My Astra 1.6 Club failed it's MOT today on the exhaust emissions. results below :-
Fast Idle Test CO Max limit 0.300 - actual value 1.037
Second Fast Idle Test - Max value 0.300 -actual value 1.015
Natural Idle Test - Max value 0.500 - actual value 1.133
The garage suggest its the catalytic convertor and will cost about £700 to fix.
They did also metion getting a computer on it to check for defo. Which would cost £55.
A couple of months ago the engine management light on the dash came on and a sensor was replaced on the exhaust so it seems weird that this is what the MOT has failed on.
Any advice/ideas welcome