Let's be carefull out there
Join Date: Jan 2006
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Welcome to the forum. Plenty of people have had this problem. You are not alone. There was a poor batch of
fitted to OŁ model cars that cause this problem. The coild fits on top of the spark plug and the insulation at the base has been known to break down causing it to fail thus the rough running. This in turn allows unburnt fuel into the CAT giving the warning light.
Try not to drive the car under these conditions as the CAT can be damaged.
The good news the
are pretty cheap to buy and are often on e bay for very little money and they can be changed pretty easily at home (only a Torxc head key is needed)
There are plenty of threads on the subject if you do a quick search you will find lots of info.
Currently in chris m's garage:
2000 Scenic 2.0 16v Monaco, BMW 3 Series, Pug 206