch off 2 slow while shifting, or something else related to this code? Any ideas?

Oh and I had it erased so I'll see if it comes back the same then its the cat and if its the p0402 or something like that its the o2. Hopin it just never comes back, im puttin in new cats with my headers soon ne how. Thanks for takin the time to read this.

 

ttt

 

Clear & see if returns. Does it smell like clutch or a over heated converter?

 

If you have access to a scanner, look at your post o2 readings. They should be far less active than the pre cat o2s in closed loop. If they are not, and they toggle like the pre cat o2's you might have a bad cat. Watching post o2 voltages can help tell you if the cat is operating efficiently. Thought it might help.