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350matt
350matt, Mechanical Engineer
Category: Peugeot
Satisfied Customers: 21708
Experience:  BEng Hons, worked in the car industry for last 22 years
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Need help with anti pollution fault on Peugeot 307 1.4 petrol

Customer Question

Hi need help with anti pollution fault on Peugeot 307 1.4 petrol 06 reg
Submitted: 1 year ago.
Category: Peugeot
Expert:  350matt replied 1 year ago.
Hello to get an anti-pollution fault that this could be an O2 sensor issue so check for exhaust leaks before the O2 sensor as if this has been experiencing an exhaust leak then it will have been running very rich as the sensor will see the extra air pulled in as fresh / lean fuelling and be adding fuel to compensate. this can lead to catalyst failure as the extra fuel can re-light inside and melt the catalyst The best way to find an exhaust leak is to run the engine from cold and feel around the exhaust joints with your bare hands - you'll have about 30 seconds before it all gets too hot and you should feel any escaping gas blowing over your fingers
Expert:  350matt replied 1 year ago.
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