I have an evap fault which I think is the purge valve. I think this is causing my petrol smell.
Just wondered if the the charcoal canister ever needs changing or cleaning?

Yes, they get clogged up, and the valued opinion of the forum is to only buy genuine, most OBD scanners pick this up as a P0443 fault code

https://workshop-manuals.com/landrover/l32...rge_valve/

Part Number is WTV000040 ( aka Valve Fuel Vapour )

https://britcar.com/product.php/135186/0/

Land Rover Fuel Vapor Vent Charcoal Canister Purge Valve WTV000040 Range Rover 03 to 05





As a temporary fix you can try this, pull off the breather valve and spray some isopropyl alcohol
into both tube openings, shake it all up a little bit and let it sit, then let it all drain back out, wipe down and put it all back together




first pic under my index finger is where it's located






second pic - if you push back the upper radiator hose you can see it down under there, unplug the top connector then the two tubes, the one on the side has some push tabs on the side, and the one on the bottom just pulls off

Pic below is what the new part looks like

Great reply except the post is 7 years old and that car is long gone - I got a genuine one from bmw said it was for an x5 4.4 as it appear jlr put a further £40 markup on it Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

whoops - just noticed that - Febi seem good value under £40 quid - some of the JLR pricing is a joke
will get the Febi one to try

Fuel Tank Vent Valve Fits BMW X5 and 3 Series E36 E46 5 E39 7 E38 E65 E66

Part Number Febi 46426