Question about 2005 Peugeot 405

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My puegot 407 has a message telling me depollution system is faulty

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  • john lewyckyj Feb 01, 2010

    since the above problem happened i have noticed that theemission control warning light stays on all the time ,also i was travelling along and lost power to the engine ,stopped then the car restarted with no problem please advise

  • john lewyckyj Feb 01, 2010

    thanks dan appreciate your advice, is it going to do any damage driving around like this ?


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This could be the lambder sensor or the catalyst is on its way out, bare in mind though these computers are sometimes wrong on this model so get a second opinion from a garage. Sometimes they just need a good run out or a sensor cleaning.

Posted on Jan 31, 2010

  • Dan Doherty
    Dan Doherty Feb 01, 2010

    Hi then the fault must be the EGR valve, this is a Exhaust gas recycler valve, it basically takes all the unburnt fuel and pushes it back through the engine so to reduce waste and reduce emissions,
    I pretty sure thats the fault from the details you have provided. Second hand they are about £30 new maybe around £100. the car will lose a lot of power with this fault adn fels like the accelerator is not working properly when you push down on it.




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