Your car has a Diesel Particle Filter (DPF) fitted. Although we like to think that diesel engine cars are cleaner than they used to be, and they are a bit, the fact is they are still dirty and inefficient. Yet the emmision regulations are becoming ever more strict. As from July 2011 vehicles that must meet the new emmision standards will be three years old and will be subject to the MOT test for the first time.

A DPF collects soot which is produced when diesel fuel is burned so that what actually comes out the exhaust is not dense black smoke like older diesels used to be like. After a while the filter becomes full and the engine control unit will adjust the engine running to burn out the soot and clear the filter. This is known as regenerating. For this to happen you must be driving at more or less a constant speed of about 60mph for about 20 minutes at least. If you never drive the car like this it will never go through the regeneration process, and so the DPF will eventually become blocked and the fault warning lamp will come on. You may then have to take the car to the dealer who will have to carry out a forced regeneration using specialised diagnostic equipment. They're very unlikely to do it for free, and if it fails then a new DPF will be required and they're usually quite expensive.

In short, if your car is only ever used for short local trips then this problem will occur. Make sure you run it up and down the motorway fairly frequently to prevent this.

Also what would be the best one shot fuel system cleaner/additive for me to try, Redex, Wynns etc?

Which additive does the handbook recommend?

None. They are all snake oil.

I wood check you relay fuse for glow plugs as it can couse this issue in morning start if it sounds like a bag of nails then that's what mine is doing hope this helps any one basically you car takes longer to warm up so it's fells like it's going to cut itself of when press the gas pedal it goes fine .It will bring that code up antipolution warning it's confusing at times plus I can drive the car with out a problem bout it drinks like hell.thanks good luck .I won't advise using any cleaners as won't make no differences what's so whether.