405 Orange Warning Light

Hi,

Yes, it is the warning light for water in fuel.

Excepted if you haven't drained the fuel filter housing properly. But this is pure theory - the truth is somewhere else...

... This is the very common "water in fuel" light, which is, of course, specific to Diesel engines. All Peugeot Diesel owners know this light, most of time, has no meaning. It can lit on with no water in fuel housing. Best to do is to ignore it, and change your fuel filter following service instructions (I do change my fuel filter every two oil changes - far before the instructions).

Regards, G.T snipped-for-privacy@worldonline.fr

Normally you would just drain the fuel filter until water is expelled. This is part of the 12? or 18? thousand service when the fuel filter is replaced .Just replacing the filter will not get rid of the water. There is a drain plug on the fuel filter housing. Protect the clutch when you do this - diesel will ruin it.Get short lenth of plastic pipe to fit over the drain tap if one is not already there. Run the diesel fuel into a clean glass jar just to see if water is present.

If you have a Haynes manual then procedure is fully explained in the service section at the front as you will have to prime the fuel system after this.

This may solve the problem but if you have a tank full of contaminated fuel then it just will keep reappearing. ( does not seem like it if you have had this problem for a few months)

Otherwise it may be a faulty sensor.

Also if you have water in the diesel, you won't need a light to tell you. It will run like a pig, be difficult to start, and will smoke like a Bulgarian tyre factory.

I thought the light meant that that trap at the bottom of the fuel filter housing was full and needed draining (from my 309). It was only if you ignored it that the swine-like behaviour started.