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if its a diesel, you need the additive tank topping up. - ain't cheap!! some kind of chemical. car will run ok, but it will lrad to other problems in time.

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The only time my car shows an antipollution fault is if it runs out of diesel, once refueled, the fault shows for a few miles then just goes. If the fault is there permanently and your car hasn't run out of fuel recently then I suggest getting it looked at.

Hello to all,

Got a 406 hdi and found the fault with the anti pollution lies within the mass air flow unit. SOLUTION. Remove the mass air flow unit and using a soft bristle brush and some petrol clean the unit completely ensuring not to break the electrodes inside and making sure you clean the mess grid. This will prolong the life of the mass air flow unit. Done this on a few other Peugot's and had great success. On my own done it once so far and never had the problem back since. (year and half ago)........................

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Q: Why anitpollution fault appears in peugeot 406?
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