Garage said it was a leak in a vacuum tube somewhere.
I went for a drive with one of the mechanic and CEL popped on. We went back to check the code and it was a response response time.
He reset it and said take it for a few days and give it a good drive. They weren't sure what was causing the problem so guessed it might just be the new cat needing to be worn in.

Any opinions? Or explanation on slow response time means?

Thanks guys

 

Well time has past and I finally have it back again; with a new oxygen sensor in the cat. And even more money spent.

They did forget to fix my wheel alignment though so I'll have to go back for that one.

 

Clutch pipe is gone now. Another €180 to fix that

 

Rear passenger side suspension is leaking now, that needs to be replaced.

Am I just super unlucky or is the RX8 built by lazy dumb blind people with no sensory organs?