Exhaust system fault

Hi,

Anyone know what component failure to do with the exhaust system could cause the emissions to go up so far the cpu wont allow the vehicle to be driven? [This is in a 2006 renault cleo.]

cheers

Reply to
Al
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Catalytic converter?

Reply to
Roger Mills

Lamda sensor? Some have two (or more) before and after the cat(s). But are usually fairly easy to change and should throw up a fault code.

Reply to
Dave Plowman (News)

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