Originally Posted by
Nick.W
Managed to get mine down to 3 I think but it was a struggle. Is yours running closed loop?
It is yes but I have no cats in the exhaust - this is gonna kill my chances of a 1.5 utopian CO level. Just realised this douh

If it was catted up then I would be getting much lower readings.
What do other Cossie users get as a CO reading on their modded cars?