SOURCE: my puegot 407 has a message telling me depollution
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.
SOURCE: peugeot 407 coupe 2.7 hdi p0069 fault code comes
o2 sensor needs to be replaced and computer reset by disconnecting battery negative cable for 1/2 hr then reconnecting. Good Luck!
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